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Improving yield and nitrogen use efficiency of hybrid indica rice through optimizing nitrogen application strategies in the rice season under different rotation patterns

文献类型： 外文期刊

作者： Sun, YongJian 1 ; Lin, Dan 1 ; Sun, YuanYuan 2 ; Yan, FengJun 1 ; Ma, Peng 1 ; Guo, ChangChun 1 ; Li, FeiJie 1 ; Yang, ZhiYuan 1 ; Xu, FuXian 3 ; Ma, Jun 1 ;

作者机构： 1.Sichuan Agr Univ, Crop Ecophysiol & Cultivat Key Lab Sichuan Prov, Rice Res Inst, Wenjiang 611130, Peoples R China

2.China Meteorol Adm, Inst Plateau Meteorol, Chengdu 610072, Peoples R China

3.Sichuan Acad Agr Sci, Rice & Sorghum Res Inst, Deyang 618000, Peoples R China

关键词： Rotation patterns; Hybrid indica rice; N application; N utilization; Grain yield

期刊名称：PADDY AND WATER ENVIRONMENT （ 影响因子：1.554； 五年影响因子：1.924 ）

ISSN： 1611-2490

年卷期：

页码：

收录情况： SCI

摘要： Currently, it is difficult to synergistically improve rice yield and nitrogen (N) use efficiency (NUE) resulted from the overuse of N fertilizer under different rotations has become a major issue in China. This study was undertaken to optimize N application and evaluate the feasibility of reducing the amount of N fertilizer in rice crops under different rotations. Three rotations (mustard-rice, rape-rice, and wheat-rice) and different N application strategies (conventional N management and optimum N application strategies according to the Stanford equation) were tested in 2019 and 2020. The relationship between yield or NUE and N accumulation and translocation was, respectively, investigated. Correlation analyses revealed that the yield or NUE was significantly correlated (r = 0.446-0.977, P < 0.05) with the N translocation in stem-sheaths, N translocation contribution rate in blades, and N accumulation from full heading to maturity stage. These results suggest that the N application strategy should be adjusted according to different rotations in order to obtain the highest yield and the best NUE. When the N fertilizer was 105, 125, and 150 kg ha(-1), and the N fertilizer ratio all were 30:30:40 base to tiller to panicle fertilizer, rape-rice, mustard-rice, and wheat-rice rotations each achieve a synergistic increased N accumulation and translocation from full heading to maturity stage and hence, attained higher yield and NUE. The results further indicated that it is practicable to reduce the amount of N fertilizer applied in rice crops planted after rape or mustard but not when grown after wheat.

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