Dissimilatory nitrate/nitrite reduction to ammonium (DNRA) pathway dominates nitrate reduction processes in rhizosphere and non-rhizosphere of four fertilized farmland soil
文献类型：期刊论文
| 作者 | Pan, Huawei; Qin, Yu ; Wang, Yuantao; Liu, Shiguang; Yu, Bin; Song, Yiping; Wang, Xiaomin; Zhu, Guibing
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| 刊名 | ENVIRONMENTAL RESEARCH
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| 出版日期 | 2020-07 |
| 卷号 | 186页码:1-12 |
| 关键词 | DNRA Denitrification Anammox DAMO Arid farmland soil N cycle |
| ISSN号 | 0013-9351 |
| 英文摘要 | Nitrate (NO3-) reduction partitioning between denitrification, anaerobic ammonium oxidation (anammox), denitrifying anaerobic methane oxidation (DAMO), and dissimilatory nitrate reduction to ammonium (DNRA), can influence the nitrogen (N) use efficiency and crop production in arid farmland. The microbial structure, function and potential rates of denitrification, anammox, DAMO and DNRA, and their respective contributions to total NO3- reduction were investigated in rhizosphere and non-rhizosphere soil of four typical crops in north China by functional gene amplification, high-throughput sequencing, network analysis and isotopic tracing technique. The measured denitrification and DNRA rate varied from 0.0294 to 20.769 nmol N g(-1) h(-1) nd 2.4125-58.682 nmol N g(-1) h(-1), respectively, based on which DNRA pathway contributed to 84.44 +/- 14.40% of dissimilatory NO3- reduction, hence dominated NO3- reduction processes compared to denitrification. Anammox and DAMO were not detected. High-throughput sequencing analysis on DNRA nrfA gene, and denitrification nirS and nirK genes demonstrated that these two processes did not correlate to corresponding gene abundance or dominant genus. RDA and Pearson's correlation analysis illustrated that DNRA rate was significantly correlated with the abundance of Chthiniobacter, as well as total organic matter (TOM); denitrification rate was significantly correlated with the abundance of Lautropia, so did TOM. Network analysis showed that the genus performed DNRA was the key connector in the microbial community of dissimilatory nitrate reducers. This study simultaneously investigated the dissimilatory nitrate reduction processes in rhizosphere and non-rhizosphere soils in arid farmland, highlighting that DNRA dominated NO3- reduction processes against denitrification. As denitrification results in N loss, whereas DNRA contributes to N retention, the relative contributions of DNRA versus denitrification activities should be considered appropriately when assessing N transformation processes and N fertilizer management in arid farmland fields. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45267]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 推荐引用方式 GB/T 7714 | Pan, Huawei,Qin, Yu,Wang, Yuantao,et al. Dissimilatory nitrate/nitrite reduction to ammonium (DNRA) pathway dominates nitrate reduction processes in rhizosphere and non-rhizosphere of four fertilized farmland soil[J]. ENVIRONMENTAL RESEARCH,2020,186:1-12. |
| APA | Pan, Huawei.,Qin, Yu.,Wang, Yuantao.,Liu, Shiguang.,Yu, Bin.,...&Zhu, Guibing.(2020).Dissimilatory nitrate/nitrite reduction to ammonium (DNRA) pathway dominates nitrate reduction processes in rhizosphere and non-rhizosphere of four fertilized farmland soil.ENVIRONMENTAL RESEARCH,186,1-12. |
| MLA | Pan, Huawei,et al."Dissimilatory nitrate/nitrite reduction to ammonium (DNRA) pathway dominates nitrate reduction processes in rhizosphere and non-rhizosphere of four fertilized farmland soil".ENVIRONMENTAL RESEARCH 186(2020):1-12. |
入库方式： OAI收割
来源：生态环境研究中心
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