富营养水体中常绿水生植被组建及净化效果研究

Construction and purification efficiency test of an ever green aquatic vegetation in an eutrophic lake

１９９２～１９９３年在富营养湖泊五里湖中开展了常绿型人工水生植被组建实验，在面积为２０００ｍ２的半封闭式围隔实验区中，选用耐寒植物伊乐藻和喜温植物菱及风眼莲，组建成了常绿型人工水生植被。这种常绿型人工水生植被不仅使实验区内常年保持较好的水质，而且对外来污染冲击有很强的缓冲能力。它可用于水源保护、局部性水质控制、污水净化生态工程、小型富营养水体的生态恢复等。如能解决耐寒型沉水植物伊乐藻与喜温型沉水植物种类间的衔接过渡，这种常绿型人工水生植被技术还可望用于富营养水体中天然水生植被的恢复。

Experimental studies were carried out on constructing a kind of ever green aquatic vegetation in the littoral zone of an eutrophic lake,Wali Lake, from June, 1992 to June, 1993. The vegetation was constructed in a no bottom enclosure with surface area of 2000m 2. Cold tolerant plant Elodea Nuttallii and thermophilous plant Eichhonia crassipes and Trapa spp. were used as the dominant. The vegetation not only kept better water quality in the enclosure through the experimental period, but also had strong buffering capacity to the external pollution. It may be used to drinking water source protection, regional water quality conservation, ecological engineering for wastewater purification, and ecological restoration of small eutrophic lakes. If the succession from Elodea Nuttallii to other submerged thermophilous plant will be possible, this technique might be used for constructing naturally regeneratable aquatic vegetation.