华南几种草本植物的水质净化能力研究

Study on Water Purification Ability of Several Herbaceous Plants in Southern China

针对我国华南地区河道水体修复中常见的景观草本植物,选用10种园林草本植物进行耐淹筛选,并将耐淹性强的植物进行污水净化试验。经长达半年的淹水试验观察显示:(1)在这10种常见的园林草本植物中,翠芦莉、香根草、山菅兰、花叶良姜这4种草本植物的耐淹性强;银边沿阶草、紫叶狼尾草、水鬼蕉的耐淹性一般;银边芒、斑叶芒、皇竹草的耐淹性弱;(2)对耐淹性强的4种草本植物进行污水净化试验,20 d后污水水质净化能力基本达到平衡状态,水中污染物质均得到不同程度的净化,其中对污水净化效果较好的草本植物为翠芦莉、香根草,对污水净化效果一般的草本植物为花叶良姜,对污水净化效果较差的草本植物为山菅兰。研究结果为城市景观水体修复提供一定的科学数据支撑。

In this study, 10 kinds of garden herbaceous plants were selected for the common landscape herbaceous plants in the watercourse restoration of Southern China, and the experiments of sewage purification were carried out. The results in the flooding observation for half a year were as follows ： ①among the 10 common garden herbaceous plants, Ruelliabrittoniana, Vetiveria zizanioides, Dianellaensifolia and Alpiniazerumbet ＇Variegata＇, have strong flooding tolerance, Ophiopogonintermedius cv. , Pennisetumalopecuroides and Hymenocallis littoralishave weak flooding tolerance, and the tolerance to flooding of Miscanthussinensis var. Variegatus, Miscant-hussinensis Variegatus and Pennisetumsinese Roxb was the weakest ; ② in the sewage purification experiment, four kinds of waterborne herbs can basically reach the equilibrium state after 20 d, and all the pollutants in the water can be purified in different degrees, including for sewage purification effect is stronger for Ruelliabrittoniana, Vetiveria zizanioides, the effect of Alpiniazerumbet ＇Variegata＇ on sewage purification is general,Dianellaensifolia of sewage purification effect is poorer. The research results provide some scientific data support for urban landscape water body restoration.