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.