Influence of Fencing Time on Vegetation Community Structure and Species Diversity in Sandy Grassland of Ningxia in China
2015
Liu Xiaodan | Zhang Kebin | Ahmad Bilal
To investigate ecological restoration processes of sandy grassland, the areas of different fencing time (6, 11, 23 years) and non-fencing area were chosen in Yachi County of Ningxia Hui Autonomous Region. By quadrat method, the vegetation of the study region was investigated for the impacts of different fencing time on vegetation community structure and biodiversity. The type of dominant species 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 (23 years area). The result showed that the values of vegetation coverage, density, biomass and height in fencing areas were higher than non-fencing area. In short-term period of less than 6 years, fencing increases biodiversity and makes community structure more stable, but long-term fencing of more than 11 years is not conducive to vegetation restoration. It suggested that rational uses of grassland such as grazing or cutting can be used in sandy grassland in semi-arid areas.
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