河北平原不同土体构型水分分布和运行规律及灌水模式

Laws of Water Distribution and Movement in Dlrferent Soil Profiles in Hebei Plain and Irrigation Modes

针对河北平原季风气候和土壤冲积而成的多层次性构造特点，探讨了均质型和间层土壤水分分布和运行特征，在此基础上，提出不同土壤构造三种灌溉模式。（１）土壤质地中等或偏粘均质型常规灌溉模式；（２）土壤质地偏轻均质型少量多次灌水模式；（３）间层土壤少次常量灌溉模式。

Besed on the characteristics of monsoon climate and the behaviors of multiple soil layers formed by alltivitim in Hebei plain, this paper discusses water distri-bution and movement in homogeneous and heterogeneous soils,on the basis os whichthree kinds of irrigation modes for different soil formation are proposed:(1)conventional irrigation mode for soil texture with loamy and light clay;(2) irrigation mode withless water and more times for soil texture with light loamy homogeneous clay;and (3)irrigation mode with normal water and less time for heterogenous soil texture.