水生植物对富营养化水体净化能力的研究

以具有观赏价值的水生植物紫萼、鸭舌草、泽泻、红蓼和水蓼为试材进行水培试验,观察其对含不同质量浓度氮、磷的富营养化水体的净化能力。结果表明:5种植物对富营养化水体均有明显的净化作用,在水体中生长5 d总氮去除率均在80%以上,总磷去除率(10 d)也达到70%以上。5种植物对总磷浓度为0.051 6 mg/L和0.516 0 mg/L水体的总磷去除率极显著高于对总磷浓度为0.010 3 mg/L水体中的总磷去除率,但总磷浓度为0.516 0 mg/L水体与0.051 6 mg/L水体中植物对总磷的去除率差异不显著。5种植物之间对总氮和总磷去除率差异均不显著,紫萼、泽泻和红蓼净化效果较好。

Studies on Purification Ability of Aquatic Plants of the Eutrophication Water

The static experiment indoors were taken using Hosta ventricosa,Monochoria vaginalis,Alisma orientale,Polygonum orientale and Polygonum hydropiper.The relationship between these aquatic plants and the purification capacity of eutrophication water was analyzed.The results showed: all of the five aquatic plants had distinct purification to eutrophication water.TP removal rates and TN removal rates of them strengthened along with the time during the experiment.TN removal rate was more than 80% on the 5 day and TP removed rate was more than 70% on the 10 day.TP removal rates of the aquatic plants in the water where TP density was 0.051 6 mg/L and 0.516 0 mg/L were highly significant than that of 0.010 3 mg/L,but TP removal rates of the water of 0.051 6 mg/L and 0.516 0 mg/L were not significant.TP removal rates and TN removal rates of them were not significant during the experiment.Overall,the purification effects of Hosta ventricosa,Alisma orientale and Polygonum orientale were good.