Effect of saline water continuous irrigation on winter wheat yield and soil physicochemical property

For the sake of rational exploitation and utilization of shallow layer underground saline water in Huang Huai Hai Plain, through the serial saline water farm irrigation experiment during the years of 2003-2005 at Nanpi Ecological Experimental Station of Chinese Academy of Science in Hebei Province, irrigating winter wheat with saline water of 3 g/L, the long term effect of soil salinity, soil solution content, electric conductivity as well as winter wheat yield irrigated with saline water were analyzed. The objective of above works is to establish a rational saline water irrigation program of winter wheat in North China and to supply a theoretical basis for utilization of saline water. The results showed that the salt was cumulated on upper soil layer when the saline water of 3 g/L mineralization degree was utilized continuously, and plant would be subjected to salt stress, especially, in the rainfall deflection crop year. Yield will increase when irrigated with saline water comparing with that of dry farming and the yield is higher with three times irrigations than that of twice. The repeated saline water irrigations should be avoid if the precipitation is small.