Abstract:

Taihu Lake，as one of the five largest freshwater lakes in China，is presently confronted with accelerated water eutrophication. After the control of point pollution，farm nonpoint source pollution due to wide application of fertilizers and pesticides has become a major factor affecting the water quality in Taihu Lake. Farm ecosystem control and nonpoint source pollution in Taihu Lake area were reviewed in this paper. It was pointed out that，the loads of farm nonpoint source pollutants will continue to increase，due to the increasing use of chemical fertilizers and more surpluses of nitrogen and phosphorus in the farm of this region. Generally，nitrogen and phosphorus in the field are transported to surface water by means of farm drainage and surface runoff and so on. To control the nonpoint source pollution，the function of harness measures of farm ecosystem management was analyzed. Measures，such as soil testing and fertilizer recommendation，conservation tillage and alternative land use regulations，may play a key role in mitigating farm nonpoint source pollution，so as to provide some basis for controlling farm nonpoint source pollution.

Key words: nonpoint source pollution, farm ecosystem management, Taihu Lake Area