浙江省湖州地区不同土地利用氮磷非点源污染研究

The Research of Nitrogen and Phosphorus Non-Point Source Pollution of Different Land Use in Huzhou Area,Zhejiang province

根据浙江省湖州地区土壤以及东太湖沉积物样品所测定的数据,对不同土地利用(耕地土、园地土、鱼塘土、林地土)的营养元素进行了定性和定量研究。结果表明:土壤中氮、磷的总量均比太湖沉积物中高,表明有一部分营养物质进入了水体;营养元素相关分析表明,不同土地利用中有机碳含量与总氮相关性较好,与总磷相关性较差。估算出不同土地利用占土壤中流失总氮总磷百分比分别为:总氮,耕地土为63%,园地土为22%,鱼塘土为7%,林地土为8%;总磷,耕地土47%,园地土为28%,鱼塘土为18%,林地土为7%;湖州地区鱼塘土对东太湖的氮磷贡献程度较高。

This paper is according to the determination data which the soil is in HuZhou area of Zhejiang province and east Tai Lake deposit sample, to study qualitative and the quantitative of the nutritive element of the different land use. （farmland soil, garden soil, fishpond soil, woodland soil）The result indicated that the total nitrogen and the total phosphorus In the soil are more than theTaiLake deposit . It indicated that one part of nutrients entered into the water body;The correlation analysis of nutritive elements indicated that the relevanee of the organic carbon content and the total nitrogen is better in the different land use and the total phosphorus relevance is worse;It is estimate that the different land use occupies the loss percentage of total nitrogen and total phosphorus in the soil is：Total nitrogen,the farmland soil is 63%, the garden soil is 22%, the fishpond soil is 7%, the woodland soil is 8% ;Total phosphorus,the farmland soil is 47%, the garden soil is 28%, the fishpond soil is 18%, the woodland soil is 7%;The nitrogen and phosphorus contribution degree of fish pond in Huzhou area for east Tai Lake is higher.