Strategies for Prevention and Control of Agricultural Pollution and Water Quality Improvement

About 30% of the pollution load in water is from agriculture in China.With the increase of agricultural output,agricultural life and production activities have brought great impact on environment.Together with the serious shortage of agricultural resources,agricultural pollution has severely threatened the safety of people's drinking water and grain food.Therefore,it is crucial to analyze the reason of agricultural pollution and its effect on water environment,to explore the key and difficult points of pollution control techniques,to establish a system strategy of pollution control and water quality improvement from the three angles as technology,policy and legislation.A good technical support is supplied to guarantee water safety,food safety and agriculture sustainable development in China.