| Natural grasslands in Yanchi county of Ningxia were eroded and degraded by wind and over- grazing. The demonstration region of vegetation restoration and desertification control of degraded grasslands was established in 1987. It was discovered that Caragana intermedia planted in row not only increased the coverage and biomass, but also increased the soil water consumption due to its growth. The seasonal variations and vertical distribution of soil water and soil water storage were evaluated so as to make out the impact of planting density of Caragana intermedia on soil water, The results showed that seasonal variations of soil water content was affected by precipitation, and soil water content tended to be increased from the surface to the deep layer in 0～100 cm soil profile. In the eleventh year after planting, the variances of soil water content of grasslands of different density were insignificant. In the sixteenth year after planting, soil water contents in various soil layer of the grassland of 1 665 clumps/hm2 Caragana intermedia were higher than that of 3 330 clumps/hm2 Caragana intermedia at 0.01 significance level. The soil water storage in 0～100 cm profile of 1 665 clumps/hm\+2 grassland was 245.4 mm, being 48.10 mm and 151.99 mm higher than 2 490 clumps/hm2 grassland and 3 330 clumps/hm2 grassland respectively. |