Relative contributions of archaea and bacteria to microbial ammonia oxidation differ under different conditions during agricultural waste composting

文献类型： 外文期刊

第一作者： Zeng, Guangming

作者： Zeng, Guangming;Zhang, Jiachao;Chen, Yaoning;Yu, Zhen;Li, Hui;Liu, Zhifeng;Chen, Ming;Lu, Lunhui;Hu, Chunxiao;Zeng, Guangming;Zhang, Jiachao;Chen, Yaoning;Yu, Zhen;Li, Hui;Liu, Zhifeng;Chen, Ming;Lu, Lunhui;Hu, Chunxiao;Yu, Man

作者机构：

关键词： Ammonia-oxidizing archaea (AOA);Ammonia-oxidizing bacteria (AOB);AmoA gene;Composting;Potential ammonia oxidation (PAO) rate

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： The aim of this study was to compare the relative contribution of ammonia-oxidizing archaea (AOA) and bacteria (AOB) to nitrification during agricultural waste composting. The AOA and AOB amoA gene abundance and composition were determined by quantitative PCR and denaturing gradient gel electrophoresis (DGGE), respectively. The results showed that the archaeal amoA gene was abundant throughout the composting process, while the bacterial amoA gene abundance decreased to undetectable level during the thermophilic and cooling stages. DGGE showed more diverse archaeal amoA gene composition when the potential ammonia oxidation (PAO) rate reached peak values. A significant positive relationship was observed between the PAO rate and the archaeal amoA gene abundance (R~2=0.554; P<0.001), indicating that archaea dominated ammonia oxidation during the thermophilic and cooling stages. Bacteria were also related to ammonia oxidation activity (R~2=0.503; P=0.03) especially during the mesophilic and maturation stages.

分类号： Q

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