Study On the Thickness of Biological Soil Crusts in Different Desertification Ecosystem Areas

areas. Abstract. Biological soil crusts serve as a vanguard for improving the ecological environment in arid, semi-arid desertification areas. It is a good indicator of the improvement status which the local ecological environment is undertaking. This study was completed in Yanchi in Ningxia province and Dengkou in the Inner Mongolia Autonomous Region from 2010 to 2011. Through field investigation to study on the thickness of biological soil crusts, find characteristics of biological soil crusts thickness stage. The results show that: Biological soil crusts thickness decreases with increasing distance roots. The biological soil crusts thickness distribution is associated with the crown of plants in different directions. Comparing two kinds of desertificati on ecosystem, the thickness of the biological soil crust in Mu Us Desert were thicker than that in Ulan Buh Desert.