稀脉萍（Lemna paucicostata）对水质的综合评价和指示作用

为探讨利用我国本土植物进行水质综合评价和指示的可行性,试验研究了我国特有的浮萍属植物——稀脉萍(Lemna paucicostata)对不同来源水(自来水、雨水为唯一来源的池塘水、接纳多种排放废水的湖水及垃圾填埋场渗滤液)水质的综合评价和指示效果.结果表明,1)就不同来源水而言,随着水质的下降(自来水、池塘水、湖水、渗滤液),稀脉萍叶状体和群体7d相对增殖率(相对于对照)均逐渐降低;2)就某一污水而言,随着水质的下降(渗滤液稀释4096～128倍),稀脉萍叶状体7d相对增殖率逐渐降低,而群体相对增殖率没有明显变化规律.以上结果提示,稀脉萍对水质具有一定的评价和指示作用,其叶状体相对增殖率可应用于水质的生物学监测和综合评价.

Integrated Evaluation and Indication of Water Quality by Lemna paucicostata

In order to explore the feasibility of using native plant to evaluate and indicate water quality synthetically, we investigated the integrated evaluation and indication effect of Lemna paucicostata, an endemic species of Lemana in China to the water qualities of different sources(tap water, pond water pooled from rain rainwater uniquely, lake water received multiform sewage, and leachate).Results showed that:1) with the deterioration of water quality(from tap water, pond water, lake water to leachate), the ...