| Based on the routine weather data and the constant observational data of soil moisture for 18 representative stations during 19802002, the farmland soil water supply dynamic model of five regions in Liaoning province was established with mathematical and statistical method. The results showed that there was a straight linear relationship between soil water supply coefficient Kwand relative soil available water contents. The water supply ability of soil in the eastern, northern and central regions was better than that in the western and southern regions in Liaoning province. |