人工土壤中氮磷氯元素降雨侵蚀试验研究

Experimental Study on Rainfall Erosion of Nitrogen(N),Phosphorus(P)and Chlorine(Cl)in Artificial Soil

利用人工降雨模拟试验,研究了降雨场次、初始养分量和坡度对人工土壤N,P,Cl 3种营养元素径流损失特性的影响.结果表明:(1)径流水中N,P,Cl元素养分质量浓度与降雨场次之间呈对数关系、与初始养分量和坡度之间呈线性关系;(2)N,P,Cl元素养分流失量与降雨场次呈对数关系、与初始养分量和坡度之间呈线性关系;(3)降雨场次对氮元素的作用明显高于磷和氯元素,坡度对N,P,Cl元素的作用大小依次为:Cl,P,N.

In an artificial rainfall simulation experiment, the effects of rain date, initial nutrient content and slope in plot on the runoff loss characteristics of N, P and C1 were studied The results showed that the concentrations of N, P and C1 nutrients in the runoff water were in a logarithmic relationship with rainfall date and in a linear relationship with initial nutrient content and slope; that the loss quantity of N, P and C1 nutrients was in a logarithmic relationship with rainfall date and in a linear relationship with initial nu trient content and slope; and rainfall date had a significantly greater effect on N than on P and C1, and the effect of slope on the nutrients appeared in the sequence of C1, P and N,