文献类型：期刊文献

英文题名：Relationships between nitrogen removal processes and functional microorganisms in the rhizosphere soil in a horizontal surface flow constructed wetland

作者：Zhu, Yinuo[1,2] Li, Jing[1,2] Cai, Zhangjie[1,2] Li, Wei[1,2] Lei, Yinru[1,2] Zhang, Manyin[1,2] Cui, Lijuan[1,2]

第一作者：Zhu, Yinuo

通信作者：Li, J[1];Cui, LJ[1];Li, J[2];Cui, LJ[2]

机构：[1]Chinese Acad Forestry, Beijing Key Lab Wetland Ecol Funct & Restorat, Inst Wetland Res, Xianshan Rd, Beijing 100091, Peoples R China;[2]Beijing Hanshiqiao Natl Wetland Ecosyst Res Stn, Muyan Rd, Beijing 101399, Peoples R China

年份：2019

卷号：70

期号：11

起止页码：1603-1610

外文期刊名：MARINE AND FRESHWATER RESEARCH

收录：;Scopus(收录号：2-s2.0-85073664345);WOS:【SCI-EXPANDED(收录号:WOS:000493383100011)】；

基金：This work was funded by the National Key R&D Program of China (2017YFC0506200), the National Natural Science Foundation of China (41601577) and the Fundamental Research Funds for the Central Non-profit Research Institution of the Chinese Academy of Forestry (CAFYBB2018GB001).

语种：英文

外文关键词：denitrifiers; nitrifiers

摘要：Plant species could significantly affect the nitrogen removal processes mediated by microorganisms in constructed wetlands. However, the links between nitrogen removal processes in the rhizosphere and the related functional microorganisms in a horizontal surface flow constructed wetland in winter remain poorly understood. In this study we collected 24 rhizosphere soils from Typha orientalis and Phragmites australis to evaluate potential nitrogen removal activities, namely the potential nitrification rate (PNR) and denitrification enzyme activity (DEA), and their relationship with functional genes (i.e. nitrate reductase, nirS, and ammonia mono-oxygenase, amoA, of ammonia-oxidising archaea, AOA, and ammonia-oxidising bacteria, AOB) in denitrifiers and nitrifiers in winter. DEA and PNR were significantly higher in the rhizosphere soil of T. orientalis than P. australis, which was due to the higher abundance of nitrifiers and denitrifiers in the rhizosphere of T. orientalis. AOB were the major predictor of PNR in rhizosphere soil of T. orientalis, whereas AOA were more important for P. australis. In addition, denitrifiers containing the nirS gene were found to be the main drivers of DEA, and AOA and AOB also contributed to the denitrification process in the rhizosphere soil of both plants. Furthermore, the abundance of nitrifiers was significantly affected by the C : N ratio, soil organic matter and moisture, whereas the abundance of denitrifiers was affected by soil moisture and pH.