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Optimizing fertilizer N rates to maximize the N legacy effects of peanut for obtaining high wheat yields with low N surplus in a peanut-wheat rotation

文献类型： 外文期刊

作者： Huang, Wenhai 1 ; Zou, Jun 1 ; Yang, Ying 1 ; Olesen, Jorgen Eivind 3 ; Yang, Yuhao 1 ; Rees, Robert M. 4 ; Sun, Hongbao 1 ; Shen, Shuaijie 1 ; Li, Wenjie 1 ; Zhang, Li 1 ; Zheng, Haoyu 1 ; Song, Zhenwei 5 ; Wen, Xinya 1 ; Chen, Fu 1 ; Yin, Xiaogang 1 ;

作者机构： 1.China Agr Univ, Coll Agron & Biotechnol, Minist Agr & Rural Affairs China, Beijing 100193, Peoples R China

2.Minist Agr & Rural Affairs China, Key Lab Farming Syst, Beijing 100193, Peoples R China

3.Aarhus Univ, Dept Agroecol, Blichers 20, DK-8830 Tjele, Denmark

4.SRUC, West Mains Rd, Edinburgh EH93JG, Scotland

5.Chinese Acad Agr Sci, Inst Crop Sci, Minist Agr & Rural Affairs China, Beijing, Peoples R China

6.Minist Agr & Rural Affairs China, Key Lab Crop Physiol & Ecol, Beijing, Peoples R China

关键词： Peanut-wheat rotation; N legacy effects; Soil mineral N; N mineralization

期刊名称：EUROPEAN JOURNAL OF AGRONOMY （ 影响因子：5.5； 五年影响因子：5.9 ）

ISSN： 1161-0301

年卷期： 2025 年 169 卷

页码：

收录情况： SCI

摘要： Maximizing the nitrogen (N) legacy effects of legumes is crucial for reducing N inputs in legume-based rotations to achieve high yield. Excessive N inputs have significantly negatively influenced the N legacy effects of peanut in the peanut-wheat rotation in the North China Plain (NCP). The optimization of N inputs to maximize N legacy effects of peanut and obtain high yields in peanut-wheat rotation has received considerable attention but remains uncertain. A field and pot experiment, comprising five treatments i.e., 0, 50, 100, 150 and 200 kg N ha-1 for peanut and 120 kg N ha-1 for wheat, were set up between 2019 and 2022. Our results showed that more N inputs in the peanut season resulted in higher wheat yields and N uptake. Additionally, higher N inputs of peanut caused larger N legacies from peanut residue to wheat. The N legacy from the peanut residue and soil N mineralization make a significant contribution to wheat. However, excessive N rates (N200) in the peanut season provided minimal improvement in the wheat yield but caused larger N surpluses at the rotational scale. The optimal N rate to achieve high wheat yields with a low N surplus was 270 kg N ha-1 in the peanut-wheat rotation, achieving wheat yield of 8249 kg ha-1 with an N legacy of 20.5 kg N ha-1. Our research should be beneficial for promoting sustainable wheat-peanut production in the NCP as well as in similar areas globally.

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