数字农科院2.0

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

作者机构：

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

期刊名称： European Journal of Agronomy

ISSN： 1161-0301

年卷期： 2025 年 169 卷

页码：

收录情况： SCIE（2025版）

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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