云龙湖水库沉水植物净化水质的原位围隔试验

在富营养化水库-----云龙湖水库中建立小型围隔区, 对4种沉水植物及组合进行了净化水质的现场试验研究。沉水植物恢复后, 能够有效提高水体的透明度, 改善水体的溶解氧状况, 对水体中的TN和CODC r、BOD5 有明显的去除作用。在受试的沉水植物中, 狐尾藻对水体透明度的改善效果最好, 金鱼藻对水体的增氧效果最好,苦草对总氮的吸收作用最明显, 狐尾藻去磷效果最好, 狐尾藻和金鱼藻对有机质的去除效果较好, 且不同种类组合具有一定的协同作用。

IN Situ Enclosure Experiment for Purification Ability of the Submerged Plants in Yunlong Reservoir

Scene experimental studies were carried out on water quality purification efficiency of four kinds of Submerged plants and their compounding in minitype of an eutrophic lake , Yunlonghu Reservoir , Jiangsu province. The results show that the transparencies in the enclosures with the recovery of macrophytes are efficiently enhanced compared with the controled enclosure without mactophytes and the reservoir water, the status of DO is improved while TN ,COD and BOD are obviously wiped off. Among several experimented submerged plants, Myri-ophyllum spicatum L. has the best effect of improving the transparency , Ceratophyllum demersum L. has the best effect of increasing DO , Vallisneria spiralis L. has the most efficient effect of absorbing TN, Myriophyllum spicatum L. has the best sffect of decreasing TP, Myriophyllum spicatum L. and Ceratophyllum demersum L. has the better effect of decreasing the organical substance.The effect of compoundings of several kinds of Submerged plants can accelerate one and another to a certain extent.