simulatednh4ndepositioninhibitsch4uptakeandpromotesn2oemissioninthemeadowsteppeofinnermongoliachina
文献类型：期刊论文
| 作者 | Liu Xingren2; Zhang Qingwen2; Li Shenggong3 ; Zhang Leiming3; Ren Jianqiang1
|
| 刊名 | pedosphere
 |
| 出版日期 | 2017 |
| 卷号 | 27期号:2页码:306 |
| ISSN号 | 1002-0160 |
| 英文摘要 | Few studies are conducted to quantify the effects of enhanced N deposition on soil nitrous oxide (N2O) emission and methane (CH4) uptake in the meadow steppe of Inner Mongolia, China. A two-year field experiment was conducted to assess the effects of nitrogen (N) deposition rates (0, 10, and 20 kg N ha(-1) year(-1) as (NH4)(2)SO4) on soil N2O and CH4 fluxes. The seasonal and diurnal variations of soil N2O and CH4 fluxes were determined using the static chamber-gas chromatography method during the two growing seasons of 2008 and 2009. Soil temperature, moisture and mineral N (NH4+-N and NO3--N) concentration were simultaneously measured. Results showed that low level of (NH4)(2)SO4 (10 kg N ha(-1) year(-1)) did not significantly affect soil CH4 and N2O fluxes and other variables. High level of (NH4)(2)SO4 (20 kg N ha(-1) year(-1)) significantly increased soil NO3--N concentration by 24.1% to 35.6%, decreased soil CH4 uptake by an average of 20.1%, and significantly promoted soil N2O emission by an average of 98.2%. Soil N2O emission responded more strongly to the added N compared to CH4 uptake. However, soil CH4 fluxes were mainly driven by soil moisture, followed by soil NO3--N concentration. Soil N2O fluxes were mainly driven by soil temperature, followed by soil moisture. Soil inorganic N availability was a key integrator of soil CH4 uptake and N2O emission. These results suggest that the changes of availability of inorganic N induced by the increased N deposition in soil may affect the CH4 and N2O fluxes in the cold semi-arid meadow steppe over the short term. |
| 资助项目 | [National Natural Science Foundation of China] ; [National Non-Profit Institute Research Grant of the Chinese Academy of Agricultural Sciences] ; [Key Project of the National Scientific and Technical Support Program, China] |
| 语种 | 英语 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/122099]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 作者单位 | 1.Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences 2.Agricultural Clear Watershed Group, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences 3.中国科学院地理科学与资源研究所 |
| 推荐引用方式 GB/T 7714 | Liu Xingren,Zhang Qingwen,Li Shenggong,et al. simulatednh4ndepositioninhibitsch4uptakeandpromotesn2oemissioninthemeadowsteppeofinnermongoliachina[J]. pedosphere,2017,27(2):306. |
| APA | Liu Xingren,Zhang Qingwen,Li Shenggong,Zhang Leiming,&Ren Jianqiang.(2017).simulatednh4ndepositioninhibitsch4uptakeandpromotesn2oemissioninthemeadowsteppeofinnermongoliachina.pedosphere,27(2),306. |
| MLA | Liu Xingren,et al."simulatednh4ndepositioninhibitsch4uptakeandpromotesn2oemissioninthemeadowsteppeofinnermongoliachina".pedosphere 27.2(2017):306. |
入库方式： OAI收割
来源：地理科学与资源研究所
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