中文摘要：

利用室内人工模拟降雨试验,研究不同坡度、不同降雨强度下径流小区的径流、泥沙与磷肥输出特征间的关系。研究结果表明：在不同的降雨强度下,径流中磷素质量浓度随时间递减,而泥沙中磷素质量浓度随时间递增,且雨强越大,磷素质量浓度越大 在不同的坡度下,径流中磷素质量浓度随着坡度增大而增大,在20°与25°之间存在转折点,泥沙中磷素质量浓度随坡度增大而增加的规律十分明显,这与径流中磷素随时间变化情况恰好相反。

英文摘要：

The characteristics about runoff, silt and phosphorous concentration were studied under the simulated rainfall in this paper. The results indicate that under the different intensity of rain, the phosphorous concentration was decreased progressively along with time in the runoff, while the phosphorous concentration increased progressively along with time in the silt. The phosphorous concentration is bigger. Under different slope gradients, phosphorous concentration in the runoff along with the slope gradient increases. The turning point exists between 20~ and 25%. The law that phosphorous concentration in the silt increases as slope gradient is very clear, which is just contrary to the change of phosphorus concentration in the runoff.