太湖流域典型平原河网区降雨径流氮磷流失特征分析

通过对研究区降雨径流中氮、磷浓度的野外实验和定点监测,研究典型平原河网区的农田降雨径流氮磷流失特征及其输出规律。得出平原河网区内不同土地利用方式对土壤氮、磷流失的影响很大,同时也得出在平原河网地区氮、磷的输出浓度与降雨时间、径流大小密切相关等结论,为进一步相关研究提供资料积累。

Characteristics of nitrogen and phosphorus loss of rainfall runoff in typical plain river-net area of Taihu Lake Basin

The characteristics and output rules of nitrogen and phosphorus loss of rainfall runoff in farmland of typical plain river-net area were studied through the field survey and the fixed location monitoring of the concentration of nitrogen and phosphorus.Some important conclusions were drawn,i.e.,the different land uses have great influences on the nitrogen and phosphorus loss;and the output concentration of nitrogen and phosphorus varies obviously with the duration of rainfall and the amount of runoff,which provide basic data for further study.