Based on the investigation and sampling analysis of
no irrigated farmland of Hefei outskirts in 3 years continually, the
content of silt and different nutrient carried by runoff with different
rainfall intensity are statistically calculated and comparatively analyzed.The relationship between different nutrient loss and rainfall intensity and the action of loss are shown. Different appearance of the loss of the surface soil cultivated and nutrient in
no irrigated farmland are found out preliminarily. The relationship between the loss of surface soil and organic material and rainfall intensity are basically manifested positive relativity, the function of loss mainly is runoff scouring. 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. In conclusion, the intensity of soil fertilizer loss in no irrigated farmland is not only influenced by rainfall intensity, but also related to the ways of the loss.