Effect of pH and aeration for nitrogen and phosphorus in eutrophic water by aquatic plant on floating-beds was investigated in the greenhouse in this study.The present experiment was studies at different pH after 6 d treatment

removal efficiencies for TN

CODMn

and BOD5 were highest at pH8.9

TP removal was highest at pH6.7

Chla removal was highest at pH5.0 in the planted system.However

removal efficiencies of TN and TP were highest at pH8.9

BOD5 removal was better at pH6.7

removal for Chla and CODMn was highest at pH5.0 in the unplanted(control) system.TN removal was influenced significantly with aeration after 6 d treatment in the planted and unplanted system

and its removal with aeration treatment was much smaller than that with not-aeration(P <0.001).CODMn removal was affected by aeration except for watercress system

but removal of TP and Chla was not impacted by aeration.The results showed that removal efficiencies of NH4-N

NO3-N

and NO2-N were highest at pH8.9 and pH8.9 aeration.