湖泊科学2012，Vol.24Issue(2)：206-212,7.
三峡库区消落带不同水位高程植被和土壤特征差异
Differences in vegetation and soil characteristics at different water-level altitudes in the drawdown areas of Three Gorges Reservoir area
摘要
Abstract
Vegetation and soil are the key components of the drawdown area of Three Gorges Reservoir. To investigate characteris-tics of vegetation and soil from water-level altitude of 160 m and 170 m, three drawdown areas with similar geological environment and history of land-use in Zhongxian County were chosen. Results indicated that percent of annual and perennial herbaceous spe-cies in drawdown area were 72.4% and 27. 6% , respectively. There were no significant differences in species composition, cover-age, biomass and biodiversity index between 160 m and 170 m. With water-level altitude changing, the dominant species of plant community varied. Cynodon dactylon was the dominant species at 160 m, while Conyza japonica at 170 m. Soil bulk density, water content, pH, SOM, TN and TP at 160 m and 170 m did not differ significantly. Therefore, it seems reasonable to suggest that their different dominant species resulted from the different inundation period and water depth in those areas between 160 m and 170 m, which did not play a significant role in current vegetation and soil development.关键词
三峡库区/消落带/水位高程/植被/土壤Key words
Three Gorges Reservoir area/drawdown areas/water-level altitude/vegetation/soil引用本文复制引用
王业春,雷波,张晟..三峡库区消落带不同水位高程植被和土壤特征差异[J].湖泊科学,2012,24(2):206-212,7.基金项目
国家水体污染控制与治理科技重大专项项目(2009ZX07104-003-01)资助 （2009ZX07104-003-01）
