草业学报2017，Vol.26Issue(1)：54-62,9.DOI:10.11686/cyxb2016072
受损矿区草原群落物种多样性和地上生物量对覆土厚度的响应
Grassland community species diversity and aboveground biomass responses to difference in cover soil thickness in restoration after mining damage
摘要
Abstract
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 18 cm)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 diversi-ty were highest when cover soil was applied at a thickness of 14 or 18 cm.The cover,height,and aboveground biomass of the vegetation generally increased with the thickness of cover soil,but the differences between 14 and 18 cm cover soil thickness were not statistically significant.2)Species richness indices (R and Ma)ranked:14 cm cover soil thickness>10 cm cover soil thickness>18 cm cover soil thickness>0 cm cover soil thickness,while diversity indices (D and H′)ranked:14 cm cover soil thickness>18 cm cover soil thickness>10 cm cov-er soil thickness>0 cm cover soil thickness.The community evenness indices (J sw and Ea)showed an inverse ranking to richness and diversity with 0 cm cover soil thickness>18 cm cover soil thickness>10 cm cover soil thickness>14 cm 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 ecologi-cal restoration of grassland vegetation is 14 cm.关键词
库尔木图矿区/温带典型草原/覆土厚度/物种多样性/地上生物量Key words
Kurt Kizu mining area/temperate typical steppe/cover soil thickness/species diversity/aboveground biomass引用本文复制引用
孙永秀,严成,徐海量,姚艳丽..受损矿区草原群落物种多样性和地上生物量对覆土厚度的响应[J].草业学报,2017,26(1):54-62,9.基金项目
自治区科技支撑计划项目（201533110）和乌鲁木齐科技局科学技术计划项目（Y553141001）资助。 （）
