Studies on dynamic changes of water contents of soil under different land uses in Liudaogou basin

Based on a case study of a slope in the wind-water erosion crisscross region on the Loess Plateau, the dynamic changes of soil water under different land uses were analyzed during the rain season. The results show that the variation of 0～300cm soil water storage of four types of land uses are different, ranking in following order: degraded alfalfa land＞wasteland＞degraded woodland＞farmland, with a weak spatial variability. The decreasing tendencies of soil water in a soil profile with the increase of the depth are obviously different among the different land uses, the order of the variability is as follows: waste land＞degraded woodland ＞degraded alfalfa＞farmland. The soil water content and the plant biomass fluctuate along the slope from the top to its bottom showing that better vegetation consumes more soil water.