Field test and research on agricultural water-saving irrigation and pollution reduction in Taihu Lake Basin

At present,flood irrigation is mainly adopted in the plain river-network area of Taihu Lake Basin resulting in low water use efficiency,large water drainage and fertilizer loss,severe non-point pollution.In order to strengthen the management of agricultural water use,develop the water-saving irrigation,and improve the ecological environment of agricultural field,Taihu Lake Basin Authority carried out rice-field water-saving test in the plain river-network area to monitor and analyze the water use amount and N and P loss during the drainage process.The results show that water-saving irrigation for rice-field can not only guarantee the rice yield,but also reduce N and P in the drainage with the cooperation of wetland and ecological ditches.