Study on effect in removing of phosphorus from eutrophic water by four aquatic plants

Ion depletion technique was adopted to study root phosphorus(P) uptake kinetics of four aquatic plants(Alternanthera philoxeroides Griseb,Eichhornia crassioes Solms.,Cyperusiria L and Ipomoea aquati-ca).Results showed that there was significant difference in P uptake kinetic parameters(Imax、Km) among four aquatic plants.Alternanthera philoxeroides Griseb and Cyperusiria L were more suitable for the re-moval of high and low concentrations of P,respectively.As to the constructed wetland,Cyperusiria L was more effective for the removal of P.