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《Acta Prataculturae Sinica》 2017-01
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Grassland community species diversity and aboveground biomass responses to difference in cover soil thickness in restoration after mining damage

SUN Yong-Xiu;YAN Cheng;XU Hai-Liang;YAO Yan-Li;Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences;University of Chinese Academy of Sciences;  
This experiment examined different options for restoration of damaged steppe vegetation in the Kurt Kizu mining area,Xinjiang province,China.Different depths of cover soil(0,10,14,and 18cm)were applied to mine-damaged steppe,and ground cover,height,aboveground biomass and species richness,diversity and evenness of the vegetation were measured.Key results were:1)The number of species present and the diversity were highest when cover soil was applied at a thickness of 14 or 18cm.The cover,height,and aboveground biomass of the vegetation generally increased with the thickness of cover soil,but the differences between 14 and 18cm cover soil thickness were not statistically significant.2)Species richness indices(Rand Ma)ranked:14cm cover soil thickness10cm cover soil thickness18cm cover soil thickness0cm cover soil thickness,while diversity indices(Dand H′)ranked:14cm cover soil thickness18cm cover soil thickness10cm cover soil thickness0cm cover soil thickness.The community evenness indices(Jsw and Ea)showed an inverse ranking to richness and diversity with 0cm cover soil thickness18cm cover soil thickness10cm cover soil thickness14cm cover soil thickness.3)There was a low positive correlation between community productivity and Shannon-Wiener and Simpson indices.Therefore,for the Kurt Kizu mining area,considering economic cost against ecological benefits when restoring damaged steppe,the appropriate cover soil thickness for ecological restoration of grassland vegetation is 14 cm.
【Fund】: 自治区科技支撑计划项目(201533110);; 乌鲁木齐科技局科学技术计划项目(Y553141001)资助
【CateGory Index】: S812
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