[目的]研究沉水植物对富营养化水体的净化效果.[方法]采用室外盆栽方法,研究伊乐藻(Elodea canadensis)、金鱼藻(Ceratophyllum demersum)、苦草(Vallasneria asiatica)、狐尾藻(Myriophyllum spicatum)四种沉水植物对富营养化水体中氮磷的去除能力 [结果]①四种沉水植物均能在富营养化水体中生长良好,并且具有良好的氮磷去除能力.②与对照相比,四种沉水植物对磷的平均去除率依次提高了7.65、8.85、6.97、1.86个百分点,其中以金鱼藻对磷的去除效果最佳.③与对照相比,四种沉水植物对氮的去除率依次提高了7.93、19.38、16.13、16.19个百分点,其中以金鱼藻对氮的去除效果最佳.[结论]可考虑以金鱼藻为先锋种治理东北地区的富营养化水体.%[ Objective ] To study the removal effect of nitrogen and phosphorus in eutrophic water by four submerged plants. [ Method ] The outdoor pot experiments were conducted to study the removal effects of four submerged plants, including Elodea canadensis, Ceratophyllum demersum, Vallasneria asiatica and Myriophyllum spicatum, on nitrogen and phosphorus in eutrophic water. [Result] ①All of the four submerged plants grew well in eutrophic water and had excellent ability to remove nitrogen and phosphorus. ② Comparing with the control, the average removal rate of four submerged plants on phosphorus was 7.65% , 8.85% , 6.97% and 1. 86% higher, among them, Ceratophyllum demersum showed the best removal capacities on phosphorus. ③ Comparing with the control, the average removal rate of four submerged plants on nitrogen was 7.93% , 19.38% , 16. 13% and 16. 19% higher and Ceratophyllum demersum showed the best removal capacities on nitrogen. [ Conclusion ] Ceratophyllum demersum could be planted as pioneer species to treat the eutrophic waters in Northeast China.
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