摘要
将淀山湖318试验区5000m2的种植区域,分三块进行水生植物种植。主要种植技术包括竹签扦插法、水泥涵管覆土种植法、麻袋沉栽法和箩筐覆土种植法等。通过水生植物来吸收水体中的氮、磷等营养物质,从而降低水体富营养化水平。试验结果表明,种植水生植物能有效地降低水体中氮、磷的含量,其中总氮含量下降50%,总磷含量下降66%,水体透明度提高17.15%。通过修正的卡尔森营养状态指数对水体进行评价,试验区域的卡尔森指数在68~69.5之间,均要低于对照区的70.88,虽然都处于富营养状态,但水生植物还是起到一定的吸附作用。
Three regions were divided in Plot 318 of Dianshan Lake with an area of 5 000 m2 for planting of aquatic plants.Methods of planting such as prod cutting,covered soil in cement culvert,woven bags encapsulated and covered soil in bamboo crate were used to absorb nutrient like nitrogen and phosphorus to decrease eutrophication level.Results showed that removal efficiency for TN and TP with absorbing by aquatic plant were 50% and 66% respectively,meanwhile transparency increased by 17.15%.By amending Carlson trophic index of water to evaluate the test area,the index was between 68～69.5,which was lower than the control area of 70.88.It was showed the aquatic plant could absorb lots of nutrient although the Lake was still in eutrophic state.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2011年第5期30-34,共5页
Environmental Science & Technology
基金
上海市科技攻关计划项目(上海淀山湖富营养化防治与生态修复实验项目--318国道近岸水域生态带)
关键词
水生植物
富营养化
水质
淀山湖
aquatic plant
eutrophication
water quality
Dianshan Lake
