For physiochemical analysis,soil samples were collected three variously vegetated slopes in Zhongzhuang watershed of Pengyang County,which is a typical geomorphologic unit of the mountainous regions of the Southern Ningxia Autonomous Region.The results show that both sea-buckthorn woodland and artificial pasture had lower soil moisture,soil bulk density and soil porosity than naturally enclosed land.Compared with the artificial pasture,the sea-buckthorn woodland had lower averages of soil moisture within 0—200 cm,and relatively higher soil bulk density and lower porosity in the layer of 0—60 cm.Within 0—60 cm,the natural land had the highest total nitrogen,readily available nitrogen and soil organic matter,followed by the pasture and the woodland.The woodland,natural land and pasture had respectively high,intermediate and low total potassium,readily available potassium and readily available phosphorus.As for total phosphorus,the woodland had the highest average content and the natural land had the lowest.All the differences were found statistically significant.