Journal of Zhejiang Agricultural Sciences

Dry matter accumulation characteristics of sweet potato cultivated with film mulching

ZHAI Wenxi, LI Xiangling, YANG Qing, WANG Jian, YANG Min, LIU Xueru, HAN Jinling

2024, 65 (3): 489-496. DOI: 10.16178/j.issn.0528-9017.20230085

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In order to explore the dry matter accumulation characteristics and yield enhancement effect of sweet potato under mulching culture, the study was conducted in Lulong County, Qinhuangdao, Hebei Province in 2021, using the local main cultivars Luxuan 1 and Jishu 25 as experimental materials, and using non-mulching cultivation as the control, and the differences in vine length, dry matter accumulation characteristics and yield of sweet potato under mulching and non-mulching cultivation were compared and analyzed under field conditions. The results showed that the aboveground stems and vines grew faster under film mulching, the aboveground dry matter accumulation was faster in the early growth stage, and the transfer to the root tuber was more in the late growth stage. Under film mulching, the root tubers expanded early and quickly, and the dry matter accumulation of the roots showed a doublet curve. The dynamics of dry matter accumulation in the whole plant of sweet potato conformed to the Logistic model, and the dry matter accumulation period of sweet potato under mulching culture entered the rapid dry matter accumulation period earlier, the total dry matter accumulation was more, and the ratio of dry weight of stems and leaves to tuber dry weight (T/R value) was lower than that of non-mulching cultivation in most of the time. The number of sweet potato tubers per plant increased, the weight per plant increased, the rate of large and medium potatoes increased, and the rate of small potatoes decreased, and the yield increase effect was obvious. In conclusion, film mulching cultivation can change the dry matter accumulation characteristics of sweet potato and increase yield. This study provides a theoretical basis for the production and promotion of sweet potato under film mulching.

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Effects of Chlamydomonas debaryana powder on growth and physiological indices of wheat seedlings under salt stress

WANG Yanqin, LI Wuyang, MENG Xiangang, LUO Guanghong

2024, 65 (3): 497-504. DOI: 10.16178/j.issn.0528-9017.20230162

Abstract ( 205 )

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Salt stress is one of the most main abiotic stresses faced by plants. In terms of agricultural production, it is of great significance to study the effects of bio-fertilizers on plant physiological indices under salt stress. Currently, the effects of algae bio-fertilizer on salinized soil have been widely studied. However, its effects on plant physiological indices under salt stress remains to be unclear. Chlamydomonas debaryana powder was used as bio-fertilizer in this study. algae powder with different concentrations (0.25, 0.5, 1.0, 2.0 g·L^-1) were added to wheat seedling sandy soil under high salt stress, The biomass, soluble sugar content, soluble protein content, antioxidant enzyme activity, malondialdehyde content and ion balance of wheat were measured. The results showed that salt stress significantly inhibited the root length, stem length, dry weight and fresh weight of wheat, decreased the contents of soluble sugar and soluble protein, decreased the activity of antioxidant enzymes, and increased the content of malondialdehyde. The root length, stem length, dry weight and fresh weight of wheat increased significantly, the contents of soluble sugar and soluble protein increased, the activity of antioxidant enzymes increased, and the content of malondialdehyde decreased after algae powder was added at different concentrations. Correlation analysis showed that the algae powder could promote wheat growth, significantly change wheat physiological indices, and improve its salt tolerance. By comprehensive comparison, the effect of 1 g·L^-1 algae powder treatment group was the most significant.

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Effects of different fertilization patterns of three slow-releasefertilizers on wheat yield and economic benefits

XIN Haibin, YANG Xuqing, XU Ruiheng, WANG Ying, ZHANG Yan, FAN Xiaokai

2024, 65 (3): 505-512. DOI: 10.16178/j.issn.0528-9017.20230147

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In order to understand the application effects of different slow-release fertilizers on wheat production cost saving, yield increase and efficiency increase, and to explore the effects of different fertilization modes on yield and efficiency, the supporting application technologies of different slow-release fertilizers in wheat production in Jiangdu District were studied. The results showed that the slow-release fertilizer had the ability to slow down and control the release of nutrients in wheat production, which could change the traditional habit of multiple fertilization, and the three kinds of slow-release fertilizer were used as basal fertilizer and top dressing for secondary application, and the reasonable ratio could save labor and cost, increase yield and efficiency. Under the premise of equal nitrogen, slow-release fertilizer + urea base application, compound fertilizer + urea booting stage topdressing was more effective than conventional fertilization to increase yield and efficiency, it was not recommended that slow-release fertilizer in wheat production one-time base application, it can save labor, but it can't save cost, due to the long growth period of wheat, the fertilizer effect in the later stage can not be connected, it was easy to lack fertilizer and premature aging, affect the yield. In the appropriate sowing period, the yield and efficiency increase of Hanfeng slow-release fertilizer was the most obvious, and the topdressing treatment of slow-release fertilizer + urea base application and compound fertilizer + urea booting stage was the second in yield and the first in benefit. Under the premise of equal nitrogen content on different sowing dates, the application of slow-release fertilizer and fast-acting urea in the ratio of base fertilizer can significantly reduce costs and improve economic benefits.

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Effects of different sowing methods and fertilization levels on photosynthetic characteristics and yield composition of highland barley

ZHOU Xirong, LIU Meijin, XU Dongli, WANG Guoping, GUO Jianwei, LIU Guangcai, ZHANG Zhongguang, HU Zaiqing

2024, 65 (3): 513-520. DOI: 10.16178/j.issn.0528-9017.20230044

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In order to explore the response mechanism of Ganqing series barley varieties to wide and uniform sowing and conventional strip sowing under the same fertilization conditions, a two-factor random block design of sowing method and fertilization level was used in this experiment. A total of 2 sowing methods and 5 fertilization levels were set, for a total of 10 treatments. The results showed that conventional strip sowing could increase the basic seedlings, tiller number and plant height of Ganqing 9, while wide and uniform sowing could increase the panicle length of Ganqing 9. Wide and uniform sowing could increase the net photosynthetic rate and stomatal conductance of the leaves of Ganqing 9 and reduce the intercellular carbon dioxide concentration, while conventional strip sowing reduced the transpiration rate of Ganqing 9 leaves. Compared with conventional strip sowing, wide and uniform sowing could effectively increase the yield, grain number per spike, grain weight per spike and 1 000-grain weight of Ganqing 9, while effective spike sowing was higher in conventional strip sowing than wide and uniform sowing. In conclusion, under the condition of equal fertilizer, wide and uniform sowing could significantly increase the number of grains per spike and 1 000-grain weight, increase the yield, and facilitate the photosynthetic absorption and synthesis of flag leaves.

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Effects of polyurethane coated slow-release fertilizers on yield and utilization efficiencies of nutrients of double-cropping rice

JIANG Minhua, DING Yi, LI Kuan, MENG Haoran, PAN Yimin, ZHANG Chao

2024, 65 (3): 521-524. DOI: 10.16178/j.issn.0528-9017.20220928

Abstract ( 136 )

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Based on the scientific and reasonable fertilization scheme, according to supply capacity of soil nutrient, fertilizer requirement regularity of rice, and target yield, this experiment adopted the principles of soil to yield determination, yield to fertilization requirement and application of slow-release fertilizer to explore the influence of polyurethane coated slow-release fertilizer on the yield and fertilizer use efficiency of double-cropping rice in Wucheng Distrist, depending on the formulation technology of soil testing. The results showed that for the early rice, the target yield and actual yield were 6 000.0 kg·hm^-2, and 6 405.0 kg·hm^-2, respectively, under full fertilizer treatment. The N, P and K use efficiencies were 44.9%, 25.2% and 49.1%, respectively. For the late rice, the target yield and actual yield were 8 250.0 kg·hm^-2, and 8 707.5 kg·hm², respectively, under full fertilizer treatment. The N, P, K use efficiencies were 43.6%, 27.8% and 51.6%, respectively. Polyurethane coated slow-release fertilizer is an excellent slow-release fertilizer. The average N, P and K use efficiencies were 44.3%, 26.5% and 50.4%, respectively, by applying polyurethane coated slow-release fertilizer. Thus, it is recommended to use polyurethane coated slow-release fertilizer instead of general compound fertilizer.

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Grey comprehensive evaluation and screening of new hybrid late japonica rice varieties

ZHANG Jianying, ZHU Guofu

2024, 65 (3): 525-530. DOI: 10.16178/j.issn.0528-9017.20230004

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Cultivation screening was conducted on 30 hybrid late-maturing japonica rice varieties, and a comprehensive evaluation of 8 traits was carried out using grey comprehensive evaluation method. The results showed that 10 varieties, including Yongyou 1540 and Yongyou 12, had G values greater than 0.65, indicating excellent quality; 11 varieties, including Yongyou 69 and Yongyou 15, had G values ranging from 0.60 to 0.65, indicating good quality; and 9 varieties, including Yongyou 7826 and Yongyou 1516, had G values less than 0.60, indicating inferior quality. Based on this, it is proposed that 10 varieties with excellent overall traits, such as Yongyou 1540, Yongyou 12, and Yongyou 7850, can be used for production in Jiaxing, northern Zhejiang.

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Effect of stable nitrogen fertilizer on economic characters and fertilizer utilization efficiency of Yongyou 15

ZHANG Huaijie, HU Tiejun, XU Rongrong

2024, 65 (3): 531-535. DOI: 10.16178/j.issn.0528-9017.20240300

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In order to reduce the application amount of nitrogen fertilizer, improve fertilizer utilization efficiency, and reduce environmental pollution, a comparison was made between stable nitrogen fertilizer "Yiji nitrogen" and conventional urea topdressing, as well as a comparison of different nitrogen fertilizer amounts, to explore whether new nitrogen fertilizer can replace urea topdressing to ensure high rice yield. At the same time, the impact of different nitrogen fertilizers on nitrogen fertilizer utilization efficiency and changes in soil total nitrogen were also explored. The experiment was divided into two parts: a comparative trial of stable nitrogen fertilizer and urea topdressing, and a trial of different amounts of stable nitrogen fertilizer. The results showed that the top dressing effect of stable nitrogen fertilizer was not as good as urea, and an increase of 20% application can achieve a certain degree of yield increase. During the entire production process, the application of stable nitrogen fertilizer at a rate of 624 kg·hm^-2 resulted in the fastest tillering, highest yield, and highest utilization efficiency. At the same time, compared with urea, it had a better effect on maintaining soil nitrogen balance.

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Experimental study on field fertilizer efficiency of fresh corn soil testing and formula fertilization in Wenzhou

HUANG Yechang, ZENG Wei, DENG Lizhang, KANG Yuliu, PAN Binrong

2024, 65 (3): 536-540. DOI: 10.16178/j.issn.0528-9017.20221092

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In order to guide the scientific and rational fertilization of fresh corn in Wenzhou City and improve the production efficiency, the “3414” field fertilizer efficiency test was carried out in this study. It was found that the key fertilizer factors affecting the yield were different under different soil conditions, and it was of great significance to carry out soil testing and formula fertilization of fresh corn. Soil organic matter content plays an important role in ensuring the basic yield and improving the yield, and special attention should be paid to the combined application of organic fertilizer and ordinary chemical fertilizer in production. The efficiency of fertilizer application in this region is high, but in the actual production, it is necessary to avoid yield theory, and it is necessary to pursue the maximization of income and reduce the amount of fertilizer under the condition of ensuring the best income level. According to the model, the maximum benefit values per 667 m² of the two experimental sites in this study could reach 3 285.59 and 3 129.29 yuan, respectively, and the optimal fertilization rates of nitrogen, phosphorus and potassium in Lucheng District were 22.40, 15.56 and 26.68 kg, and the optimal fertilization rates of nitrogen, phosphorus and potassium in Wencheng County were 26.25, 15.98 and 19.50 kg. Combined with the soil fertility, on the whole, the application of N 25 kg, P 15 kg and K 25 kg per 667 m² in Wenzhou area, that is, N∶P∶K is 1.67∶1∶1.67, which has certain guiding significance as the basic fertilization rate.

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Effect of partial substitution of chemical fertilizer with organic fertilizer on yield and nitrogen use efficiency of maize

XIE Xiaocong, ZHENG Xiaokang, XU Xinxin, LI Xiaoli, SHI Liyun, BAO Rizai

2024, 65 (3): 541-544. DOI: 10.16178/j.issn.0528-9017.20230716

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In order to clarify the substitution scheme of organic fertilizer for maize in yellow and red loam soil in southern Zhejiang, the effect of chemical fertilizer substitution with fertilizer on maize yield and nitrogen use efficiency was tested. In the field experiments, no fertilization treatment (CK), nitrogen, phosphorus and potassium fertilizer treatment (NPK), phosphorus and potassium fertilizer treatment (PK), nitrogen substitution chemical fertilizer 15% basal organic fertilizer treatment (T15), and nitrogen substitution chemical fertilizer with 30% basal organic fertilizer treatment (T30) were set up. The results showed that compared with NPK treatment, the straw yield of T30 treatment was reduced by 17.11%, T15 and T30 treatments decreased the nitrogen content of grains, by 16.73% and 17.83%, respectively, and the nitrogen uptake of grains in T15 and T30 treatments decreased by 15.00% and 20.30%, respectively. The nitrogen uptake of straw treated with T30 was reduced by 31.75%, and the internal use efficiency of nitrogen in T15 and T30 treatments increased by 23. 10% and 28.61%, T30 reduced the content of ammonium nitrogen in soil by 24.61%。 This study showed that the replacement of 15%-30% chemical fertilizer nitrogen with organic fertilizer nitrogen could maintain maize yield, improve soil fertility and nitrogen use efficiency, and reduce the amount of chemical fertilizer, which was suitable for popularization and application in maize production in southern Zhejiang.

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Study on the dynamic changes of oil content and fatty acid composition of Camellia oleifera in Wenzhou

LIANG Wenjie

2024, 65 (3): 545-548. DOI: 10.16178/j.issn.0528-9017.20230206

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With the development of the health care industry, camellia oil has attracted more and more attention as an edible oil that meets health standards. In order to understand the changes of oil content and fatty acid composition of Camellia oleifera varieties Ganwu 1 and Ganwu 2 introduced in Wenzhou, the fresh fruit weight, dry seed rate, seed composition and fatty acid composition of Camellia oleifera were measured at six different time points. The results showed that the fresh fruit weight of Ganwu 1 and Ganwu 2 decreased with the delay of time, while the dry seed rate showed an upward trend. The content of protein and soluble sugar gradually decreased, while the content of starch increased gradually, and the content of fatty acids gradually increased firstly, and then basically stabilized. The fat content of the two varieties was 4.49 and 4.51 g·kg^-1, respectively, which reached the standard of good varieties. The contents of stearic acid and oleic acid in camellia oil fatty acids gradually increased with the delay of time, while the contents of linoleic acid and α-linolenic acid gradually decreased with the delay of time.

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Effects of different types of potassium fertilizer and application period on upper leaf quality of tobacco in Changsha

ZHANG Wenjun, ZHANG Qingfu, YANG Liu, SONG Jiajun, HE Jiguang, YANG Zaijun, XIONG Chengliang

2024, 65 (3): 549-554. DOI: 10.16178/j.issn.0528-9017.20231170

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In order to explore the effects of different types of potassium fertilizer and application period on the yield and quality of upper leaves of tobacco in Changsha tobacco area and improve the industrial availability of upper leaves. In this study, Yunyan 87, the main local cultivate, was used as the experimental material. Through field test, 5 treatments were set up in random block arrangement, and 3 replicates were performed. The results showed that different types and application periods of potassium fertilizer had certain effects on the agronomic traits of tobacco plants. T1 treatment was superior to other treatments in terms of plant height, leaf number and leaf area. Different types and application periods of potassium fertilizer could promote the appearance quality of flue-cured tobacco, and there was no significant difference between T1 and T4 treatment. Different types and application periods of potassium fertilizer could improve the chemical composition and coordination of tobacco after roasting, and could improve potassium and reduce alkali to a certain extent, among which T1 treatment had the highest content of total sugar and reducing sugar, and its coordination was better than other treatments. Different types and application periods of potassium fertilizer had great influence on the sensory quality of tobacco after roasting. The total score of sensory evaluation of T1 treatment was the highest, and the aroma quality, aroma quantity, fineness and aftertaste were higher than those of the control group. The economic properties of flue-cured tobacco were improved by different types of potassium fertilizer and application period. T1 treatment significantly improved the economic properties of flue-cured tobacco and could increase the income of tobacco farmers to the greatest extent. In summary, different types and application periods of potassium fertilizer could affect the field growth of tobacco plants and the tobacco production quality after the upper leaves were roasted. The improvement of tobacco leaves by applying potassium fulvic acid in various aspects was better than that of liquid potassium fertilizer, and the effect of applying potassium fulvic acid in seedling stage (T1 treatment) was the best.

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Effects of monthly average air temperature on photosynthetic characteristics and total flavonoids content in root tubers of Tetrastigma hemsleyanum Diels et Gilg seedlings grown in containers under the forest

ZHANG Jianmin, LIN Guowei, LOU Jun

2024, 65 (3): 555-561. DOI: 10.16178/j.issn.0528-9017.20230043

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The effects of monthly average temperature in Wufu Mountain from 2015 to 2019 on photosynthetic characteristics and total flavone content in root tubers of Tetrastigma hemsleyanum Diels et Gilg seedlings grown in containers under the forest were investigated. The results show that from 2015 to 2019, the temperature in Wufu Mountain is the lowest in January, rising gradually from February to June, reaching the highest value from July to August, and decreasing gradually from September to December. With the gradual increase of temperature from January to June, the SPAD value, net photosynthetic rate (P_n), stomatal conductance (G_s), transpiration rate (T_r), stomatal limitation (L_s), instantaneous carboxylation rate (CUE), initial fluorescence (F_o), maximum fluorescence (F_m), minimum fluorescence (F'_o), maximum fluorescence under light (F'_m), steady-state fluorescence (F_s), maximum light energy conversion efficiency (F_v/F_m), potential photochemical efficiency of PSⅡ(F_v/F_o), actual photochemical efficiency of PSⅡ(Φ_PSⅡ), open PSⅡ reaction center capture excitation energy efficiency (F'_v/F'_m), photochemical quenching coefficient (q_P) and total flavone content in root tuber increased significantly(P<0.05), intercellular CO₂ concentration (C_i), water use efficiency (WUE) and non photochemical quenching coefficient (NPQ) decreased significantly(P<0.05). The temperature reached the highest value in July and August, and the chlorophyll content SPAD, P_n, G_s, T_r, L_s, CUE, F_o, F_m, F'_o, F'_m, F_s, F_v/F_m, F_v/F_o, ΦPSⅡ, F'_v/F'_m, q_P and the contents of total flavonoids in root tuber reached the maximum, and C_i, WUE and NPQ reached the minimum. From September to December, the temperature gradually decreased, SPAD, P_n, G_s, T_r, L_s, CUE, F_o, F_m, F'_o, F'_m, F_s, F_v/F_m, F_v/F_o,Φ_PSⅡ, F'_v/F'_m, q_P and the contents of total flavonoids in root tuber decreased significantly(P<0.05), while C_i, WUE and NPQ increased significantly(P<0.05). The results of this experiment can provide the basis of meteorological factors (air temperature) for container ecological cultivation of Tetrastigma hemsleyanum Diels et Gilg seedlings under the forest.

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Rapid identification of geo-herbalism of Aconitum carmichaeli by spectroscopy

ZENG Feng, WANG Fangcheng

2024, 65 (3): 562-566. DOI: 10.16178/j.issn.0528-9017.20230012

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X-ray fluorescence spectroscopy and near-infrared spectroscopy were used to differentiate geo-herbalism of Aconitum carmichaeli. Geo-herbalism samples from different production areas and other samples were collected. After processing the samples, they were scanned using an Axios type X-ray fluorescence spectrometer and an Antaris Ⅱ Fourier-transform near-infrared spectrometer. The differences in Na and Mg element content were identified as characteristic markers for authentic samples. By using Mahalanobis distance to establish a three-dimensional spatial model, it was possible to distinguish Jiangyou samples from samples from other production areas, showing good predictive performance. Therefore, X-ray fluorescence spectrometry and near-infrared spectroscopy techniques can be used to rapidly and effectively identify authentic Jiangyou Aconitum carmichaeli.

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Effects of different base fertilizer treatments on the growth and yield of vegetable broad beans

ZHONG Yangmin, LIU Tingfu, LI Hanmei, LIU Chengwei, MA Ruifang, RUAN Meiying, WANG Linlin

2024, 65 (3): 567-570. DOI: 10.16178/j.issn.0528-9017.20231160

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In order to compare the effects of different base fertilizer treatments on the growth and yield of broad bean variety Lican 3, the organic fertilizer of sheep manure and compound fertilizer, silkworm dropping organic fertilizer and compound fertilizer, carbon-based fertilizer and compound fertilizer, chicken manure organic fertilizer and compound fertilizer and microbial agent were set up to study the growth and yield change characteristics of vegetable broad bean. The results showed that different base fertilizer treatments increased the yield of Lican 3, and the treatment of sheep manure organic fertilizer and compound fertilizer increased the yield by 16.2% and increased the income by 16.1% compared with CK, and the application effect was good, the total cost of base fertilizer was low, and it had a good application prospect in vegetable broad bean.

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Vernalization time and planting density test of broad bean

WANG Qinxia, ZHANG Xianping, ZHU Weijun, JIANG Libin, WANG Honghui

2024, 65 (3): 571-573. DOI: 10.16178/j.issn.0528-9017.20221209

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In order to advance the picking period, extend the picking cycle of broad beans, and increase the planting efficiency of fresh broad beans, the vernalization treatment time and planting density experiments of broad beans were carried out. The results showed that vernalization of broad bean at 4 ℃ for 20-30 days could significantly advance the picking period of broad bean, extend the picking cycle, significantly increase the number of pods per plant and 100 pod weight, and thus increase the yield of fresh pods. Vernalization treatment for 30 days could significantly increase the number of grains per pod and pod length, and reduce the node position of the first flower. Reducing the planting density could increase the number of pods and branches per plant, but did not have a significant effect on yield. Planting 1 500 plants (plant spacing 35 cm) at 667 m² is the best choice, which can save the amount of seeds, reduce production costs and labor without reducing yield, and improve the quality of fresh broad beans. This test can provide technical support for the production of broad beans in Wenling City.

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Effects of different fertilization schemes on the growth, development, and fruit quality of indoor planted tomatoes

WEN Diandian, WANG Ning, ZHANG Yuzhu, TONG Fang, DUAN Jinhui, WANG Yuanxiu, YANG Lu

2024, 65 (3): 574-582. DOI: 10.16178/j.issn.0528-9017.20230207

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To investigate the effects of different fertilization schemes on the growth, development, and fruit quality of indoor planted tomatoes, wild-type tomato Micro Tom was used as the research object, and 8 different fertilization treatments were applied throughout the entire growth cycle. Specifically, it includes root irrigation with clean water (CK), foliar spraying with nutrient solution (T1), foliar spraying with phosphorus fertilizer (T2), foliar spraying with small particle fertilizer (T3), foliar spraying with nutrient solution+phosphorus fertilizer (T4), foliar spraying with nutrient solution+root spraying with small particle fertilizer (T5), foliar spraying with phosphorus fertilizer+root spraying with small particle fertilizer (T6), foliar spraying with nutrient solution+foliar spraying with phosphorus fertilizer+root spraying with small particle fertilizer (T7). The results showed that compared with the control group, T3, T5, and T6 could significantly promote the growth of tomato plant height, stem diameter, and second lateral branch; T3 and T7 treatments can promote the synthesis of chlorophyll; T5 treatment can significantly promote tomato flowering, fruit size, and seed number; T3 treatment can significantly increase the number of tomato fruits; The soluble sugar content of T3 and T7 was higher than that of T5 and T6; The vitamin C content of T5 and T6 was higher than that of T3 and T7. In summary, applying only small particles, nutrient solution+small particles, phosphorus fertilizer+small particles, and nutrient solution+phosphorus fertilizer+small particles can significantly promote the growth, yield, and quality of tomatoes. Among them, the fertilization scheme that only applies small particles costs less than other treatment groups, and can reduce the harm of fertilizer to the environment, making it the best fertilization scheme.

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Study on the growth and development characteristics of taro in photovoltaic facilities in northern Jiangsu

WANG Pu, LI Baicheng, WANG Li, GUO Wenqi, HAN Xiaoyong, YIN Jianmei, JIN Lin, JIANG Lu, ZHANG Peitong

2024, 65 (3): 583-586. DOI: 10.16178/j.issn.0528-9017.20221291

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Taro is a characteristic cash crop in Jiangsu Province, and the planting scale in northern Jiangsu is gradually expanding, but the research on photovoltaic taro planting has not yet been reported. In this experiment, green bud taro was planted in the open space between photovoltaic panels, and the growth and development, product yield, cost-effectiveness, light and temperature environmental factors were compared with those of conventional taro planting in the open field. The results showed that taro planting could be carried out between photovoltaic array panels in northern Jiangsu, and the taro seedling emergence rate was higher, and the vegetative growth was stronger, which could significantly increase the number of cormels and taro yields, and the economic benefits were better. Therefore, the development of photovoltaic taro industry in northern Jiangsu has good promotion value and application prospects.

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Effects of uniconazole concentrations on the growth characteristics and yield of fresh sweet potato

ZENG Yannan, ZHAO Hanwei, JI Hongting, CHENG Rundong, WANG Shihong, WANG Yong, ZHAO Hejuan

2024, 65 (3): 587-591. DOI: 10.16178/j.issn.0528-9017.20230354

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In order to study the effect of uniconazole on the growth characteristics and yield of fresh sweet potato, four comparative experiments with different concentrations were carried out using Xinxiang as the test material. The results showed that the ratio of fresh weight between the aboveground and underground parts of all treatments treated with uniconazole was lower than that of the control, and the yield and chlorophyll content of fresh potatoes were higher than those of the control. The results indicated that the spraying of uniconazole could relatively delay the growth of the aboveground, reduce the energy consumption of the aboveground, and improve the photosynthetic efficiency, so as to achieve the purpose of increasing yield. In this experiment, spraying 75 mg· L^-1 uniconazole is the best, its yield of 667 m² fresh sweet potatoes was 2 528.46 kg, which was 13.35% higher than that of the control.

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Effect of phosphorus on antimony accumulation andgrowth characteristics of Ficus tikoua

WANG Yong, XIANG Yuan, XU Wei

2024, 65 (3): 592-599. DOI: 10.16178/j.issn.0528-9017.20230283

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The effects of phosphorus (P) and antimony (Sb) on the physiological change of Ficus tikoua through sand culture method on biomass, chlorophyll content, and chlorophyll fluorescence parameters were discussed. The simple factor analysis of variance and further statistical method of multiple comparison and independent exponent t-test were used. The results showed that low concentrations of phosphorus had a promoting effect on the accumulation of dry matter in the stems and leaves of Ficus tikoua. Phosphorus not only increased the phosphorus content in the roots and leaves of Ficus tikoua, but high concentrations of phosphorus also promoted the absorption of potassium in the roots of Ficus tikoua. High concentrations of phosphorus can increase the content of free proline in leaves, as well as the content of protective carotenoids in the leaves, reducing damage to the photosynthetic system. Phosphorus has a promoting effect on the growth of Ficus tikoua under antimony treatment, which can increase the accumulation of dry matter in the roots and leaves of Ficus tikoua. Moreover, high concentrations of phosphorus can alleviate the toxic effect of antimony, reduce the content of proline in leaves, and promote the synthesis of chlorophyll a and carotenoids.In addition, an appropriate amount of phosphorus can promote the absorption of antimony by Ficus tikoua roots and limit the storage of antimony in Ficus tikoua leaves.

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Effects of seaweed fertilizer on nutrient uptake and transport in loquat seedlings

CHEN Mingmin, HUANG Yong, MA Qiaoli, XU Yaxin, LIN Lijin, ZHANG Huifen, XIE Jing, DENG Qunxian

2024, 65 (3): 600-607. DOI: 10.16178/j.issn.0528-9017.20230520

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To explore the effect of seaweed fertilizer on nutrient uptake and transport in loquat seedlings, this study investigated the effects of different dilution ratios of seaweed fertilizer on nitrogen, phosphorus and potassium uptake and transport. The biomass, total N, total P and total K contents in the roots, stems, leaves and aboveground parts of loquat seedlings were increased by spraying different concentrations of seaweed fertilizer,and the contents of them first increased and then decreased with increasing seaweed fertilizer dilution ratio.The application of seaweed fertilizer improved the uptake, transfer volume, transfer efficiency and transfer contribution rate for N, P and K in each part of the loquat seedlings and the 650 times diluted seaweed fertilizer showed optimal results.Furthermore, different concentrations of seaweed fertilizers increased N harvest index in the aboveground parts of loquat seedlings and P harvest index in the roots of loquat seedlings. In addition, soil alkali-hydrolysed N,available P and available K contents increased and soil pH value decreased after spraying seaweed fertilizer.Correlation analysis revealed significantly positive correlations between loquat seedlings biomass and total N, P and K contents with soil alkali-hydrolysed N, available P and available K contents.The uptake and transport of N, P and K in loquat seedlings were enhanced by spraying seaweed fertilizer, the optimum concentration being 650 times dilution.

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Effect of comprehensive nutrient management model on yield and soil nutrient content of Vitis vinifera L.

LI Huoliang, HAN Kefeng

2024, 65 (3): 608-613. DOI: 10.16178/j.issn.0528-9017.20230304

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In order to study the application effects of bio organic fertilizer and specific water-soluble fertilizer on Vitis vinifera L., a 2-year (2020 and 2021) continuous plot experiment was conducted, with conventional fertilization as the control (FP treatment). The effects of bio organic fertilizer (SR treatment) and bio organic fertilizer+specific water-soluble fertilizer (ISSM treatment) on grape yield and soil nutrient content were studied. The results showed that the yield of ISSM treatment was significantly higher than other treatments for 2 consecutive years (P<0.05), with values of 11 985 and 10 939 kg·hm^-2, respectively. Compared with FP, ISSM treatment had the most significant increase in yield, with increases of 2 550 and 2 528 kg·hm^-2, respectively, and the yield increase rate reached 27.03% and 30.05%. In terms of soil nutrient content in vineyards, ISSM treatment has a significant effect on increasing soil pH, available phosphorus content, available potassium content, and exchangeable calcium and magnesium content, but its effect on increasing soil total nitrogen content and organic matter content is not significant. In terms of the correlation between soil nutrient content and yield of Vitis vinifera L., there are significant or extremely significant differences between the 2 a yield of Vitis vinifera L. and the soil available potassium content or exchangeable calcium content. Overall analysis shows that the combination of bio organic fertilizer and specialized water-soluble fertilizer (ISSM treatment) has the best effect.

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Effects of different tree shape of peach tree on fruit yield, quality and agricultural production cost in the mountainous areas of northern Zhejiang

LIU Jianwei, FANG Hanhan, NI Xiaoming, YU Xuan, XU Jie, NI Jianping, QIAN Yi, WANG Lifang, ZHU Luomei

2024, 65 (3): 614-617. DOI: 10.16178/j.issn.0528-9017.20231060

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Peach trees are the main economic fruit tree species planted in the mountainous areas of northern Zhejiang. The selection of tree shape has great significance for improving the yield, quality, and economic benefits of peach trees. This experiment aims to provide a basis for selecting tree shapes in mountainous areas by comparing “the traditional main branches of natural open center (open center shape)”and “main trunk shape”. The results showed that the main trunk shape harvested 8 days earlier than the open center shape, and the main trunk shape was put into production quickly, 60.6% higher compared with the open center shape on production in the third year; The main trunk shape was higher than the open center type in soluble solid content, but the open center shape fruit is more bright; The open center type was 1.95 times than the main trunk shape in pruning cost, while the open center shape was 2.48 times than the main trunk shape peach tree in the field management fee. The main trunk shape is mainly suitable for small machinery under mountainous conditions.

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Effects of different straw mulching patterns on the soil and fruit of peach orchards

SUN Qinan, ZHANG Shuo, ZHU Weijing, CHEN Miaojin, GU Qing, ZHANG Xiaobin

2024, 65 (3): 618-622. DOI: 10.16178/j.issn.0528-9017.20231023

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In order to widely promote and optimize the rice straw mulching technology of peach orchards in Ningbo City, and improve the economic benefits of planting peaches, rice straw mulching experiments were conducted. Four different rice straw mulching modes: thin mulching, thick mulching, thick mulching+ripening agent+urea, and no mulching control group were set up. The changes in soil physicochemical properties and fruit yield and quality of peach trees after straw mulching were analyzed and tested, and the benefits were evaluated based on technical costs and output values. The results showed that the high-quality fruit rate, fruit quality, and yield of the thick mulching group were improved, with an increase of 692 yuan per 667 m² compared with the control group, making it the optimal straw mulching mode. Although the benefits of thin mulching treatment have slightly decreased, there has been a significant improvement in important fruit quality indicators, which is also a good mulching mode. Rice straw mulching in peach orchards not only improves soil conditions, but also has a positive impact on the quality and yield of peach trees. It is a highly promotable peach tree planting and management technology. The results of this study can provide reference for further research and technical promotion of straw mulching models in peach orchards.

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Effects of different densities of degradable ground cloth on growth and soil properties of citrus sapling

LUO Yu, CHENG Luling, SUN Taian, DAI Suming, LI Dazhi

2024, 65 (3): 623-626. DOI: 10.16178/j.issn.0528-9017.20230898

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This study analyzed the effects of different densities(low density: 52 g·m^-2; medium density: 72 g·m^-2; high density: 82 g·m^-2) of degradable ground cloth on the growth and soil properties of citrus saplings with the aim of providing guidance on selecting suitable degradable ground cloth for citrus orchards. Results showed that low and medium density degradable ground cloth had no significant impact on above-ground plant growth or root distribution ratio at different soil depths but significantly reduced the total number of roots compared with the control treatment. In contrast, high-density degradable ground cloth significantly improved above-ground plant growth without decreasing the total number of roots but led to roots tending to be distributed in shallow soil layers (0-<20 cm depth). The three types of ground cloth didn't significantly affect soil bulk density, but increased water content in topsoil and decreased it in deep soil, which may have played a role in root distribution. Consequently, the study suggested using high-density degradable ground cloth in citrus orchards. Meanwhile, it was important that deep soil improvement should be conducted before covering the ground cloth to prevent root floating.

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Fig quality and safety production technology

ZHENG Ting, WEI Lingzhu, QIAN Jichang, CHENG Jianhui, XIANG Jiang, WU Jiang

2024, 65 (3): 627-632. DOI: 10.16178/j.issn.0528-9017.20221211

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In this paper, the high-quality and safe production technology of figs was reviewed, involving garden construction and facility selection, plastic pruning, soil and fertilizer management, pest control and seedling breeding, and the site selection requirements, pruning methods, common pests and diseases, soil improvement, irrigation and fertilization standards and commonly used seedling breeding methods in the production process of figs were elaborated, in order to provide reference for the standardized production practice of figs.

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Research on the potential application of herbaceous spontaneousplants based on landscape preference theory

WANG Bingyu, HAN Shuxian, GUO Tingting, BAO Zhiyi, SHI Yan

2024, 65 (3): 633-640. DOI: 10.16178/j.issn.0528-9017.20230362

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Herbaceous spontaneous plants can grow spontaneously in urban environments, which not only reduces maintenance and management costs, but also significantly enhances urban biodiversity. To explore the potential application of herbaceous spontaneous plants in urban greening, the article took landscape preference theory as the research basis, and uses habitat type, plant ornamental characteristics, and combination elements as factors for photo simulation. Questionnaire survey and field investigation were used, combined with on-site interview results for analysis. The research results indicated that there were a total of 212 species in 176 genera and 60 families of herbaceous autotrophic plants. After the introduction of herbaceous autotrophic plants, the overall popularity of the public had increased; Among the habitat types of herbaceous autotrophic plants, waterfront lawns had the highest preference; The preference for flowering species was the highest among plant species. By using appropriate design techniques, the preference for spontaneous foliage plants could be effectively enhanced; The aesthetic preferences of herbaceous plants were largely related to the social attributes of the public themselves. More ornamental species should be preserved in maintenance and management; The most suitable application scenario for herbaceous self growing plants was in forest grasslands; Control the height of leaf autotrophic plants below 30 cm; Foliage plants higher than 60 cm should be kept in the forest grassland; Enriching the species composition of autotrophic plant communities to achieve maximum ecological benefits. The conclusions and suggestions of this article can provide effective guidance for the promotion and application of herbaceous spontaneous plants, and provide reference for the future application practice of herbaceous spontaneous plants in urban greening.

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Effects of rearing condition on the survival of Acisoma panorpoides nymphs

HUANG Jingyi, ZHENG Kaidi, QIAO Jiajia, QIU Man, HAN Xiang, FENG Bo

2024, 65 (3): 641-646. DOI: 10.16178/j.issn.0528-9017.20234932

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In order to explore the indoor mass rearing condition of dragonflies, a class of insect resources with high exploitation value, the effects of rearing density, water quality, food, and the presence of dependents on the survival rate and the onset time of Acisoma panorpoides nymphs death were investigated in the study. The results showed that high-density rearing conditions accelerated the mortality of Acisoma panorpoides nymphs, and the survival rate of two nymphs group was significantly higher than that of the four nymphs and eight nymphs groups. The death time of eight nymphs was significantly earlier than that of four nymphs. The survival rate of nymphs in the daily water change group was significantly higher than that in the other day water changed group, and the death time of nymphs was significantly later than that in the other day water changed group. Compared with feeding mosquito larvae, feeding red worms could reduce the death of nymphs. The death time of nymphs fed with red worms was significantly later than that fed with mosquito larvae. When there were 8 nymphs, the survival rate of nymphs fed with red worms was significantly higher than that fed with mosquito larvae.The survival of nymphs was not significantly affected by the addition of attachments. Feeding density, water quality and food had significant effects on the survival of young nymphs. The best feeding conditions for young nymphs were as follows: 2 nymph in a group, changing the water every day and using red worms as food. Our results will lay a foundation for the breeding and utilization of dragonflies, including Acisoma panorpoides.

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Screening of indoor pesticides and evaluation of field control effectiveness for stem rot disease of Dioscorea esculenta

CHAI Rongyao, YOU Yuxin, QIU Haiping, NI Jianping, GUO Junning, ZHANG Zhen, LI Bin, SHEN Shengfa, WANG Yanli

2024, 65 (3): 647-651. DOI: 10.16178/j.issn.0528-9017.20230380

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In order to provide new ways for the prevention and control of stem rot disease in Dioscorea esculenta, this article conducts drug screening through indoor toxicity testing and field experiments to screen effective prevention and control drugs for stem rot disease of Dioscorea esculenta. Using the minimum inhibitory concentration method in the toxic medium method, the indoor toxicity of 19 pesticides was determined, and based on this, 6 pesticides with better control effects were selected for field control experiments. The results showed that bromonitrol had the strongest antibacterial effect in indoor toxicity testing, with a minimum effective concentration of 4.69 mg· L^-1, followed by thiamethoxazole, mesobiotin, amphotericin (kasumin), oxytetracycline, streptomycin sulfate, and amphotericin·thiazole zinc. The minimum effective concentrations of inhibition were 7.50, 18.25, 28.13, 37.50, 75.00 and 150.00 mg· L^-1, respectively. Among the six selected pesticides in the field experiment, amphotericin·thiazole zinc had the best control effect, with a control effect of 82.16%, followed by thiamethoxazole, mesobiotin, bromonitrol, and amphotericin·zhongshengmycin, with a control effect of 79.55%, 77.18%, 76.56%, and 75.02%, respectively. They can all be used as effective control agents for stem rot disease of Dioscorea esculenta in the field.

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Two kinds of intelligent monitoring and evaluation system to rice leaf roller Cnaphalocrocis medinalis and rice stem borer Chilo suppressalis

FANG Yunfeng, YAO Zhangliang

2024, 65 (3): 652-656. DOI: 10.16178/j.issn.0528-9017.20230914

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From 2019 to 2020, a study in Tongxiang City was conducted to compare intelligent pheromone monitoring, black light lamp monitoring with traditional monitoring methods for two pest species: Cnaphalocrocis medinalis and Chilo suppressalis. The results showed that in monitoring C.medinalis, black light intelligent monitoring was superior to both pheromone intelligent monitoring and traditional incandescent lamp monitoring. Compared with the traditional manual moth chasing, the trend was more consistent, and black light intelligent monitoring, to some extent, could replace manual monitoring. Additionally, it was observed that the number of adult C.medinalis of fourth (2) generation in the fields was higher than that under the black light, while the opposite was true for the fifth (3) generation. Over the past two years, both pheromone and black light monitoring effectively tracked the population dynamics of C.suppressalis. For C.suppressalis, there were significant annual variations in the population dynamics, but within the same year, the dynamics were consistent across different regions, despite significant differences in capture numbers. In conclusion, black light intelligent monitoring can be applied to monitor C.medinalis, and both pheromone monitoring and black light monitoring can effectively track the population dynamics of C.suppressalis, with the two methods complementing each other for effective monitoring.

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Effect of 9 herbicides on weed control effect and yield in single-cropping late rice direct seeding field

FU Sheng, REN Jie, YANG Fengli

2024, 65 (3): 657-660. DOI: 10.16178/j.issn.0528-9017.20230077

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In order to effectively control weeds in direct seeding paddy field and screen efficient and safe agents, 9 main weeds control agents were selected to carry out field control experiments, and the effects of these pesticides on yield were studied. The results showed that 4% biazole chlor SC, 40% benzylpyr propachlor WP, 25 g·L^-1 pentaflusulfam OD+300 g·L^-1 prochlor EC, 38% benzyl-ox-prochlor WP and 13% cyanofluoropyridine ester EC had good control effect. The control effect of total weed were more than 90% and the recovery rate of yield loss was more than 55% at 30 days after treatment. After 30 days of use of 17% pentafluoro·cyanofluoroxoxa, the control effect of weed fresh weight was 87.55%, and the recovery rate of yield loss was 56.13%. In terms of production, it is recommended to promote the application of the above 6 kinds of agents. 300 g·L^-1 prochlor EC, 10% oxazolamid EC, 30% cyanofluoxalate EC control effect and yield recovery effect are not ideal, and it is not recommended to promote the application.

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Weed community composition in the hilly wheat area of eastern Zhejiang Province

CAI Xinyi, XIANG Binghan, PAN Sufeng, YING Junjie, YAN Chengjin

2024, 65 (3): 661-666. DOI: 10.16178/j.issn.0528-9017.20230167

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In order to understand the occurrence types and community structure of weeds in wheat fields in the mountainous hills of northern Zhejiang, and to achieve sustainable management of weeds in wheat fields, a weed survey was carried out in Xianju County, a typical wheat area in the mountainous areas of northern Zhejiang, and community diversity and cluster analysis were carried out. The results showed that there were 34 species of weeds in the wheat field in Xianju County, belonging to 16 families, and the weeds with relative dominance greater than 10% were Alopecurus aequalis Sobol., Stellaria aquatica (L.) Scop., Cardamine hirsuta L. The diversity of 53 fields was studied, and the average Simpson index was 0.70, the Shannon-Wiener index was 1.53, the Pielou index was 0.74, and the Margalef index was 1.08. The results of cluster analysis showed that the weed community could be divided into four groups. The dominant species in group 1 were Alopecurus aequalis Sobol., Lepidium didymum L., Galium spurium L. The two dominant species in the group 2 were Geranium carolinianum L., Lepidium didymum L., Veronica polita Fries. The dominant species in groups 3 and 4 were Alopecurus aequalis Sobol., Stellaria aquatica (L.) Scop. and Cardamine hirsuta L., but there were differences in the relative dominance of the three weeds in these two groups. To sum up, the malignant weeds in Xianju are Alopecurus aequalis Sobol.and Stellaria aquatica (L.) Scop., and the regional malignant weeds are Cardamine hirsuta L., so it is advisable to choose three herbicides of fluthiachlor, methyl disulfuron, and thiophenesulfuron-methyl with weeding.

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Combined virulence of prothioconazole and fluazole hydroxylamine compounds against fusarium head blight

QI Yueyue, SHAO Yu, ZHANG Ping, HU Zonglin, NIU Jianguo, FENG Xingkai, HU Yongyang

2024, 65 (3): 667-671. DOI: 10.16178/j.issn.0528-9017.20230351

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The purpose of this study was to investigate the combined virulence of prothioconazole and fluazole hydroxylamine against fusarium head blight caused by Fusarium graminearum. In this study, the mycelial growth rate method was used to determine the indoor biological activity of prothioconazole and fluazole acylhydroxylamine against Fusarium graminearum, and to determine the optimal ratio of prothioconazole and fluazole acylhydroxylamine for the control of fusarium head blight. The results showed that the EC₅₀ levels of prothioconazole and fluazole acylhydroxylamine against fusarium head blight were 22.44 and 0.33 mg·L^-1. Among the three different ratios of prothioconazole and fluazole hydroxylamine, the EC₅₀ was the smallest at 2∶3, which was 0.19 mg·L^-1. The EC₅₀ value was the highest at 1∶1 ratio, which was 0.47 mg·L^-1. The results showed that the co-toxicity coefficients of prothioconazole and fluazole hydroxylamine were 137.54, 285.91 and 175.36, respectively, with the weight ratios of 1∶1, 2∶3 and 1∶2, respectively. All things considered, the best blending effect of prothioconazole and fluazole hydroxylamine at 2∶3 was the best. The control efficacy of 300, 400 and 500 mL·hm^-2 of 50% prothioconazole fluazole hydroxylamine suspension on fusarium head blight was 91.76%, 97.03% and 99.77%, respectively, after 25 days. 50% prothioconazole fluazole hydroxylamine suspension can prevent and control fusarium head blight, which is used in the early stage of fusarium head blight, applied twice, and the interval between the two applications is about 10-15 days.

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Comparison of the application effects of two kinds of immune inducers and conventional agents in wheat

ZHANG Fuqiang, ZHANG Hongjie, ZHANG Guo, YU Julong, WANG Junwen, QI Junsheng

2024, 65 (3): 672-675. DOI: 10.16178/j.issn.0528-9017.20221299

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In order to verify the effects of immune inducers on wheat growth, disease prevention, yield increase and quality improvement, the effects of VDAL, amino-oligosaccharides, conventional chemicals and blank control on wheat seedling quality, sheath blight control effect, gibberella control effect, yield and vomitoxin were studied by comparing the effects of vitamin oligosaccharides, conventional chemicals and blank control on wheat seed dressing and foliar spraying. The results showed that wheat seed dressing treatment with VDAL could significantly increase the root length of wheat and promote the production of secondary roots, the control effect of spraying immune inducers on sheath blight at the jointing stage of wheat was 83.33%, which was significantly better than that of conventional pesticides, and the control effect of spraying immune inducers on scab at the heading and flowering stage of wheat was 96.45%-98.05%, significantly reduced the production of deoxynivalenol. The use of immune inducers in combination with conventional pesticides at jointing stage and flowering stage could significantly increase the number of grains in wheat, and the yield was increased by 12.1%-13.7% compared with conventional agents alone. Immune inducers have high value in wheat applications.

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Effect of different types of flame guns on the weeding and insectcontrol effects of Chinese cabbage

FANG Shuli, REN Guohua, SHAO Yujing, NI Jinzhuang, BAI Songhua, ZHU Xuyan

2024, 65 (3): 676-679. DOI: 10.16178/j.issn.0528-9017.20230065

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In order to study the weeding and insect control effect of the flame gun, a single-head flame gun and a ten-head flame gun were used to carry out the weeding and insect control test of Chinese cabbage, and weeds, insect pests, Chinese cabbage seedlings and yield were investigated and compared. The results showed that the flame gun could burn the weed seeds on the soil surface, and the number of weeds was reduced, which needed to be combined with manual weeding, and was conducive to the abundant and stable yield of Chinese cabbage, could effectively prevent and control the occurrence of Phyllotreta striolata. Compared with the conventional treated weeding cabbage, the yield of the ten-head flame gun treated Chinese cabbage increased by 723 kg, the output value increased by 2 169 yuan, the benefit increased by 2 176 yuan. Compared with the chemical treatment, the yield of the ten-head flame gun treated Chinese cabbage increased by 58 kg, the output value increased by 174 yuan, the cost increased by 710.7 yuan, and the benefit decreased by 536.7 yuan. The weeding treatment of ten-head flame gun combined with insect net covering and rainproof cultivation can be used as one of the production technologies of organic cultivation of Chinese cabbage.

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Effects of 5 microbial treatments on growth and fruit quality of Cucumis sativus L.

ZHU Ming, ZHANG Yue, ZHANG Mingke

2024, 65 (3): 680-684. DOI: 10.16178/j.issn.0528-9017.20230345

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In order to better utilize microbial agents to improve the growth status and fruit quality of Cucumis sativus L., the cucumber variety Chunxiaquansheng was used as the experimental material. Five microbial agents, namely fluorescein, Bacillus subtilis, Judexing microbial agent, Caogen 8, and Shidifu, were used for substrate mixing and seedling cultivation, as well as root irrigation after planting, to explore their effects on the growth and fruit quality of Cucumis sativus L.The results showed that the root vitality, growth index, yield, and fruit quality of Cucumis sativus L. seedlings were most significantly improved under the treatment of Caogen 8 agent, which is suitable for cucumber production to improve economic benefits.

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Rapid determination of pentachlorophenol residues in honey by HPLC-MS/MS

ZHOU Tao, CHEN Zhimin, FU Lihong, WU Fangfang, WANG Huazhen, ZHU Liting, YE Yuqian, HUANG Meiying

2024, 65 (3): 685-688. DOI: 10.16178/j.issn.0528-9017.20230270

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A method for rapid determination of pentachlorophenol residues in honey by HPLC-MS/MS was established. The sample was extracted by ammoniated ethyl acetate (9∶1, V∶V), concentrated and determined by liquid chromatography tandem mass spectrometry, and quantified by internal standard method. Under the optimal conditions, the recovery ranged from 93.5% to 101.3% at the three spiked levels (0.5, 2.0 and 10.0 μg·kg^-1) and the relative standard deviations ranged from 4.30% to 6.82%. The limits of detection and quantification were 0.2 and 0.5 μg·kg^-1, respectively. This method is simple, fast, and reliable, and can be used to determine pentachlorophenol residues in honey.

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Measurement and correlation analysis of body size and slaughter performance of Wenling grass chickens

TAO Zhengrong, TU Bingjiang, GUO Rongbing, CAO Yongqing, YUAN Lingguang, CHEN Meiyan, ZENG Tao, TIAN Yong, LU Lizhi

2024, 65 (3): 689-692. DOI: 10.16178/j.issn.0528-9017.20230271

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Wenling grass chicken is a high-quality local breed in Zhejiang Province, which has the characteristics of good meat quality and good taste. In this study, a total of 15 male and female 300-day-old Wenling grass chickens were randomly selected to measure body size and slaughter performance, and to do correlation analysis. The results showed that Wenling grass chicken had larger breast depth, compact body shape and better slaughter performance. Tibial circumference was highly correlated with slaughter indexes. Except abdominal fat weight, there was a significant correlation between body size and slaughter indexes.

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Current situation, problems and countermeasures of marine ranch construction and management in Nanji Islands

XIAO Yunpu, XU Lili, CHEN Xiangao, CAI Houcai, YE Yongfeng

2024, 65 (3): 693-699. DOI: 10.16178/j.issn.0528-9017.20230279

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The Nanji Islands are one of the first national marine nature reserves established in China and the first marine type nature reserve to join the UNESCO World Biosphere Reserve. It is also one of the first national demonstration bases for promoting science and technology in the sea and the second batch of national marine ranch demonstration areas. Building marine ranches is a long-term direction for community economic development in protected areas, and has become an important model for coordinated development of protection and development. The article analyzed the current situation of construction and management of marine ranches in the Nanji Islands, pointed out the main problems and their causes, and proposed several countermeasures and suggestions from the perspectives of protection guidance, industrial integration, technological innovation, policy support, etc., which can provide reference for relevant departments and other similar regions to develop marine ranches.

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Hazards and prevention and control strategies of veterinary drug residues in livestock and poultry products

DENG Huidan, XIAO Yingping, YANG Weikang, WANG Wen, XIONG Lina, LYU Wentao, XIA Qiang, JI Xiaofeng, YANG Hua

2024, 65 (3): 700-705. DOI: 10.16178/j.issn.0528-9017.20230262

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With the development of intensive and large-scale animal husbandry, the production and sales volume of livestock and poultry products have also increased year by year. The problem of veterinary drug residues in livestock and poultry products has become a hot topic of widespread concern in the whole society. Veterinary drug is an important input in the process of animal husbandry, mainly used to prevent and treat animal diseases. If the use of veterinary drugs is unreasonable, it is easy to cause veterinary drug residues in livestock and poultry products, which will directly affect the quality, safety, and ecological health of livestock and poultry products, and may then threaten the human health of consumers. Based on this, the article reviewed the hazards of veterinary drug residues, the main causes of veterinary drug residues, and the prevention and control strategies for veterinary drug residues, providing technical support for ensuring the quality and safety of livestock and poultry products.

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Current situation, problems, and countermeasures of the operation mechanism of rural professional managers in Yuhang District, Hangzhou City

CUI Tinglu, WEN Lili, CHEN Pengfei

2024, 65 (3): 706-715. DOI: 10.16178/j.issn.0528-9017.20231029

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Yuhang District of Hangzhou City pioneered the operation mechanism of rural professional managers included in financial budget subsidies in 2019. The article was based on field visits and research in rural areas of Yuhang District and the rural professional manager group surrounding its collective economy. It analyzed the problems of incomplete screening system, inadequate resource allocation, and inadequate performance evaluation in this mechanism. Drawing on theoretical ideas such as human capital, performance management, and enterprise life cycle, the paper explored the mechanism of this mechanism in promoting the revitalization of rural collective economic organizations. It proposed a discussion on the composition of the four circles in rural areas of Yuhang District and the classification of six types of managers. Improvement measures were proposed from the aspects of improving systems, optimizing governance, and improving assessment.

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Development of intelligent monitoring system of family miniature farm

LUO Fei, XU Haibin

2024, 65 (3): 716-720. DOI: 10.16178/j.issn.0528-9017.20230376

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In order to promote the development of urban agriculture and balcony agriculture, an intelligent monitoring system for family miniature farm based on the internet of things was designed, which was composed of farm microclimate environment information collection system, video monitoring, networking and data transmission, farm measurement and control system, storage terminal, and realized the remote transmission of the environmental information data and image data of the family miniature farm. Users can access the farm information remotely through the PC terminal service component or mobile terminal service component in any place with network coverage.

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Development and application of one-stop tobacco farmer service platform

SHAO Xiaodong, GAO Song, MA Shiquan, LIU Shuai, CHEN Dong, MEI Yuting, SHI Xu, LI Zhenshou, ZHANG Tiehuai, GUO Jian, CHEN Tianen, ZHANG Chi, CHEN Yang, XU Xiangqi, YANG Wei, CHEN Feng

2024, 65 (3): 721-727. DOI: 10.16178/j.issn.0528-9017.20230010

Abstract ( 108 )

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In view of the current problems of low service efficiency and low level of standardization in the tobacco agricultural industry, high production and operation costs of tobacco farmers, untimely information acquisition, and low integration of production, life and ecology in tobacco areas, the study constructed a one-stop agricultural service digital service platform. The platform aimed to serve farmers, used new formats and models of internet economy, integrates tobacco farmers, cooperatives, and third-party institutions, and explored and constructs a "Didi Agricultural Service" service matching model. The platform adopted a multi-layer distributed architecture, with a hierarchical and component-based design method, and selected the B/S architecture, which was composed of five levels, including the basic layer, the data layer, the business layer, the access layer and the user layer, and realized the six functions of policy publicity, business handling, tobacco planting policy, professional services, agricultural services, and technical services, and was applied and promoted in Honghe Prefecture, Yunnan Province. Until November 2021, there were 41 800 registered tobacco farmers and 55 merchant users (including 31 tobacco farmer cooperatives providing professional services), with a total of 427 000 transactions and a transaction volume of 179 million yuan, and the planting cost of 667 m² in the promotion area decreased by 50.48 yuan year-on-year, effectively reducing the planting cost of tobacco farmers. Through the exploration and application of this study, four types of digital service systems have been formed, including professional services, policy services, agricultural services, and technical services, which provide high-quality and convenient production and living services for rural households based on big data, and bridge the digital divide between urban and rural areas.

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Research on industrial development and innovation models of digital countryside in Hangzhou City

XU Rui, WANG Xueqin

2024, 65 (3): 728-732. DOI: 10.16178/j.issn.0528-9017.20230687

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The rural revitalization strategy is an important foundation for building a modern economic system in China, and the digitization of rural industries is the only way to achieve rural revitalization. Taking Hangzhou City, Zhejiang Province as the research object of digital rural construction, digital technologies such as 5G communication, Internet of Things, and big data were integrated into rural life, promoting the development of rural digital industries and enhancing the modernization process. The article analyzed and studied the construction of digital rural information infrastructure, rural digital industry development, rural digital cultural literacy, rural digital medical services, and digital rural tourism in Hangzhou. It proposed that digitalization should strengthen the modern development of rural industries, narrow the urban-rural gap to drive rural employment, and build ecological harmony digital rural construction to provide reference for the development of digital countryside.

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