Having bilt forest of Hippophae rhamnaides Linn.in the slope of Debrits Flow Red Earth(DFRE),the changes of soil moisture and temperature in the surface soil become more evenly.The ten-years forest has shown its improving effects on the soil.The physical and chemical properties of the soil have been improved at the different degrees.The biomass of Hippophae rhamnaides Linn.in DFRE is second only to that in the shaddy ditch slope,and is more than that in the other conditions