Research on loss of nitrogen and phosphorus in Shixia experiment plot

The characteristic of plot effect on loss of nitrogen phosphorus and sediment in soil was studied in this paper.The results show that: in the different land-use,the concentration of Total N and Total P in the runoff of orchard is highest,the lowest one is in the runoff of woodland.However,the loss of Total N and Total P of standard experimental area is highest,the lowest one is woodland;no tillage,terrace tillage has an obvious control on the soil erosion,vegetation coverage also can decrease the runoff and the loss of sediment,so they can prevent the loss of nitrogen and phosphorus effectively;in the experimental area with same land-use and other characteristics,low slope can decreases the loss of nitrogen and phosphorus;there is various plus correlation between rainfall and loss of nitrogen and phosphorus;In rainy season,the nitrogen and phosphorus in the runoff exist mainly in particle form,and there is a remarkable linear relativity between the flow and sediment.