The function of N,P,K losses mainly is runoff dissolution, but it is comparatively complex, especially the relationship between the nutrient by the loss of runoff dissolution and rainfall intensity is not simple direct ratio.

• 氮磷钾养分的流失则以径流溶蚀为主 ,但情况比较复杂 ,特别是通过“径流溶蚀”流失的养分与雨强并不是简单的正比关系。