几种热带景观植物在不同水体中的去污能力比较研究

Comparison on the Decontamination Ability of Several Tropical Landscape Plants in Different Water Bodies

采用生态浮床技术,对常见的海南本地观赏植物(富贵竹、黄花蔺、闭鞘姜)在不同富营养化水体中去污能力进行研究。结果表明:富贵竹、黄花蔺在不同水体中对TN的净化效果比闭鞘姜显著,20d去除率可达到90%以上。黄花蔺在重度和中度富营养水体中,对CODMn去除效果显著优于富贵竹、闭鞘姜,去除率分别可达69.28%和61.42%。3种植物中富贵竹在各种供试水体均能正常生长,净化效果较明显,植株叶色翠绿,有较好的生态效应和景观效果。

This article investigated the decontamination ability of ornamental plants [Dracaena sanderiana,Limnocharis flava（L） Buch,Costus speciosus（Koening） Smith] commonly seen in Hainan in different entrophical water using cultivating technology of floating bed medium.The main results showed that both Dracaena sanderiana and Limnocharis flava（L） Buch exhibited significant better effects compared with [Costus speciosus（Koening） Smith] in the remediation of total nitrogen（TN） in the investigated waters with removal rates up to 90% in 20 days.The chemical oxygen demand（COD） removal rate of Limnocharis flava（L） Buch was higher than the other two plants in both heavy and middle polluted water,and that for the two waters was 69.28% and 61.42% respectively.Dracaena sanderiana growed normally during all experimental stages in all tested waters,and it had high remediation and eco-decoration effects.