生态学杂志2012，Vol.31Issue(9)：2312-2318,7.
红枫湖富营养化水体生态修复中水生植物化学成分
Chemical components of aquatic plants applied in ecological restoration of eutrophic water in Lake Hongfeng, Guizhou Province of Southwest China
摘要
Abstract
The deep lakes in Plateau Canyon, because of their deep water and their dramatic water level change, are not conducive to the growth of aquatic plants, and thus, the ecological restoration techniques used for shallow lakes are difficult to be applied in deep lakes. In this study, various kinds of aquatic plants were planted on the floating island carrier in Youer Bay at the Lake Hongfeng, a typical plateau deep lake in Guizhou, and the chemical components ( nitrogen , phosphorus, and heavy metals) in the roots, stems, and leaves of the plants were analyzed. The nitrogen content of the plants was Potamogeton crispus ＞ Rumex ＞ Silpniumper folia-tum, the phosphorous content was P. crispus ＞ Elodea muttallii ＞ Rumex, and the effective plants for both nitrogen- and phosphorus removal were P. crispus, E. muttallii, and Rumex. All test aquatic plants could accumulate the heavy metals Cu, Cd, Pb, Zn, and Hg. The cumulative concentration of the heavy metals in the plants was in the order of Zn ＞ Pb ＞ Cu ＞＞ Cd ＞ Hg. In different parts of the plants, root had a higher bioaccumulation coefficient than stem and leaf. The Zn/Cd ratio was higher in leaves than in stems and roots. Overall, Loliumperenne, Rumex,' and P. crispus had greater potential application prospect in water phytoremediation. There was a significant positive correlation between plant total nitrogen (TN) and total phosphorus (TP) , but no obvious correlation between plant nutrients and heavy metals. The plant heavy metals were significantly positively correlated with each other. This study also showed that terrestrial plants could grow well on the floating island barrier, being available in the ecological remediation of the polluted water in deep lakes. In practice, both the water pollution and the plant absorption characteristics should be considered in selecting the best plant combinations.关键词
水生植物/氮、磷/重金属/生态修复Key words
aquatic plant/ nitrogen and phosphorus/ heavy metal/ ecological restoration.分类
资源环境引用本文复制引用
王敬富,陈敬安,濮培民,李键,杨永琼,杨海全..红枫湖富营养化水体生态修复中水生植物化学成分[J].生态学杂志,2012,31(9):2312-2318,7.基金项目
国家科技支撑计划项目(2011BAC02B0201)、贵阳市科技计划项目和环境地球化学国家重点实验室开放课题项目资助. （2011BAC02B0201）
