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Agricultural management practices in China enhance nitrogen sustainability and benefit human health

文献类型： 外文期刊

作者： Duan, Jiakun 1 ; Liu, Hongbin 3 ; Zhang, Xiuming 1 ; Ren, Chenchen 1 ; Wang, Chen 1 ; Cheng, Luxi 1 ; Xu, Jianming 1 ; Gu, Baojing 1 ;

作者机构： 1.Zhejiang Univ, Coll Environm & Resource Sci, Hangzhou, Peoples R China

2.Zhejiang Univ, Policy Simulat Lab, Hangzhou, Peoples R China

3.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Key Lab Nonpoint Source Pollut Control, Minist Agr, Beijing, Peoples R China

4.Carnegie Inst Sci, Dept Global Ecol, Stanford, CA USA

5.Zhejiang Univ, Zhejiang Prov Key Lab Agr Resources & Environm, Hangzhou, Peoples R China

期刊名称：NATURE FOOD （ 影响因子：23.2； 五年影响因子：23.2 ）

ISSN：

年卷期： 2024 年 5 卷 5 期

页码：

收录情况： SCI

摘要： The potential of enhanced agricultural management practices to drive sustainability is rarely quantified at grassroots level. Here we analyse nitrogen use and loss in Chinese cropland, drawing from data collected in 2,238,550 sites in two national agricultural pollution source censuses from 2007 to 2017. We find an upswing of 10% in crop yields and an 8% reduction in nitrogen pollution during this period, owing to the promotion and adoption of various management practices (including the combination of organic and chemical fertilizers, straw recycling and deep placement of fertilizer). These practices have collectively contributed to an 18% increase in nitrogen use efficiency in the country. By fully embracing them, we project that annual cropland pollution could be further reduced by up to 1.4 Mt of nitrogen without compromising crop yields. Environmental and human health benefits are projected to consistently outweigh implementation costs in the future, with total benefits reaching US$15 billion. The exact quantification of environmental and human health gains achieved through sustainable nitrogen management is often impaired by real-world data availability. Drawing on an extensive database in China, this study estimates the costs and benefits of combining organic and chemical fertilizers, straw recycling and deep placement of fertilizer.

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