Study Of Soil Physical Properties And Water Characteristics Change Under Different Grazing Intensities

This paper studies the impact of different grazing intensity on desert grassland in Inner Mongolia Stipa breviflora light calcium chestnut soil physical properties and moisture content, water infiltration. The results showed:â‘ With the increase in grazing intensity, soil bulk density gradually increases, this phenomenon is most obvious in the soil surface (0-10cm). Soil for the0-10cm CK grazing area soil bulk density minimum1.37g/cm3;LG, MG bulk density values in the value, respectively, was1.38g/cm3,44g/cm3; the maximum bulk density of the HG district is1.47g/cm3; With the increase of the soil to increase the solid density of the grazing intensity in the deep soil horizons. Soil in the proportion of0-10cm CK cell2.48g/cm3; LG, MG grazing area solid density of value is the value of2.49g/cm3,2.50g/cm3; HG grazing area accounted for the largest, is2.53g/cm3; Soil horizons0-10cm soil porosity in the order for the CK> LG> HG> MG and the corresponding values were46.6%,46.09%,44.27%,41.66%. the overall downward trend:but with the soil depth, Soil horizons0-10cm,>1.0mm particle content of the CK grazing area35.53%, LG cell content of33.93%,30.65%in the MG, the HG grazing area is26.93%. we know that in the soil particles with the increase of grazing intensity were significantly reduced:Soil for the four treatments in the0-10cm diameter of<0.01mm physical clay content than the other soil horizons, low levels of CK treatment and LG handles the physical clay containing the highest value of16.48%, MG processing15.48%physical clay content of HG treatment area at least14.48%. This phenomenon shows that the soil physical clay content increased with the increase in grazing intensity, soil physical clay content in the surface0-10cm downward trend.â‘¡In the0-10cm soil horizons field water capacity CK (24.69%), with the increase in grazing intensity, field water capacity lower in the HG grazing area (16.01%), with increasing soil depth of field capacity decreased: each treatment the maximum absorption of water content in the soil0-40cm when there is not much difference between0-10cm handle the maximum absorption of water content is5.23-5.64%; with the increase in grazing intensity, soil penetration to reduce the soil permeability of each plot were significantly different.â‘¢2010MG grazing area the highest soil moisture content of CK, LG, HG,2010the water content of the MG> LG> HG> CK;2011soil water content with the law between2010and soil moisture was no significant difference between the MG and HG grazing areas, soil water content between the MG and CK,LG, grazing area significant difference between the LG and CK significant differences in soil moisture.