数字农科院2.0

Global comprehensive evaluation shows that green manure enhances crop productivity while mitigating gaseous nitrogen losses

文献类型： 外文期刊

作者： Hua Huang;Zihui Zhang;Qi Wu;Zeyu Liu;Qinghe Wang;Yuhang Ying;Zechao Zhang;Huijuan Zhang;Yifan Wang;Guangxin Zhang;Kemoh Bangura;Enke Liu;Jianfu Xue;Zhiqiang Gao;Tie Cai;Peng Zhang;Peng Wu

作者机构：

关键词： Crop productivity;Global assessment;Green manure;N2O;NH3

期刊名称： Resources, Conservation and Recycling

ISSN： 0921-3449

年卷期： 2025 年 220 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Green manure (GM) is promising for use in sustainable agriculture, but its impacts on nitrogen emissions from farmland and crop productivity are unclear. Thus, we conducted a meta-analysis based on 2,616 data pairs from 218 studies to clarify the effects of GM. GM enhanced soil nitrogen retention to increase the crop yield and nitrogen use efficiency (NUE) by 3.71 % and 24.41 %, respectively, and reduce ammonia (NH3) emissions by 9.09 %, but with no significant impact on nitrous oxide (N2O) emissions. GM was most effective in low-quality soil and warm, humid climates, especially legume GM. Combining GM with high nitrogen fertilizer use may further reduce NH3 emissions. Machine learning models showed that GM could increase global maize and rice yields by 9.78 % and 11.10 %, respectively, and reduce NH3 emissions from major crops by 9.92 %, but increase N2O emissions from paddy fields by 9.45 %. In general, GM can enhance crop productivity and reduce agricultural environmental costs to promote green development.

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