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

页码：

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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