种植沉水植物和疏浚底泥对氮磷营养水平的影响  

Effects of Growth of Submerged Macrophytes on Nutrient Level of Dredged Sediments of a Eutrophic lake

作　　者：包先明[1] 陈开宁[1] 范成新[1] 朱龙喜 史龙新 

机构地区：[1]中国科学院南京地理与湖泊研究所 [2]江苏省无锡水文水资源勘测局,江苏无锡214001 [3]无锡市水利局,江苏无锡214001

出　　处：《土壤通报》2006年第5期932-935,共4页Chinese Journal of Soil Science

基　　金：中国科学院知识创新重大项目(KZCX3-SW-348;KZCX1-SW-12);国家自然科学基金项目(No:20577053);国家高技术研究发展计划(2002AA601013)共同资助

摘　　要：通过对五里湖沉积物进行不同疏浚深度(30 cm和60 cm)沉水植物恢复实验研究,结果表明:对于未种植水草的疏浚沉积物来说,疏浚并不能很好地降低水体中氮磷水平,在一定时间内,氮磷水平有恢复增加的可能;种植菹草的疏浚沉积物,除在开始阶段氮磷水平有所增加外,随时间的延长,对上覆水中的氮磷有很好的控制。所以将底泥疏浚与沉水植物的恢复相结合起来,在控制湖泊内源污染方面将达到更好的效果。Submerged macrophetes growth on the dredged sediments（30cm and 60cm） in Lake Wulihu of Jiangsu were simulated under the laboratory control conditions with large -size core samples. The results showed that dredging could not decrease the level of nitrogen and phosphate in upper water without planting submerged macrophetes, but growth of Potamogeton crispus on dredged sediments could control the nitrogen and phosphate levels in upper water. So combination of sediments dredging and submerged macrophetes reestablish was a good method to control inner loading of an eutrophic lake.

关 键 词：疏浚 菹草 氮磷水平 

分 类 号：X52[环境科学与工程—环境工程]