【摘要】 为揭示土壤养分随径流流失的内在机制,采取地下供水方式使土壤入渗强度降低和人工降雨的方法,进行了雨强对土壤养分流失影响的试验研究。结果表明:供试土壤中养分的流失量随降雨强度的增大而增大,而在土壤内部养分迁移量很小;幂函数模型与指数函数模型相比,能更好地模拟黄土区坡面径流溶质浓度变化过程。更多还原

【Abstract】 In order to reveal the inherent mechanism of soil nutrient loss along with runoff loss,the paper conducts tests and study on the influence of rainfall intensity of 40,50,60 and 80 mm/h respectively to the soil nutrient loss by using the methods of reducing infiltration intensity through underground water supply and artificial rainfall.The outcomes show that the tested soil nutrient loss is increased along with the increase of rainfall intensity and the transported soil nutrient is very small and;comparing power function model with exponential function model,it can better simulate the variation process of solute concentration of slope runoff in loess area.更多还原