外加碳源及沉水植物狐尾藻对上覆水中各形态磷浓度的影响

Effects of Carbon Source Addition and Submerged Plant Myriophyllum spicatum on Concentration of Different Phosphorus Species in Overlying Water

采用室内模拟实验(模拟"水体-底泥-沉水植物"生态系统),研究了外加碳源及沉水植物生长对上覆水总磷(TP)、溶解性总磷(DTP)、溶解性活性磷(SRP)、溶解性有机磷(DOP)的影响。结果表明:在本研究条件下,上覆水中各形态磷以溶解性总磷(DTP)为主;外加碳源,促进了沉积物磷的释放,增加了上覆水磷含量;沉水植物狐尾藻降低了上覆水总磷及各形态磷含量,使上覆水TP、DTP、SRP和DOP分别较未种植沉水植物组降低了31.40%、19.83%、25.95%、12.5%,对水体起到了净化作用。

The effects of carbon source addition and submerged plant Myriophyllum spicatum on the concentration of different phosphorus species [total phosphorus（TP）,dissolved total phosphorus（DTP）,soluble reactive phosphorus（SRP）,dissolved organic phosphorus（DOP）] in overlying water were investigated under the indoor simulative condition（simulating ＇water body-bottom sediment-submerged vegetation＇ ecosystem）.The results indicated that in this paper the main phosphorus species in overlying water was DTP.The carbon source addition could significantly enhance the content of phosphorus in overlying water.Comparing with treatment 2 which did not plant submerged vegetation,the treatment which planted submerged plant Myriophyllum spicatum reduced the concentration of TP,DTP,SRP and DOP in overlying water by 31.40%,19.83%,25.95% and 12.5% respectively,and it had a good purification effect on water quality.