热门
Ammonia oxidation pathways and nitrifier denitrification are significant sources of N2O and NO under low oxygen availability
文献类型：期刊论文
| 作者 | Zhu, Xia ; Burger, Martin ; Doane, Timothy A. ; Horwath, William R. |
| 刊名 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
 |
| 出版日期 | 2013 |
| 卷号 | 110期号:16页码:6328-6333 |
| ISSN号 | 0027-8424 |
| 产权排序 | 1 |
| 通讯作者 | Zhu, X (reprint author), Chinese Acad Sci, Chengdu Inst Biol, Ctr Ecol Studies, Chengdu 610041, Peoples R China ; Burger, Martin ; Horwath, William R. |
| 英文摘要 | The continuous increase of nitrous oxide (N2O) abundance in the atmosphere is a global concern. Multiple pathways of N2O production occur in soil, but their significance and dependence on oxygen (O-2) availability and nitrogen (N) fertilizer source are poorly understood. We examined N2O and nitric oxide (NO) production under 21%, 3%, 1%, 0.5%, and 0% (vol/vol) O-2 concentrations following urea or ammonium sulfate [(NH4)(2)SO4] additions in loam, clay loam, and sandy loam soils that also contained ample nitrate. The contribution of the ammonia (NH3) oxidation pathways (nitrifier nitrification, nitrifier denitrification, and nitrification-coupled denitrification) and heterotrophic denitrification (HD) to N2O production was determined in 36-h incubations in microcosms by N-15-O-18 isotope and NH3 oxidation inhibition (by 0.01% acetylene) methods. Nitrous oxide and NO production via NH3 oxidation pathways increased as O-2 concentrations decreased from 21% to 0.5%. At low (0.5% and 3%) O-2 concentrations, nitrifier denitrification contributed between 34% and 66%, and HD between 34% and 50% of total N2O production. Heterotrophic denitrification was responsible for all N2O production at 0% O-2. Nitrifier denitrification was the main source of N2O production from ammonical fertilizer under low O-2 concentrations with urea producing more N2O than (NH4)(2)SO4 additions. These findings challenge established thought attributing N2O emissions from soils with high water content to HD due to presumably low O-2 availability. Our results imply that management practices that increase soil aeration, e. g., reducing compaction and enhancing soil structure, together with careful selection of fertilizer sources and/or nitrification inhibitors, could decrease N2O production in agricultural soils. |
| 学科主题 | Science & Technology - Other Topics |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000318041500030 |
| 公开日期 | 2014-11-21 |
| 源URL | [http://210.75.237.14/handle/351003/24232]  |
| 专题 | 成都生物研究所_生态研究 |
| 推荐引用方式 GB/T 7714 | Zhu, Xia,Burger, Martin,Doane, Timothy A.,et al. Ammonia oxidation pathways and nitrifier denitrification are significant sources of N2O and NO under low oxygen availability[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2013,110(16):6328-6333. |
| APA | Zhu, Xia,Burger, Martin,Doane, Timothy A.,&Horwath, William R..(2013).Ammonia oxidation pathways and nitrifier denitrification are significant sources of N2O and NO under low oxygen availability.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,110(16),6328-6333. |
| MLA | Zhu, Xia,et al."Ammonia oxidation pathways and nitrifier denitrification are significant sources of N2O and NO under low oxygen availability".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 110.16(2013):6328-6333. |
入库方式： OAI收割
来源：成都生物研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。