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采用人工模拟降雨的试验手段,研究了降雨场次、坡度和初始养分含量对人工土壤中铁、锌、锰3种微量元素降雨侵蚀特性的影响。结果表明:铁、锌、锰元素在径流中的浓度和侵蚀量与降雨场次呈负相关,用幂函数拟合,相关系数均达0.80以上;降雨径流量与坡度间呈线性负相关,铁、锰、锌流失量与坡度间也呈线性负相关,相关系数达0.90以上;铁、锰、锌侵蚀量与初始养分含量呈线性正相关,相关系数达0.90以上。
Effects of rainfall times, slopes and initial nutrient contents on the rainfall erosion characteristics of three trace elements iron, zinc and manganese in artificial soils were studied by means of artificial simulated rainfall. The results showed that the concentration and erosion of iron, zinc and manganese in runoff were negatively correlated with rainfall times, and the correlation coefficients were all over 0.80. The correlation between rainfall runoff and slope was linearly negative, Manganese and zinc loss also showed a linear negative correlation with the slope, the correlation coefficient was above 0.90. The correlation between the erosion amount of iron, manganese and zinc and the initial nutrient content was linear and the correlation coefficient was above 0.90.