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利用压力膜方法测定晋中东山地区褐土的土壤水分，并分析了土壤水分及其能态特征。结果表明：本区土壤水吸力与土壤含水量之间呈明显的幂函数关系，可以用幂函数方程模拟；土壤的当量孔径分布大致随土壤水吸力的增加而减小；土壤的结构性能良好，通气孔隙、毛管孔隙、无效孔隙的当量孔径分布分别占土壤总孔隙度的１８．３％、５１．２％和３０．５％，尤其是毛管孔隙的分布占土壤总孔隙度的一半以上；土壤的比水容量随吸力的增大而迅速减小．当吸力为０．１×１０￣５～０．３×１０￣５ｐａ时，其比水容量的量级为１０￣（－１）［ｍ１／（１０￣５ｐａ·ｇ）］，而当吸力达３×１０￣５～１５×１０￣５ｐａ时，其比水容量的量级下降了１００倍，为１０￣（－３）［ｍｌ／（１０￣５Ｐａ·ｇ）］。表层土壤水分对于作物吸收利用比心土层和底土层更为有效，但深层土壤的持水性能比表层士壤要好。为此，必须提高作物对土壤深层储水的利用。
The pressure-film method was used to determine the soil water content of the cinnamon soil in Dongshan area of Jinzhong, and the characteristics of soil moisture and its energy state were also analyzed. The results showed that there was a significant power function relationship between soil water suction and soil water content in this area, which could be simulated by power function equation. The equivalent pore size distribution of soil decreased with the increase of soil water suction. The soil structure was good, The equivalent pore size distribution of aeration pores, capillary pores and void pores accounted for 18.3%, 51.2% and 30.5% of the total soil porosity respectively, especially the capillary pores accounted for more than half of the total soil porosity. Soil The specific water capacity decreases rapidly with the increase of suction. When the suction is 0.1 × 10 ~ 5 ~ 0.3 × 10 ~ 5pa, the specific volume of water is 10 ~ (-1) [m1 / (10 ~ 5pa · g)], It is 10 ~ (-3) [ml / (10 ~ 5Pa · g)] when the volume of water is 3 × 10 ~ 5 ~ 15 × 10 ~ 5pa. Surface soil moisture is more effective for crop uptake and utilization than the core and subsoil, but the soil water holding capacity of deep soil is better than that of topsoil. To this end, it is necessary to increase the use of crops for deep soil water storage.