Effects of mechanized transplanting with synchronized side-deep fertilization on yield and nitrogen use efficiency of double-cropping rice

doi:10.16178/j.issn.0528-9017.20250452

Abstract

Abstract:

To investigate the effects of mechanized transplanting with synchronized side-deep fertilization on yield, nitrogen accumulation, and utilization of double-cropping rice, a field experiment was conducted from 2022 to 2024 using varieties Zhongzao 39 (early rice) and Yongyou 15 (late rice). Five treatments were established: no nitrogen fertilization, other fertilizers broadcast application (T1); conventional fertilization, broadcast application (T2); fixed-quantity fertilization, broadcast application (T3); formula fertilizer, side-deep fertilization (T4); slow-release fertilizer, side-deep fertilization (T5). The results showed that, compared with T2, the yields of early rice in T4, and T5 significantly (p<0.05) increased by 18.3%, and 24.7%, respectively, and late rice yields significantly increased by 10.1%, and 8.9%, respectively. In addition, the total yield of double-cropping rice in T4 and T5 was significantly higher than that in T3, and nitrogen accumulation in these two treatments was also significantly higher than that in T1, T2, and T3. Regarding nitrogen use efficiency, the apparent nitrogen recovery efficiency, agronomic efficiency, and partial factor productivity of early rice in T4 and T5 were significantly higher than those in T2 and T3. For late rice, the apparent nitrogen recovery efficiency in T4 and T5 was also significantly higher than that in T2 and T3. In conclusion, mechanized transplanting with synchronized side-deep fertilization can reduce fertilizer input while increasing yield and nitrogen use efficiency in double-cropping rice, making it a suitable fertilization method for rice production in Zhejiang Province.

Key words: double-cropping rice, side-deep fertilization, nitrogen use efficiency, yield

CLC Number:

S511

KONG Haimin, JIANG Mingbei, LIAN Zhenghua, CHEN Hongjin, ZHAO Yujie, ZHANG Gengmiao, CHEN Zhaoming, WANG Qiang. Effects of mechanized transplanting with synchronized side-deep fertilization on yield and nitrogen use efficiency of double-cropping rice[J]. Journal of Zhejiang Agricultural Sciences, 2025, 66(11): 2562-2565.

Figures/Tables 4

References 18

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处理	早稻			晚稻
处理	氮肥投入量	磷肥投入量	钾肥投入量	氮肥投入量	磷肥投入量	钾肥投入量
T1	0	60.0	90.0	0	60.0	90.0
T2	205.5	60.0	90.0	219.0	60.0	90.0
T3	189.0	48.0	90.0	204.0	54.0	81.0
T4	135.0	54.0	81.0	169.5	54.0	81.0
T5	132.0	52.5	73.9	184.5	60.0	84.0

处理	早稻			晚稻
处理	氮肥投入量	磷肥投入量	钾肥投入量	氮肥投入量	磷肥投入量	钾肥投入量
T1	0	60.0	90.0	0	60.0	90.0
T2	205.5	60.0	90.0	219.0	60.0	90.0
T3	189.0	48.0	90.0	204.0	54.0	81.0
T4	135.0	54.0	81.0	169.5	54.0	81.0
T5	132.0	52.5	73.9	184.5	60.0	84.0

处理	早稻产量	晚稻产量	总产量
T1	4 623 d	5 751 c	10 374 d
T2	6 942 c	7 837 b	14 780 c
T3	7 517 b	8 375 ab	15 892 b
T4	8 210 a	8 626 a	16 836 a
T5	8 654 a	8 535 a	17 189 a

处理	早稻产量	晚稻产量	总产量
T1	4 623 d	5 751 c	10 374 d
T2	6 942 c	7 837 b	14 780 c
T3	7 517 b	8 375 ab	15 892 b
T4	8 210 a	8 626 a	16 836 a
T5	8 654 a	8 535 a	17 189 a

处理	早稻氮积累量			晚稻氮积累量
处理	籽粒	秸秆	总	籽粒	秸秆	总
T1	43.2 c	30.7 c	73.9 c	49.8 c	34.0 c	83.8 c
T2	68.0 b	48.3 b	116.3 b	93.9 b	57.8 b	151.7 b
T3	78.6 b	42.5 b	121.1 b	95.8 b	64.1 ab	159.9 b
T4	102.6 a	56.8 a	159.4 a	110.1 a	68.6 a	178.7 a
T5	99.1 a	64.4 a	163.5 a	106.8 a	69.6 a	176.5 a