THE RESEARCH OF DESERT MICROPHYTIC CRUSTS ON ERDOS PLATEAU

The function of desert microbiotic crusts in Erdos was analyzed,the results ahowed that: microbiotic crusts consist of fine sand and thick powder sand,but differs with the wind-drift sand,wind-drift sand are coarse sand and fine sand;microbiotic crusts influence the rainfall distribution again and effect on the evaporation of infiltration moisture;microbiotic crusts has the power of water conservation and the function of enrichment of nutrients.