Chen Yunming (Insititute of Soil and Water Conservation, CAS and MWR, 712100,Yangling)

Chen Yongqin (Zhengzhou college of water resources, 450045, Zhengzhou)

Abstract: Based on the study of hydrology and soil and water conservation effects of canopy, litter layer and root system and soil layer of artificial seabuckhthorn stands in semi-arid area of loess hilly and gully region. The results have showed as follow. Average intercepting rate of canopy on rainfall in 7~10 ages seabuckthorn stands is 8.5%. Intercepting maximum of litter layer of 5~10 ages seabuckthorn forest is 0.89 mm in single rainfall. Compared with farmland, mature and young seabuckhtorn stands can decrease soil cubic density in 0~50 cm and 0~25 cm depth of soil layer respectively. Litter self and coving litter layer above soil can increase the capability of soil anti-scour, the surface soil can avoid the erosion by rainfall to cover the litter layer excess 2 cm thickness on it. Seabuckthorn forest has the capability of increasing the soil anti-scouring and anti-eroding. The capability of anti-scour has a power relationship with the number of thin roots in the same soil layer and the capability of anti-erosion has relation with the content of humus in the same soil layer.