关键词: 半干旱区, 半干润土壤水分状况, 农牧交错带

Abstract: Chestnut soil, light black mature soil, black gunny soil, yellow cotton soil and sierozem are principally developed in semi arid area with 250~450 mm precipitation. Among these soils sierozen has arid soil moisture condition, the other three have semi arid or semi humid moisture condition. The growing of the natural tree forest is limited by the inferior soil moisture condition and the incoordination of the light and heat resources, but arid tolerant shrubs and grasses grow well under the condition. For actualizing the sustainable development of the semi arid area the following strategies must be taken:(1) to develop water conservancy; (2) to built level terraces field; (3) to extend the grass cultivation, animal breeding and deep processing of animal by-products.

Key words: semi arid area, soil moisture condition, agricultural and pasturing interlaced zone