Abstract：In order to find some new ways for vegetation rehabilitation of desertified grassland,and provide theoretical support for taking effective measures to prevent grassland from degradation,based on the investigation of the soil organic matter contents and soil prarticle composition in different parts of sand dunes,(windward slope,leeward slope and lowland between sand dunes) and in the different locations of sand-barrier (the windward side parts,leeward side and the intersection of sand-barrier),where the grassland was in serious desertification and installed with high-parallel reed sand-barrier of different ages (2～3 and 4～5 years),it was studied that the high-parallel sand-barrier's benefits on controlling grassland after serious desertification by comparing with the same kind of places without sand-barrier. The results showed that contents of soil organic matter could be increased obviously by installation of high-parallel sand-barrier in grassland after serious desertification. In the terms of particle composition,coarse sand was decreased and fine sand was increased.
2004, Vol. 2 
