The Feature Analysis Of Soil And Vegetatation Of Sinking Sandy Land Of West Wu Ahu Mu Qin Banner Of Inner Mongolia

The sinking sandy land is distributed in the arid - semi-humid areas, after the wind-election and removal, the sand deposits. Then the material has not yet been fully completed the soil-forming process and form a thin layer of humus in the soil surface layer, the lower parts of the soil profile are all wind-accumulated parent material land types. The known sinking sandy land belt distributed in the arid -semi-humid areas, is one of the most sensitive region to the role of human activity. The sinking sandy belts with their incomplete development of the soil structure endure the dual pressure of agriculture and animal husbandry, is the true sense of the ecologically fragile zone. Few domestic scholars pay attention to the sinking sandy land and its assembly--the sinking sandy belts. and foreign scholars have not been concerned about the issue of the sinking sandy landThis paper take the sinking sandy belts of west Wu zhu mu qin banner, Inner Mongolia as the research object, through the analysis of the species composition of vegetation, the soil machinery composition and the soil organic carbon content ,we conclude that:1. The sinking sandy land including three types : typical sinking sandy land, sinking sandy land, sinking sandy land of forest land, sinking sandy land of wetland.2. The typical sinking sandy land vegetation is the common community types of steppe, except for species living in the sandy land.3.The sinking sandy land has thinner humus layer, loose soil structure, rough texture and easy be destroyed, parent material is sandy matter4. Following the fine fraction and soil organic carbon content increasing, the vegetation of the sinking sandy land trends to steady community.5. The sinking sandy land has double features of the sand and grasslands, wetlands, forests.