Excessive N applications reduces yield and biological N fixation of summer-peanut in the North China Plain
文献类型: 外文期刊
第一作者: Huang, Wenhai
作者: Huang, Wenhai;Yang, Yuhao;Zheng, Haoyu;Zou, Jun;Zhang, Li;Hu, Suya;Qiao, Bowen;Wang, Xiaohui;Shen, Shuaijie;Yang, Biaoding;Bai, Zhiyuan;Zheng, Axiang;Li, Wenjie;Wen, Xinya;Chen, Fu;Yin, Xiaogang;Huang, Wenhai;Yang, Yuhao;Zheng, Haoyu;Zou, Jun;Zhang, Li;Hu, Suya;Qiao, Bowen;Wang, Xiaohui;Shen, Shuaijie;Yang, Biaoding;Bai, Zhiyuan;Zheng, Axiang;Li, Wenjie;Wen, Xinya;Chen, Fu;Yin, Xiaogang;Olesen, Jorgen Eivind;Rees, Robert M.;Song, Zhenwei
作者机构:
关键词: Peanut; Biological nitrogen fixation; Nitrogen use efficiency; Soil mineral nitrogen; Yield
期刊名称:FIELD CROPS RESEARCH ( 影响因子:5.8; 五年影响因子:6.9 )
ISSN: 0378-4290
年卷期: 2023 年 302 卷
页码:
收录情况: SCI
摘要: Context: The North China Plain (NCP) is China's largest peanut producing area, where winter-wheat summer peanut is an important double cropping system. Excessive nitrogen (N) applications are widely used leading to declined N use efficiency (NUE) and biological N fixation (BNF). However, the influence of excessive fertilizer N inputs on yield and BNF of summer-peanut remains uncertain.Objective: The study aims to evaluate the impacts of different fertilizer N inputs on yield and BNF of summer peanut in the NCP, and explore the optimal N rates for achieving high NUE and low N losses without sacrificing yield. Methods: A three-year field experiment and pot experiment involving five N treatments (N rates with 0, 50, 100, 150, and 200 kg N ha-1, defined as N0, N50, N100, N150 and N200 in the study, respectively) were conducted in the NCP. The jointing use of field experiment and pot experiment were adopted to measure BNF of summer peanut, and the partial least squares path model and a nightingale rose diagram were both included in the study.Results: Summer-peanut yield increased quadratically with increasing N application, but N rates larger than 150 kg N ha-1 caused inadequate seed filling and thus led to slightly reduced yield. Generally, increased N applications significantly increased soil mineral N (SMN) between 0 and 60 cm depth, and dramatically reduced BNF as high SMN strongly inhibits biological nitrogenase activity.Conclusions: The N application required to obtain an optimum yield of 3915 kg ha-1 with relatively high NUEoi (the ratio of N output and N input, 73.0%) and low N losses in the summer-peanut production was 150 kg N ha-1 in the NCP.Implications: The sustainable development of summer-peanut systems will involve reduced N application rates, and N optimization in the winter-wheat summer-peanut rotation should receive further attention considering the N legacy effects.
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