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《Pratacultural Science》 2002-06
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Studies on dynamics monitor and sustainable development in eastern edge of Qinghai-Tibetan alpine grassland Ⅱ Analysis of plant community structural featuresand grass species diversity

ZHAO Zhong 1, WANG An lu 2, MA Hai sheng 1, SONG Hui qin 1 (1. Gansu Animal Husbandry Science and Technology Centre, Lanzhou 730030, China; 2. Luqu Animal Husbandry Bureau of Gansu Province, Luqu 747200, China)  
Through analysis and study of the data of the location observation on the structural feature and species diversity on the 8 types of grassland of the alpinemeadow ecosystem in the eastern edge of the Qinghai Tibetan Plateau, the result showed that the plant coverage was well and the species was rich on the alpine meadow type of grassland in the plateau. However, the diversity and the ratio of good quality grass were low on the most grassland. It indicated that the trends of degradation succession, which resulted mainly from overgrazing, pest, human interference and the global climate change etc. In the community structural feature, the succession stages of the community were original vegetation (Ⅵ,Ⅶ), slight degradation (Ⅰ,Ⅲ,Ⅳ,Ⅴ) and heavy degradation (Ⅱ,Ⅷ) successively. The richness index of species in the community (S) wereⅢⅤⅥⅦⅠⅣⅡⅧ successively. The species diversity index wereⅥⅤⅦⅢⅠⅡⅧⅣsuccessively, indicating that the species diversity index of the original vegetation was obviously higher than that of degraded communities. Therefore, it is a pressing task at present to enhance the protection of highland environment so as to stop grassland degradation as soon as possible.
【Fund】: 甘肃省畜牧科技计划项目 (GMK2 0 0 1 12 )
【CateGory Index】: S812
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