Research on Multi-Factor Effects of Nitrogen Loss in Slope Runoff

文献类型: 外文期刊

第一作者: Wang, Lei

作者: Wang, Lei;Wang, Na;Zhang, Qing;Pang, Min;Jin, Liang;Wang, Lei;Wang, Na;Wu, Jiajun;Pang, Min;Yang, Zhixin;Zhang, Qing;Wang, Shilei;Wang, Jifeng;Zhou, Chao;Han, Yehui

作者机构:

关键词: simulated rainfall; surface runoff; subsurface runoff; soil nitrogen; vegetation cover; slope; rainfall intensity

期刊名称:WATER ( 影响因子:3.4; 五年影响因子:3.5 )

ISSN:

年卷期: 2024 年 16 卷 10 期

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收录情况: SCI

摘要: To study the characteristics of nitrogen (N) loss on slopes, different vegetation (bare soil, alfalfa), slopes (5 degrees, 10 degrees, 15 degrees), and rainfall intensities (40, 60, 80 mm/h) were set as variable factors in simulated rainfall experiments. Surface runoff accounts for 60.38-96.16% of total runoff and most N loss (57.69-88.67% of NO3--N). Alfalfa can reduce average concentrations of N loss in runoff and reduce N loss in surface runoff by more than 48.29%, as well as subsurface runoff by 3.8%. Average N loss in subsurface runoff exceeds that of surface runoff. Rainfall intensity most affects N loss from surface runoff in bare soil conditions, and slope most affects N loss in subsurface runoff. Rainfall intensity in alfalfa treatments most influences runoff volume and N loss. The comprehensive effects of rainfall intensity, slope, and vegetation cover on the total loss of various forms of nitrogen in surface runoff can be described using a linear correlation equation, with a correlation coefficient between 0.84 and 0.91.

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