Exploration of rational utilization level of nitrogen fertilizer for late direct-seeding rapeseed under rice-rapeseed rotation system in western Zhejiang Province

doi:10.16178/j.issn.0528-9017.20240968

Abstract

Abstract:

To explore the rational utilization level of nitrogen fertilizer for late direct-seeding rapeseed under rice-rapeseed rotation system in western Zhejiang Province, a 2-year field experiment was conducted using the new rapeseed variety Zheda 649 as the test material. Four treatments were set up, namely T1 (control, no nitrogen fertilizer), T2 (nitrogen application rate of 90 kg·hm^-2), T3 (nitrogen application rate of 180 kg·hm^-2), and T4 (nitrogen application rate of 270 kg·hm^-2). Compared with the control group, the application of nitrogen fertilizer could significantly (p<0.05) increase the yield of rapeseed as well as its plant height, effective branch number and pod number per plant. Among them, there was no significant difference in the yield of rapeseed between T3 and T4 treatments, but both were significantly higher than that of T2 treatment. In addition, the application of nitrogen fertilizer significantly increased the protein content and oil production, which had higher economic value. Among them, the yield and oil production of T3 treatment were both the highest. Taking the yield, oil production and nitrogen fertilizer utilization efficiency of rapeseed into account comprehensively, the recommended nitrogen fertilizer application rate for late direct-seeding rapeseed under rice-rapeseed rotation system in western Zhejiang Province is 180 kg·hm^-2.

Key words: direct-seeding rapeseed, nitrogen application rate, yield, oil production

CLC Number:

S565

SHI Zijian, GE Siyu, LI Yun, LEI Jun, SHAO Xiaowei, SUN Xiuhua. Exploration of rational utilization level of nitrogen fertilizer for late direct-seeding rapeseed under rice-rapeseed rotation system in western Zhejiang Province[J]. Journal of Zhejiang Agricultural Sciences, 2025, 66(12): 2880-2887.

Figures/Tables 7

References 36

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年份	处理	株高/ cm	第一有效分枝高度/cm	有效分枝数	单株角果数	每角粒数	千粒重/ g	收获密度/ (10⁴·hm^-2)
2021—2022	T1	102.5±3.42 b	62.7±5.49 a	1.58±0.22 c	60.3±3.07 c	14.5±2.05 b	3.99±0.06 c	49.03±2.31 a
	T2	137.1±4.55 a	69.0±1.95 a	4.17±0.08 b	102.1±6.43 b	15.4±1.33 b	4.29±0.05 b	30.56±0.77 b
	T3	150.0±5.34 a	66.5±6.26 a	5.75±0.66 a	140.9±3.37 a	17.4±0.92 ab	4.42±0.04 a	30.69±1.37 b
	T4	144.6±5.85 a	67.6±1.97 a	5.94±0.69 a	148.3±11.21 a	20.1±1.86 a	4.48±0.11 a	26.53±0.97 b
2022—2023	T1	75.1±1.60 c	0 c	0 c	46.1±1.33 c	14.8±0.57 b	3.84±0.11 b	53.68±7.07 a
	T2	115.6±3.86 b	36.2±3.80 b	2.77±0.24 b	52.7±2.06 b	16.5±0.53 ab	4.06±0.09 ab	49.73±7.29 a
	T3	129.0±2.76 a	55.9±3.50 a	4.22±0.52 a	89.1±11.71 a	17.8±0.95 a	4.28±0.10 a	41.07±4.02 ab
	T4	141.0±4.01 a	65.0±5.22 a	4.80±0.32 a	107.1±6.13 a	16.2±0.64 ab	4.19±0.13 a	29.78±1.05 b

年份	处理	株高/ cm	第一有效分枝高度/cm	有效分枝数	单株角果数	每角粒数	千粒重/ g	收获密度/ (10⁴·hm^-2)
2021—2022	T1	102.5±3.42 b	62.7±5.49 a	1.58±0.22 c	60.3±3.07 c	14.5±2.05 b	3.99±0.06 c	49.03±2.31 a
	T2	137.1±4.55 a	69.0±1.95 a	4.17±0.08 b	102.1±6.43 b	15.4±1.33 b	4.29±0.05 b	30.56±0.77 b
	T3	150.0±5.34 a	66.5±6.26 a	5.75±0.66 a	140.9±3.37 a	17.4±0.92 ab	4.42±0.04 a	30.69±1.37 b
	T4	144.6±5.85 a	67.6±1.97 a	5.94±0.69 a	148.3±11.21 a	20.1±1.86 a	4.48±0.11 a	26.53±0.97 b
2022—2023	T1	75.1±1.60 c	0 c	0 c	46.1±1.33 c	14.8±0.57 b	3.84±0.11 b	53.68±7.07 a
	T2	115.6±3.86 b	36.2±3.80 b	2.77±0.24 b	52.7±2.06 b	16.5±0.53 ab	4.06±0.09 ab	49.73±7.29 a
	T3	129.0±2.76 a	55.9±3.50 a	4.22±0.52 a	89.1±11.71 a	17.8±0.95 a	4.28±0.10 a	41.07±4.02 ab
	T4	141.0±4.01 a	65.0±5.22 a	4.80±0.32 a	107.1±6.13 a	16.2±0.64 ab	4.19±0.13 a	29.78±1.05 b

年份	处理	茎秆氮含量	种壳氮含量	籽粒氮含量
2021—2022	T1	2.40±0.10 c	4.57±0.11 b	22.64±0.19 b
	T2	2.34±0.13 c	4.94±0.28 ab	24.18±0.03 ab
	T3	3.05±0.11 b	4.86±0.03 ab	26.19±1.33 a
	T4	3.46±0.12 a	5.21±0.10 a	27.08±1.07 a
2022—2023	T1	2.11±0.11 c	3.25±0.12 d	21.01±0.64 b
	T2	2.14±0.07 c	4.33±0.21 c	20.74±0.41 b
	T3	3.34±0.12 b	4.92±0.12 b	24.42±0.40 a
	T4	4.01±0.06 a	6.14±0.06 a	24.07±0.31 a

年份	处理	茎秆氮含量	种壳氮含量	籽粒氮含量
2021—2022	T1	2.40±0.10 c	4.57±0.11 b	22.64±0.19 b
	T2	2.34±0.13 c	4.94±0.28 ab	24.18±0.03 ab
	T3	3.05±0.11 b	4.86±0.03 ab	26.19±1.33 a
	T4	3.46±0.12 a	5.21±0.10 a	27.08±1.07 a
2022—2023	T1	2.11±0.11 c	3.25±0.12 d	21.01±0.64 b
	T2	2.14±0.07 c	4.33±0.21 c	20.74±0.41 b
	T3	3.34±0.12 b	4.92±0.12 b	24.42±0.40 a
	T4	4.01±0.06 a	6.14±0.06 a	24.07±0.31 a

年份	处理	籽粒		种壳		秸秆		地上部氮积累量/ (kg·hm^-2)	籽粒需氮量/ (g·kg^-1)
年份	处理	氮积累量/ (kg·hm^-2)	占比/ %	氮积累量/ (kg·hm^-2)	占比/ %	氮积累量/ (kg·hm^-2)	占比/ %	地上部氮积累量/ (kg·hm^-2)	籽粒需氮量/ (g·kg^-1)
2021—2022	T1	24.16±1.06 c	69.5±1.6 b	5.11±0.21 c	14.7±0.6 a	5.51±0.21 d	15.9±1.3 a	34.78±1.33 c	32.4±0.01 b
	T2	51.50±1.77 b	74.4±1.1 a	9.38±0.70 b	13.5±1.8 a	8.36±0.50 c	12.1±0.3 b	69.24±2.68 b	32.5±0.05 b
	T3	69.40±2.60 a	71.9±2.4 ab	12.39±0.33 a	12.9±0.6 a	14.67±0.94 b	15.2±0.5 a	96.46±2.41 a	36.4±0.12 ab
	T4	69.38±4.01 a	70.1±0.1 ab	12.93±0.45 a	13.1±1.0 a	16.62±0.42 a	16.8±1.0 a	98.93±4.39 a	38.8±0.25 a
2022—2023	T1	15.21±0.58 c	73.9±0.3 a	2.23±0.19 d	10.9±0.4 c	3.13±0.21 d	15.2±0.1 b	20.57±0.72 d	28.4±0.07 b
	T2	29.53±0.56 b	70.7±1.6 b	5.75±0.33 c	13.8±0.8 b	6.48±0.24 c	15.5±0.3 b	41.76±0.37 c	29.3±0.06 b
	T3	52.71±0.86 a	66.3±0.4 c	11.40±0.37 b	14.3±0.3 b	15.41±0.65 b	19.4±0.7 a	79.52±1.74 b	36.8±0.06 a
	T4	55.32±1.40 a	62.5±0.7 d	15.26±0.20 a	17.3±1.1 a	17.83±0.14 a	20.2±0.6 a	88.41±1.33 a	38.5±0.04 a