富营养化水体的水生植物净化试验研究

利用水生植物净化和底泥遮蔽的方法对养鱼池的富营养化水体进行控制研究．结果表明，金鱼藻等6种水生植物对水中总氮、总磷和硝态氮有较好的去除效果，而以狐尾藻和微齿眼子菜两种效果最好，1个月后对总氮的去除率分别为83．84％和77．54％，对硝态氮的去除率分别为95．85％和90．65％，磷的去除率都达到了91．7％．但对氨氮的去除效果稍差，1个月时去除效果只有14％～70％．底泥进行塑料遮蔽处理后在前期(15～20d)能控制底泥中营养盐的释放，但不能保持长久；并在后期表现出“补偿效应”．试验结果还表明。水生植物能有效提高水体透明度和水体观感，但对改善COD和DO的效果不明显．

Purification of eutrophicated water by aquatic plant

In this study,aquatic plants were used to control the pollution of eutrophicated water.The results showed that aquatic plants had a higher ability to remove total nitrogen (TN),total phosphorus (TP) and nitrate nitrogen.Among them,foxtail alga (Myriophyllum verticillatum) and grain leaf pondweed (Potamogeton maackianus) could effectively remove TN (83.84% and 77.54%),TP (91.3%) and nitrate nitrogen (95.85% and 90.65%),but had no significant effect on removing ammonia nitrogen (only 14% to 70%).Sediment shielded by plastic could prolong the release of the nutrients from it for 15 to 20 days,and show the compensation effect later.The results also showed that aquatic plants could greatly improve the transparency of water,but could not improve the COD and DO of water effectively.