The results indicated the COD, TN and TP could be removed from the floating bed system of Acorus calamus L and the mixed floating bed system of Acorus calamus L and Yperus slternifolius, respectively.

• 监测结果表明菖蒲与风车草混种及菖蒲浮床系统对试验河水中有机物和N、P的去除较好。