三种沉水植物对富营养化池塘水质的改良效果

Effects of Three Submerged Macrophytes on Water Quality Purification of Eutrophic Fishculture Water

通过静态试验研究了三种沉水植物(轮叶黑藻、伊乐藻和金鱼藻)对富营养化池塘养殖水的改良效果。试验结果表明:1)三种沉水植物能够显著提高水体溶氧量和pH值,对水中各种形态氮(尤其硝氮)的净化效果良好;2)轮叶黑藻对水中磷的净化效果较为明显;3)三种沉水植物对水中耗氧有机物的净化效果不明显。总体上看,轮叶黑藻对富营养化池塘养殖水的改良效果最好。

The purification efficiency of eutrophic fishculture water by three submerged macrophytes （Hydrilla verticillata, Elodea canadensis ＆ Ceratophyllum demersum） has been studied. The test results show that： The three submerged macrophytes all have strong capacity of purification on nitrogen, particularly on nitrate-N. But only Hydrilla verticillata has strong capacity of purification on phosphrus. The three submerged macrophytes have a great effect on improving dissolved oxygen concentration and pH value,but no effect on removing organic nutrients. As a whole, the effect of Hydrilla verticillata on purifying eutrophic fishculture water is best.