The shape of reactive nitrogen losses from intensive farmland in China

文献类型： 外文期刊

第一作者： Zhan, Xiaoying

作者： Zhan, Xiaoying;Zhang, Qingwen;Li, Ming;Hou, Xikang;Shang, Ziyin;Liu, Zhen;He, Yaping

作者机构：

关键词： Reactive nitrogen loss; Environmental damage cost; Pollution swapping; Sustainable N management

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）

ISSN： 0048-9697

年卷期： 2024 年 915 卷

页码：

收录情况： SCI

摘要： Reactive nitrogen (Nr) pollution has changed radically accompanied by severe intensive farming. This pollution further contributes to ecological degradation and climate warming. Despite this recognition, little is known about the spatial pattern of various Nr loss from croplands and corresponding environmental costs. Here, we identified the major pathway of Nr loss based on provincial estimates in 2008 and 2018, and validated by synchronous observation of ammonia volatilization, N runoff and N leaching using historical literature synthesis. We also evaluated environmental costs at provincial scale and detected the influence factors that dominating the pollution swapping among different Nr forms. Our results show that the total Nr loss was 6.28 +/- 1.81 and 5.56 +/- 2.30 Tg N yr(-1) for Chinese croplands in 2008 and 2018. Ammonia volatilization, which accounted for more than half of the total Nr at the national scale, was proven to be the major Nr loss for two-thirds of the provinces and 80 % of the field observations. The contribution of runoff, which is dominant by precipitation, soil clay content and CEC, was gradually smaller than that of leaching from southeast to northwest. Ammonia and nitrous oxide contributed of 59.3 % - 65.4 % of TNr but 80.9 % - 81.5 % of total environmental damage caused by Nr in China. The use of nitrification inhibitors and straw return indicated pollution swapping among various Nr forms. This study emphasizes that the future practices to reduce total Nr loss need to account for local environmental conditions and have pollution swapping in sights.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序