摘要：To investigate ecological restoration processes of sandy grassland, the areas of different fencingtime (6, 11, 23 years) and non-fencing area were chosen in Yachi County of Ningxia Hui AutonomousRegion. By quadrat method, the vegetation of the study region was investigated for the impacts ofdifferent fencing time on vegetation community structure and biodiversity. The type of dominantspecies in different areas were as follows: annual and biennial herbs (non-fencing area), semishrubs (6 years area), perennial herbs and semi-shrubs (11 years area) and perennial herbs (23years area). The result showed that the values of vegetation coverage, density, biomass and heightin fencing areas were higher than non-fencing area. In short-term period of less than 6 years, fencingincreases biodiversity and makes community structure more stable, but long-term fencing of more than11 years is not conducive to vegetation restoration. It suggested that rational uses of grassland suchas grazing or cutting can be used in sandy grassland in semi-arid areas.
