3种生态浮床植物去除鲤鱼塘氮、磷效果比较

Comparison of three kinds of floating bed plants for nitrogen and phosphorus removal effects in carp pond

生态浮床是一种水环境修复与控制技术。本文通过在鲤鱼池中架设生态浮床移栽水生植物(空心菜、水葫芦和水花生),对比分析相同覆盖率下3种水生植物对池塘氮、磷去除效果。试验结果表明:与空白对照组相比,3种浮床植物能够提高水体透明度,有效降低水体中总氮、总磷含量。池塘水体中氮、磷的去除效果依次表现为空心菜>水葫芦>水花生,3种浮床植物对氮、磷去除率依次为74.1%、41.6%,65.7%、39.8%,55.8%、32.1%。空心菜对富营养化养鱼水体的净化效果较好,具有一定的推广应用价值,该研究可为建立养殖池塘尾水生态处理模式提供借鉴。

Ecological floating bed is a water environment restoration and control technology.In order to compare and analyze the removal effect of nitrogen and phosphorus of the fish pond under the same coverage rate of three aquatic plants,In this study,Ipomoea aquatica,Eichhornia crassipes and Alternanthera philoxeroides were transplanted into floating bed in the carp pond.The results showed that the three floating bed plants could improve the water transparency and effectively reduce the total nitrogen and phosphorus content.The removal effects of nitrogen and phosphorus could be summarized as follows I.aquatica>E.crassipes>A.philoxeroides,and the removal rates of nitrogen and phosphorus by three floating bed plants were successively 74.1%,41.6%,65.7%,39.8%,55.8%,32.1%.I.aquatica had a good effect on the purification of eutrophication water body and had a certain value of popularization and application.This study could provide a reference for the establishment of ecological treatment mode for tail water of aquaculture ponds.