Study on Dynamic Variation of Soil Moisture in Slope Orchard of Loss Plateau

Through monitoring the soil moisture in slope orchard in Feimahe basin for four years,the dynamic variation of soil moisture in slope orchard was analyzed by using the method of timeliest trend in this paper. The result indicated that the soil-water quantity in the depth of 0～200 cm was 314.71 mm,which was lower than that of slope farmland.The variation rule of soilwater quantity in slope orchard is consumption from January to May,and restore from September to December.The variation degree of soilwater quantity was that the upper was bigger than the lower,and the supplement and consumption of lower was influenced by upper soil moisture.