3种草坪草对中水水质的净化效应研究

Study on Purifying Effects of Three Kinds of Turfgrass to Reclaimed Water Quality

利用水培试验,研究了草地早熟禾、黑麦草和匍匐翦股颖3种草坪草对城市中水水质的净化作用。结果表明,匍匐翦股颖草坪草根系对中水水质中总氮(TN)、总磷(TP)、化学耗氧量(CODcr)的去除率分别达到了94.76%、83.56%、31.37%;草地早熟禾草坪草根系去除率分别达到了93.33%、95.35%、4.93%;黑麦草草坪草根系去除率分别达到了93.56%、94.95%、30.72%。由此表明了草坪根系对中水水质有着较好的净化效果。

A solution-culture experiment was carried out to study the purifying effects of three kinds of turfgrass, including Kentucky Bluegrass, Cerennial Ryegrass, Creeping Bent-grass, to municipal reclaimed water quality. The results showed that the removal rate of Kentucky Bluegrass root to total nitrogen（TN）, total phosphorus（TP）, chemical oxygen demand（CODer） of the reclaimed water quality was 94. 76% ,83.56% ,31.37%, respectively; and the same, the removal rate of Cerennial Ryegrass was 93.33% ,95.35%, 4. 93 %, respectively; the removal rate of Creeping Bent-grass was 93. 33 %, 95.35 %,4. 93 %, respectively. So, it also showed that all of the three kinds of turfgrass have better purifying effects to the reclaimed water quality.