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Environmental regulation, spatial spillover, and agricultural green total factor productivity: an analysis based on panel data from the Yangtze River economic belt ZHANG Hang, KONG Lingcheng Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 271-280.   DOI: 10.16178/j.issn.0528-9017.20250531 Abstract （242）   HTML （1107296256）    PDF （1238KB）（247）       Knowledge map    This study is based on the theory of spatial spillover effects and uses panel data from 11 provinces and municipalities in the Yangtze River economic belt from 2007 to 2023 to systematically investigate the intrinsic relationship and mechanisms between environmental regulation and agricultural green total factor productivity. The research employs the entropy method to measure the intensity of environmental regulation, utilizes the super-efficiency SBM-GML model to assess agricultural green total factor productivity, and applies a two-way fixed effects spatial Durbin model to analyze spatial spillover effects. The results indicate that environmental regulation in the Yangtze River economic belt not only has a significant positive promoting effect on agricultural green total factor productivity in the local region but also exhibits clear spatial spillover effects. Furthermore, its impact shows spatial heterogeneity and is significantly constrained by the level of regional economic development. Based on these findings, the Yangtze River economic belt should scientifically leverage the restraining and incentivizing effects of environmental regulation, foster new quality productive forces in agriculture by enhancing technological innovation, implement differentiated and dynamic environmental regulation policies tailored to local conditions, strengthen regional coordination, and promote cross-basin joint pollution prevention and control. Table and Figures | Reference | Related Articles | Metrics

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Effect of variable temperature spreading processing on the flavor and quality of Longjing tea CUI Hongchun, YU Jizhong, SHI Daliang, ZHANG Jianyong, WANG Feng, ZHANG Zaiqing Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 148-155.   DOI: 10.16178/j.issn.0528-9017.20240709 Abstract （187）   HTML （5）    PDF （6370KB）（322）       Knowledge map    Spreading is the first key process in the processing of Longjing tea, and is the cornerstone of the good flavor quality formation of Longjing tea. In this study, Longjing tea was processed using four different spreading methods: “traditional room temperature” spreading (CK), “room temperature+refrigeration+room temperature” variable temperature spreading(V1), “room temperature+refrigeration+freezing+room temperature” variable temperature spreading (V2), and “room temperature+freezing+room temperature” variable temperature spreading (V3). Through comparative analysis of sensory quality and flavor chemical contents, as well as the correlation between sensory evaluation scores and flavor chemical contents, the effect of variable temperature spreading treatment on the flavor quality of Longjing tea was explored. The results showed that the sensory evaluation scores of Longjing tea processed by V1, V2, and V3 were higher than those of CK. The V1, V2, and V3 had better qualities than CK in terms of flatness and uniformity in appearance, brightness in soup, aroma persistence, and mellow taste. Moreover, the sensory quality of Longjing tea processed by V3 was relatively the best. The contents of tea polyphenols, water extracts, catechins in V1, V2, and V3 was significantly (p<0.05) higher than that in CK, while those in V3 was significantly higher than those in V1 and V2, which was consistent with the trend of changes in sensory evaluation scores. The contents of free amino acids in V2 and V3 was significantly higher than that in CK and V1. The caffeine content of V1, V2, and V3 was significantly higher than that of CK, while there was no significant difference in caffeine content among V1, V2, and V3. Compared with CK, V1, V2, and V3 had higher contents of EGCG, EGC, and GCG, while V1, V2, and V3 had lower contents of ECG, CG. Compared with CK and V1, V2 and V3 had higher contents of EC, C, and GC. The GC,EGCG,C,EC,free amino acids, tea polyphenols, and water extracts were the main flavor quality contributing substances of Longjing tea. Freezing had a greater effect on the flavor quality of Longjing tea after spreading than refrigeration. The variable temperature spreading process has significantly improved the flavor and quality of Longjing tea, providing technical support and theoretical basis for the formation and regulation of Longjing tea quality research. Table and Figures | Reference | Related Articles | Metrics

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Mitigative effect of exogenous choline chloride on wheat seedlings under drought stress ZHANG Jinrui, LIU Zeliang, LUO Lei, PU Kairui, WANG Fei, JIANG Zihang, WANG Huadun, CHEN Xinhong, ZHANG Linqing Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 18-25.   DOI: 10.16178/j.issn.0528-9017.20240670 Abstract （271）   HTML （11）    PDF （4202KB）（302）       Knowledge map    In order to investigate the effects of exogenous choline chloride on the growth and physiological characteristics of wheat seedlings under drought stress, Huaimai 35 and Zhengmai 9023 were selected as materials. The pot experiment method was adopted, and a 15% PEG-6000 solution was regularly irrigated to simulate a drought environment. 400 mg·L-1 choline chloride was sprayed on the leaves to treat the wheat seedlings. The alleviating effects of choline chloride on the growth and physiological characteristics of wheat seedlings under drought stress were analyzed. The results showed that under drought stress, the growth and development of wheat seedlings were inhibited. There were significant decreases in the number of tillers, leaves, roots, the longest root length and water content, and the root-shoot ratio significantly increased. Meanwhile, the activities of superoxide dismutase (SOD), peroxidase (POD), as well as the contents of proline and malondialdehyde (MDA), were significantly increased. After treatment with 400 mg·L-1 choline chloride, the activities of SOD, POD, and catalase (CAT) in wheat seedlings under drought stress were significantly increased, the scavenging ability of reactive oxygen species was greatly enhanced. Meanwhile, the content of MDA was significantly reduced, the content of proline was significantly increased, and the osmotic regulation ability of plants was strengthened. In terms of external morphology, it was manifested as a significant increase in the number of tillers, leaves, the longest root length, water content and a significant decrease in root-shoot ratio. The above results indicated that choline chloride can effectively alleviate the adverse effects of drought stress on the growth of wheat seedlings. Table and Figures | Reference | Related Articles | Metrics

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Research progress on biological control of Cytospora canker SHE Wenjing, NING Wanjun, LIU Zheng, HUANG Minmin, WANG Baoqing, NIU Ben, ZHANG Qiang, WU Di Journal of Zhejiang Agricultural Sciences    2026, 67 (3): 813-820.   DOI: 10.16178/j.issn.0528-9017.20250095 Abstract （52）   HTML （2013265919）    PDF （490KB）（127）       Knowledge map    Cytospora canker，a plant disease caused by fungi of the genus Cytospora，is characterized by strong transmissibility and wide-ranging impact. It not only disrupts ecological balance but also inflicts significant economic losses on the forestry industry. As a green and sustainable disease management strategy，biological control has garnered widespread attention in recent years. This paper reviews the types of biocontrol microorganisms，their mechanisms of action，and integrated management strategies against Cytospora canker，aiming to provide theoretical guidance and practical references for the biological control of this disease. Table and Figures | Reference | Related Articles | Metrics

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Zhejiang's practice and enlightenment of promoting rural revitalization through regional cluster development HU Bao, GU Yikang Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 1-4.   DOI: 10.16178/j.issn.0528-9017.20250981 Abstract （286）   HTML （24）    PDF （1096KB）（287）       Knowledge map    The Fourth Plenary Session of the 20th Central Committee of the Communist Party of China proposed advancing rural revitalization through a regional cluster approach. As a pioneering region in exploring and practicing rural regional cluster development, Zhejiang has achieved remarkable results by adhering to the concepts, methods, and mechanisms embodied in the “Green Rural Revival Program”. By reviewing the overall practice of rural regional cluster development in Zhejiang, this paper analyzes the effective starting point of comprehensive land improvement across the province and the strong driving force for the development of its mountainous and island counties. It offers insights and suggestions for further advancing regional cluster development, including applying the concepts, methods, and mechanisms of the “Green Rural Revival Program”, optimizing the top-level design of regional cluster development, and actively promoting the new “trinity” model of attracting young talent back to rural areas, enhancing rural operations, and achieving rural prosperity and farmer enrichment. Reference | Related Articles | Metrics

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Comprehensive quality evaluation of japonica rice based on principal component and cluster analysis LYU Jingfang, SUN Qiumin, DAI Fen, ZHU Zuoyi Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 26-33.   DOI: 10.16178/j.issn.0528-9017.20240835 Abstract （230）   HTML （9）    PDF （3089KB）（271）       Knowledge map    With the rapid development of modern agriculture, the demand for high-quality rice production and consumption has been increasingly growing, becoming an urgent requirement for the current rice industry development. This study employed principal component analysis (PCA) to comprehensively evaluate 12 quality indicators of 31 japonica rice varieties from Shangyu region of Zhejiang Province, and utilized cluster analysis for systematic classification. The results showed that there were significant differences in various quality indicators among different japonica rice varieties in Shangyu, with varying degrees of correlation observed between indicators. Among them, the coefficients of variation for chalkiness degree and chalky grain rate were the highest across all quality indicators, and amylose content showed a highly significant positive correlation with chalky grain rate. The four principal components extracted by PCA reflected appearance quality, processing quality, nutritional quality, and eating/cooking quality, respectively, providing an effective basis for comprehensively evaluating the quality of different rice varieties. Comprehensive analysis revealed that Nangeng 46, Xiushui 1717, and Jia 67 performed excellently in multiple quality indicators, ranking in the top three overall. Furthermore, cluster analysis divided the 31 varieties into three groups and the 12 indicators into three groups, with significant correlations observed between variety clustering and quality indicator clustering. This study establishes a reliable technical foundation for rice quality assessment, systematic evaluation, and scientific classification. Table and Figures | Reference | Related Articles | Metrics

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Breeding and cultivation of the autumn soybean cultivar Zheqiu 6 YANG Qinghua, YUAN Fengjie, JIN Hangxia, YU Xiaomin, LI Xiaoying, FU Xujun Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 43-46.   DOI: 10.16178/j.issn.0528-9017.20240942 Abstract （347）   HTML （1）    PDF （1095KB）（260）       Knowledge map    Zheqiu 6, a new autumn soybean cultivar, was developed by Institute of Crops and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, using conventional hybridization breeding methods. It was approved by the Zhejiang Provincial Committee for the Approval of Major Crop Varieties in 2023, with the approval number Zheshendou 2023005. This cultivar is characterized by high yield, strong resistance, and superior quality. Zheqiu 6 features elliptical seeds with yellow seed coats and brown hilums, and exhibits a determinate growth habit. Its average growth period is 100.7 d, with a plant height of 93.8 cm, 17.6 main stem nodes, 2.6 effective branches per plant, 51.6 effective pods per plant, 1.9 seeds per pod, and a 100-seed weight of 27.0 g. The grain contains 42.3% protein and 20.7% oil. For disease resistance, artificial inoculation tests showed that Zheqiu 6 was highly resistant to both SC15 and SC18 strains of soybean mosaic virus in 2021, and resistant to both strains in 2022; for anthracnose, it showed resistance in 2021 and moderate resistance in 2022. Regarding yield performance, Zheqiu 6 achieved an average yield of 191.2 kg per 667 m2 in the 2021-2022 Zhejiang Provincial Regional Trials for autumn soybean, and 177.5 kg per 667 m2 in the 2022 Zhejiang Provincial Production Trials for autumn soybean. Table and Figures | Reference | Related Articles | Metrics

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Effects of different photovoltaic panel layouts on wheat yield and quality GONG Jianhui, ZHANG Long, WU Cuinan, WANG Li, DENG Li, BAO Encai Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 11-17.   DOI: 10.16178/j.issn.0528-9017.20240556 Abstract （261）   HTML （9）    PDF （4502KB）（258）       Knowledge map    To investigate the effects of photovoltaic array shading in agrivoltaic system on wheat yield, grain quality, and processing quality, a field experiment was conducted using the wheat cultivar Huaimai-33. Five treatments were applied: single-row adjacent panels (T1), single-row panels with east-west intervals (T2), double-row panels with east-west intervals and north-south adjacency (T3), double-row panels with intervals in both east-west and north-south directions (T4), and a control without photovoltaic panels (CK). The results showed that compared with CK, wheat yields under the four shading treatments were significantly (p<0.05) decreased by 35.34%, 30.08%, 19.05%, and 28.57% for T1 to T4, respectively, with the T3 treatment maintaining over 80% of the CK yield. In terms of quality, the T3 treatment performed optimally. Integrated assessment of agricultural and power generation benefits confirmed T3 as the optimal scenario. In summary, the T3 layout supports green, efficient, and stable wheat production in agrivoltaic systems, effectively balancing agricultural and photovoltaic power generation benefits, and provides a theoretical basis for the planning and design of wheat production in photovoltaic bases in Jiangsu Province. Table and Figures | Reference | Related Articles | Metrics

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Temporal dynamics of major insect pests in early season rice and their key meteorological driving factors in Zengcheng, Guangdong CUI Can, QIAN Linghan, GUAN Yun, WU Yanzhou, ZHANG Hualu, ZHONG Yingmei, LAI Weizhao, LI Shenlei Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 125-135.   DOI: 10.16178/j.issn.0528-9017.20250677 Abstract （172）   HTML （3）    PDF （1885KB）（258）       Knowledge map    This study aimed to investigate the driving mechanisms of meteorological factors on the population dynamics of major early rice pests (Chilo suppressalis, rice planthoppers, and Cnaphalocrocis medinalis) in the Zengcheng area, to provide a theoretical basis for regional precision pest control. During the early rice growing season (March-July) of 2024-2025, smart pest forecasters and microclimate monitoring stations were deployed in Zhucun Sub-district, Zengcheng District, Guangzhou City, to systematically monitor pest population numbers and ten meteorological factors, enabling an in-depth analysis of their relationships. The results revealed significant interannual divergence in the population dynamics of all three pests. Chilo suppressalis exhibited a substantially higher outbreak intensity in 2025, with its first peak occurring 7 days earlier, a 2.79-fold increase in abundance, and the highest peak surging 11.06-fold with a duration prolonged by 5 days compared with 2024. Rice planthoppers displayed a “peak inversion” pattern: the early peak abundance in 2025 decreased by 70.63%, the outbreak was delayed until the wax-ripening stage, and the peak value increased by 17.35 times compared with 2024. Cnaphalocrocis medinalis showed an overall population decrease of 69.83% in 2025, and its first population peak shifted 12 days earlier to the late tillering stage. The outbreaks of all three pests were regulated by specific meteorological cascade effects. Specifically, the “low-baseline, high-outbreak” interannual pattern of Chilo suppressalis was primarily driven by the synergistic effects of extreme temperature events and precipitation variability; the “annual peak inversion” of rice planthoppers was controlled by the synergistic interaction between precipitation patterns and wind speed thresholds; and the “marked interannual differences” in Cnaphalocrocis medinalis populations were mainly driven by extreme temperature thresholds and synergistic interactions among high temperature, rainfall, and wind. Based on these findings, we recommend that precision pest control practices for early rice in Zengcheng prioritize monitoring the trends of meteorological factors highly correlated with specific pests and conduct comprehensive analyses of the dynamic evolution of key synergistic meteorological factors, thereby optimizing the timing strategies for precision pest control in the Zengcheng rice area. Table and Figures | Reference | Related Articles | Metrics

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Breeding，characteristics，and extension of the high⁃quality late japonica rice variety Xiushui 121 ZHANG Yonggen, YAO Haigen, ZHANG Shixi, ZHANG Haipeng, WANG Yeqing, SHEN Xian, YAO Jian Journal of Zhejiang Agricultural Sciences    2026, 67 (2): 293-297.   DOI: 10.16178/j.issn.0528-9017.20240980 Abstract （146）   HTML （11）    PDF （450KB）（243）       Knowledge map    The late japonica rice variety Xiushui 121 was developed by Jiaxing Academy of Agricultural Sciences in Zhejiang Province through hybridization of Xiushui 134//Xiushui 134/GF6. It was approved by Shanghai Main Crop Variety Approval Committee in 2015（Hushendao2015005）and has been introduced and promoted in four provinces including Zhejiang Province（Zheyinzhong2017001），Anhui Province（Wanyindao2018117），Hubei Province（Eyinzhong2019087），and Jiangsu Province（Suyinzhong2020036），demonstrating wide adaptability. This variety has the characteristics of moderate growth period，green stem at maturity，strong stress resistance，excellent grain quality，stable yield performance，and high productivity. It is widely used in branded high-quality rice processing and the "Five-Excellence Linkage" contract grain production program，and has been consecutively listed as a leading crop variety in Zhejiang Province for six years（2019-2024）. This paper summarizes the breeding process，characteristics，high-yield cultivation techniques，and promotion and extension of Xiushui 121. Table and Figures | Reference | Related Articles | Metrics

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Effects of chemical fertilizer reduction combined with different fertilizers on strawberry growth and soil fertility YING Xiao, XU Wei, CHEN Wei Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 216-221.   DOI: 10.16178/j.issn.0528-9017.20250118 Abstract （166）   HTML （3）    PDF （1937KB）（254）       Knowledge map    A field experiment was conducted to study the effects of chemical fertilizer reduction combined with different fertilizers on strawberry fruit quality and soil fertility in greenhouse in Jiashan City. The results showed that the application of urease-inhibiting slow-release fertilizer, biological fertilizer and organic fertilizer could greatly improve the yield and quality of strawberry under the condition of reducing nitrogen content by 20% with conventional base fertilizer, and the urease-inhibiting slow-release fertilizer performed the best, and the three new fertilizers can increase the soil nutrient contents, and the application of commercial organic fertilizer had the best effect. Totally, appropriate reduction of chemical fertilizer combined with urease-inhibiting slow-release fertilizer, biological fertilizer and commercial organic fertilizer could effectively maintain the supply of soil nutrients, promote the growth of strawberry, and improve fruit quality. Table and Figures | Reference | Related Articles | Metrics

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Effects of compound fertilizer combined with different soil amendments on corn growth and coastal saline-alkali soil improvement CHEN Yue, XUE Zhizhong, FENG Wei, MENG Ran, WU Zhe, LU Xuelin Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 211-215.   DOI: 10.16178/j.issn.0528-9017.20250103 Abstract （226）   HTML （1）    PDF （1126KB）（249）       Knowledge map    To improve the physicochemical properties of coastal saline-alkali soil and enhance the quality of arable land in Hebei Province, this study focused on the coastal saline-alkali soil in Tangshan City, Hebei Province. Through field experiments, the effects of compound fertilizer combined with different soil amendments on corn growth and saline-alkali soil improvement were investigated. The experiment included seven treatments: a control group (CK) and six treatments with varying amounts of soil amendments. Changes in corn agronomic traits, soil salinity, pH value, and soil nutrient content were analyzed. The results showed that the application of compound fertilizer combined with soil amendments effectively reduced soil salinity, regulated pH value, increased soil nutrient content, and promoted corn growth and yield. The effects of different soil amendments varied, with 600 kg·hm-2 of conventional compound fertilizer combined with 375 kg·hm-2 of Liangtianbao showing the best overall performance, making it suitable for promotion and application in coastal saline-alkali soils in Hebei Province. This study provides a scientific basis and practical reference for saline-alkali soil improvement and sustainable agricultural development. Table and Figures | Reference | Related Articles | Metrics

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Experiment on the input-output ratio of late-sowing and weak wheat seedling in Puyang City YUE Yunxia, QIN Haiying, CHENG Xing, ZHANG Yingying, XIE Wenfang, WANG Wenjuan, DAI Miaofei, SHENG Shipeng Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 34-38.   DOI: 10.16178/j.issn.0528-9017.20250016 Abstract （192）   HTML （3）    PDF （1105KB）（252）       Knowledge map    Since July 2021, Puyang City has been affected by multiple rounds of heavy rainfall and other factors, resulting in a general delay of about 15 days in wheat sowing. Late-sowing wheat accounts for a large proportion of the area. Through investigation and analysis of tillering, population, yield, and input-output ratio of late-sowing wheat in Wusizhuang Village, Fanxian County, Puyang City, this study explores remedial measures suitable for promoting weak seedling wheat growth in Puyang City, and identifies economically reasonable nitrogen fertilizer application rates to balance agricultural input costs and actual output. Therefore, a late sowing wheat input-output ratio experiment was conducted in Puyang City. The experimental results showed that late sowing had a significant impact on the number of spikes, number of grains per spike, 1 000 grain weight, and yield of wheat. In practical production, late sowing should be avoided as much as possible. In case of human uncontrollable factors causing late sowing, 187.5-247.5 kg·hm-2 urea and 75 kg·hm-2 diammonium phosphate can be applied during the greening period, and 307.5 kg·hm-2 urea can be applied during the jointing period to increase the number of spikes, number of grains per spike, and 1 000 grain weight of late-sowing weak wheat seedling, thereby improving wheat yield and increasing income. Table and Figures | Reference | Related Articles | Metrics

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Accurate exploration of citrus tetraploid based on morphological characteristics of seedling fibrous roots WANG Ping, KE Fuzhi Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 62-66.   DOI: 10.16178/j.issn.0528-9017.20240725 Abstract （171）   HTML （5）    PDF （2089KB）（243）       Knowledge map    Citrus tetraploid resources can provide new germplasm for triploid hybrid parents and stock genetic improvement. In this study, a simple method was established to accurately explore citrus tetraploid, which involves densely sowing diploid citrus seeds in a vermiculite substrate to germinate and form seedlings. After the seedlings have fully developed their fibrous roots, the plants with significantly short and thick fibrous roots are observed with the naked eye as tetraploid citrus. By using this method, we screened 8, 6, 8, 7, 4 and 1 putative tetraploids respectively from 616, 354, 476, 536, 648 and 289 seedlings of Citrus aurantium cv. Goutoucheng, Citrus aurantium cv. Changshanhuyou, Citrus paradisi Macf., Citrus sinensis×Poncirus trifoliata, Poncirus trifoliata Raf., Citrus reticulata Blanco cv. Succosa. All the tetraploids were confirmed by flow cytometry, and the screening accuracy rate of morphological characteristics reached 100%. The tetraploid population detection rates of the above six varieties were 1.30%, 1.69%, 1.68%, 1.30%, 0.62% and 0.35%, respectively. This method has a high detection rate and is easy to operate, which achieves 100% screening accuracy and completes the work of tetraploid breeding without the condition of ploidy identification instrument. Table and Figures | Reference | Related Articles | Metrics

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Effects of tea addition methods on the quality of Longjing wheat tea beer DING Xiaoyan, WANG Lianxing, ZOU Chun, JIA Yunyao, LI Xishu, CAO Ting, WANG Xuewei, YIN Junfeng Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 156-160.   DOI: 10.16178/j.issn.0528-9017.20240893 Abstract （239）   HTML （1）    PDF （1657KB）（234）       Knowledge map    In order to investigate the effects of tea addition methods on the quality of Longjing wheat tea beer, this study compared the effects of two tea addition methods, high-temperature tea extraction (Group B) and low-temperature tea extraction (Group C), on beer sugar content, pH value, alcohol content, various catechin content, caffeine content, and sensory quality using wheat beer without tea addition (Group A) as the control. The results indicated that adding tea had no effect on sugar content, pH value, and alcohol content during beer fermentation. The total catechin contents of Group B was the highest, reaching 229.8 mg·L-1, which was 99.9- and 1.2- folds that of Group A and Group C, respectively. No caffeine was detected in Group A, while Group B had the highest caffeine content, reaching 19.5 mg·L-1, which was 2.6-folds that of Group C. In terms of sensory quality, the group C samples scored the highest in aroma, taste, and tea flavor, with malt flavor second only to the group A samples. Therefore, adding tea can increase the type of catechins, increase the total catechin contents and caffeine content in beer, and low-temperature tea extraction is more conducive to improving the sensory quality of Longjing wheat tea beer. The results of this study provide reference for the preparation and quality improvement of tea beer products. Table and Figures | Reference | Related Articles | Metrics

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Evolution characteristics and improvement technology research progress of soil acidification in southern China from 1950 to 2020 NI Jinyang, WANG Feng, YU Qiaogang, ZHOU Jun, SUN Wanchun, MA Shitai, LYU Yongjie, MA Junwei Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 231-242.   DOI: 10.16178/j.issn.0528-9017.20240775 Abstract （199）   HTML （7）    PDF （1439KB）（238）       Knowledge map    Since the 1950s, the area of acidic soils in southern China has significantly increased, leading to increasingly severe adverse effects on soil fertility, crop growth, yield and quality, food security, agricultural economy, and the ecological environment. In southern China, heavy and concentrated rainfall leads to severe land erosion and nutrient leaching, resulting in significant loss of alkaline soil components such as calcium, magnesium, and potassium. The combined effects of acid rain caused by industrial production and improper farming practices in agricultural activities further exacerbate soil acidification in southern China. This paper provided a detailed analysis of the characteristics of soil acidification in southern China across different historical periods, from the perspectives of temporal development and regional differences. It summarized the control and mitigation technologies for soil acidification, along with advancements in related research fields, and forecasted future research trends in soil acidification. The aim is to support in-depth exploration of the formation mechanisms of soil acidification, optimization of predictive models, and the promotion of effective soil acidification management methods, thereby effectively curbing and reversing the trend of soil acidification. Table and Figures | Reference | Related Articles | Metrics

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Effects of Brassica campestris var. parachinensis-maize rotation on microbial biomass and enzyme activity in rhizosphere soil HU Qiqi, LIANG Jiawei, YU Weimin, WANG Rongping, GONG Beini, LIN Birun Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 184-193.   DOI: 10.16178/j.issn.0528-9017.20240822 Abstract （166）   HTML （1）    PDF （1858KB）（233）       Knowledge map    This study took rhizosphere soil as the research object, and set up Brassica campestris var. parachinensis rotation and non-rotation treatments to analyze the changes in soil organic matter content, soil available phosphorus content, soil microbial biomass phosphorus (SMBP) content, soil acid phosphatase activity, and soil microbial biomass carbon (SMBC) content during the rotation cycle. Pearson method was used to analyze the correlation between each indicator. The results showed that the organic matter content, available phosphorus content, SMBP content, and acid phosphatase activity in rhizosphere soil of the Brassica campestris var. parachinensis-maize rotation treatment were significantly (p<0.05) higher than those of the non-rotation treatment during the crop planting period, while the SMBC/SMBP ratio was lower than that of the non-rotation treatment, with a ratio below 30. Soil available phosphorus content was extremely significantly (p<0.01) positively correlated with SMBP content, soil acid phosphatase activity, SMBC content, and soil organic matter content with correlation coefficients of 0.869, 0.815, 0.611, and 0.441, respectively. However, it was significantly negatively correlated with SMBC/SMBP ratio and soil pH value, with correlation coefficients of -0.397 and -0.850, respectively. Rotation significantly activated soil phosphorus cycling, promoted crop utilization of phosphorus in the soil, achieved balanced-nutrient absorption, and balanced agricultural production and soil cultivation. Table and Figures | Reference | Related Articles | Metrics

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Effects of rice-crayfish rotation on soil physicochemical property and bacterial diversity in paddy fields CUI Yanna, HAO Guijie, WANG Yuchen, SUN Boyi, TONG Yuhao, ZHU Yanyu, WANG Min, FANG Qihang, SHI Xumei, LOU Yidi, ZHU Xinding, TU Jinyu, ZHANG Haiqi, YANG Huangzhen Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 202-210.   DOI: 10.16178/j.issn.0528-9017.20240886 Abstract （157）   HTML （3）    PDF （5906KB）（236）       Knowledge map    To investigate the effects of different one-year breeding densities and different stages of rice-crayfish rotation on soil physicochemical properties and soil bacterial diversity, nine fields of similar area were selected for rice-crayfish rotation. Three breeding densities were set, with three parallel fields for each density. Soil samples were collected before, during, and after the rice-crayfish rotation to determine soil physicochemical properties and bacterial diversity. The results showed that the breeding density of crayfish had no significant effect on soil pH value, bulk density, particle density, organic matter content, total nitrogen content, available phosphorus content, available potassium content, total porosity, or soil bacterial diversity. During the rice-crayfish rotation period, there were no significant differences in soil organic matter content and total nitrogen content; however, significant differences were observed in pH value, bulk density, particle density, available phosphorus content, available potassium content, and total porosity. pH value and particle density showed no significant change in the early and middle stages, but in the late stage, pH value decreased significantly by 11.5%, and particle density significantly increased by 4.28%. Bulk density, available potassium content, and total porosity showed significant differences across the early, middle, and late stages. Bulk density firstly increased and then decreased, available potassium content showed a gradual decreasing trend, while total porosity firstly decreased and then increased. Available phosphorus content significantly decreased by 38.0% in the middle stage and then stabilized. During the rice-crayfish rotation, the species richness of soil bacteria significantly changed across the early, middle, and late stages, showing an increasing trend. There was no significant difference in soil bacterial species diversity between the early and middle stages; however, compared to the early and middle stages, bacterial diversity significantly increased in the late stage. This indicates that rice-crayfish rotation can increase the species richness and diversity of soil bacteria. During the rotation, the correlation between soil physicochemical indicators and bacterial diversity followed clear patterns: available phosphorus and available potassium contents mainly affected soil bacterial diversity in the early stage, showing a positive correlation; pH value and bulk density mainly affected soil bacterial diversity in the middle stage, showing a positive correlation; total porosity and particle density mainly affected soil bacterial diversity in the late stage, showing a negative correlation. The results can provide a reference for the development of the rice-crayfish rotation industry. Table and Figures | Reference | Related Articles | Metrics

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Introduction and cultivation experiment of Tainong 1 and Qinmi 9 passion fruits in Yongkang City, Zhejiang Province LI Jinchao, ZHU Qibiao Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 82-85.   DOI: 10.16178/j.issn.0528-9017.20250447 Abstract （262）   HTML （11）    PDF （1102KB）（233）       Knowledge map    Based on the introduction and cultivation experiments of Tainong 1 and Qinmi 9 passion fruit varieties in Yongkang City, Zhejiang Province, this paper conducted analyses on the growth characteristics, fruit yield, and nutritional components of the two passion fruit varieties to assess their potential for cultivation in the local area. The results of many years of introduction experiments showed that when planted in open-air fields, it was advisable to use the cuttings of Tainong 1, and when planted in greenhouse facilities, it was advisable to use the cuttings of Tainong 1 and Qinmi 9, which can achieve high yields. While the seedlings of Tainong 1 and Qinmi 9 had lower yields in open-air fields and greenhouse facilities. Overall, the two passion fruit varieties performed well in Yongkang City, Zhejiang Province, and their fruit quality showed no significant difference from the original place(Yulin City, Guangxi Zhuang Autonomous Region), bringing good economic and nutritional benefits. This research provided a scientific basis for the further promotion of Tainong 1 and Qinmi 9 passion fruit varieties in Yongkang City and its surrounding areas. Table and Figures | Reference | Related Articles | Metrics

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Effects of sowing time and seedling age on the yield of early indica rice variety Yongxian 980 DU Jia, CHEN Peng Journal of Zhejiang Agricultural Sciences    2026, 67 (1): 39-42.   DOI: 10.16178/j.issn.0528-9017.20250107 Abstract （181）   HTML （7）    PDF （1111KB）（231）       Knowledge map    Sowing time and seedling age are the significant factors influencing early rice yield. This study utilized the early indica rice variety Yongxian 980 as the experimental material to investigate the impact of seedling age on the yield of Yongxian 980. A total of four seedling age(20, 25, 30, and 35 days) treatments were implemented. The results showed that there were significant differences in plant height and leaf age of seedlings at different ages, but no significant differences were observed throughout the overall growth period. In terms of yield traits, although the 35-day-old treatment increased the number of tillers, it also reduced the number of effective panicles. Moreover, the panicle formation rate, total grain number per spike and yield were all lower than those of other treatments. The 20-day-old treatment had a relatively small impact on the main agronomic traits of rice. However, due to the short seedlings, they were prone to frost damage and waterlogging after planting. Overall, the transplanting seedling age of Yongxian 980 was preferably 25 to 30 days. This study provides a theoretical basis for the selection of sowing time and the promotion and application of Yongxian 980 in Jinhua City. Table and Figures | Reference | Related Articles | Metrics