Abstract:  

Through the static hydroponic experiment study of Tangxi River Wetland 9 common aquatic plant growth in eutrophic water and the TN, TP, COD_cr removal ability. The results showed that: (1) The aquatic plants could grow in the water, biomass growth ratio is the highest Shi-changpu 54.36%, the lowest is 39.14% of Hydrilla verticillata; (2) 9 kinds of plants on the removal rate of TN is the highest Shi-changpu 80.62%, the lowest is 56.16% water hyacinth; the removal rate of TP is the highest and lowest is 78.84% reeds, Hydrilla verticillata 43.78%; the removal rate of CODcr is the highest in Huang-changpu 81.60%, the lowest is 44.76% of Hydrilla verticillata. Preliminary thought the 9 plants can choose Huang-changpu, Shi-changpu, reed combination can make the water body to achieve better purification effect.