Changes of caragana woodland soil moisture under different sites in Loess Plateau

According to the continuous location monitoring of soil water status of 10 age artificial caragana woodland in a hilly area of the Loess Plateau in the western suburbs of Lanzhou,this paper analyzed the similarities and differences of caragana woodland's soil moisture changes comparatively in different growing seasons,under different aspects.The results showed that:In the growing season,from the initial stage to the growing season then to growth stage,the water content at first decreased and then increased,which was consistent with the law of vegetation water.Vertical variation of soil moisture content of each aspect had a certain similarity,0~60cm soil layer had drastic changes in soil moisture on shady,the soil water content of 60~180cm soil layer was relatively stable.The small to large order of 3aspects' average soil moisture was as shadysemi-shady semi-sunny,mainly due to the impact of vegetation and geography.The impact on soil moisture around caragana was related with the size of the soil moisture,the greater water content the smaller impact on the surroundings.