摘要
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。
The paper studied the influence of rainfall event,slope and initial nutrient content to the characteristics of rainfall erosion of three trace elements of iron,zinc and manganese in artificial soil by using the testing method of artificial rainfall. The outcomes show that a) the concentration and erosion of iron,zinc and manganese in runoff show a negative correlation to the rainfall event and the correlation coefficients are all greater than 0. 80 by using power function fitting; b) rainfall runoff and slope show negative linear correlation and the loss of iron,zinc and manganese and slope also show negative linear correlation and the correlation coefficient is greater than 0. 90 and; c) the erosion of iron,zinc and manganese and the initial nutrient content shows linear positive correlation and the correlation coefficient is greater than 0. 90.
出处
《中国水土保持》
2014年第5期44-47,73,共4页
Soil and Water Conservation in China
基金
国家科技支撑计划项目(2011BAK12B04
2012BAD11B03)
成都市科技项目(12GGYB710NC-001)
关键词
人工土壤
微量元素
降雨场次
坡度
初始养分含量
artificial soil
trace element
rainfall event
slope
initial nutrient content
