Effects of Leguminous Grazing and Shrub on Ecological Restoration in Yuanmou Arid-hot Valleys

Based on the soil environment character and the lower soil organic carbon content,the effect of Legume grazing and shrub on ecological restoration and soil amelioration is studied in Yuanmou arid-hot valleys.The results showed that:（1）After planting,the microclimate was improved,for example the humidity of the earth’s surface and the restoration plot’s soil of grazing and shrub was higher than that of bare land,but the temperature of them was smaller than that of bare land.（2）With the increasing years of planting,the fertility of the soil was enhanced,such as the content of the soil organic carbon,total N,available potassium and soil pH,and the physical properties were also ameliorated,for example the soil bulk density（SBD）of the restoration plot of the grazing and shrub was lower than that of bare land,but the porosity and field water holding capacity were higher than that of bare land,the field water holding capability were increased.