Nitrogen loss under the condition of soil erosion leads to degradation of surface soil and decrease in nutrient supply.The objective of the study was mainly focused on the effect of polyacrylamide(PAM

a high molecular weight organic compound) application on nitrogen absorption ability on sediment and nitrogen loss under simulated rainfall.N fertilizer was urea

applied at the level of 270 kg/hm2.The experiment consisted of 3 PAM application rates(0

1 and 2 g/m2)

with no urea and no PAM application as control treatment

and was conducted at two rainfall intensities of 50 and 80 mm/h.Each treatment was repeated three times.Results showed that the PAM could reduce soil erosion by stabilizing surface soil structure and controlling rill erosion.The PAM application enhanced nitrogen absorption ability on sediment and thus

nitrogen loss in the PAM added treatments decreased obviously and had a strong correlation with sediment process

which implies that the reduction of nitrogen loss by the PAM was mainly caused by controlling soil erosion and sediment yield.The research confirmed that the addition of PAM

had favorable effects in reducing surface sediment and nitrogen loss.