In order to understand the influence of plant types on the purification efficiency of combined constructed wetlands and its relationship with microbial communities,the nitrogen and phosphorus removal efficiency and microbial community structure of three plant types combined constructed wetlands were studied.The results show that the removal rates of CODcr,NH4+-N,NO3--N and TP in calamus wetland were 65.01％-77.45％,72.63％-80.21％,72.63％-80.21％,68.63％-79.14％,respectively;It can be clearly seen that the removal effects of calamus and reed wetland on various pollutants are higher than that of cattail wetland.High-throughput sequencing analysis shows that the constructed wetland of Acorus calamus combination showed higher microbial richness and diversity than the reed and cattail wetlands;Marseilles,Pseudomonas and Nitrospillum are the main denitrogenation bacteria in the constructed wetland,and are also one of the reasons for the high biological nitrogen and phosphorus removal in the constructed wetland where plants are planted.This study provides a certain basis for the selection of plants in the constructed wetland from the diversity analy-sis of microbial community structure in the rhizosphere soil of different wetland plants.
关键词
湿地/植物/微生物/氮磷
Key words
wetland/plants/microorganism/nitrogen and phosphorus
维普
万方数据