A three-year experiment of annual methane and nitrous oxide emissions from the subtropical permanently flooded rice paddy fields of China: Emission factor, temperature sensitivity and fertilizer nitrogen effect
文献类型：期刊论文
| 作者 | Zhou, Minghua ; Wang, Xiaoguo; Wang, Yanqiang; Zhu, Bo
|
| 刊名 | AGRICULTURAL AND FOREST METEOROLOGY
 |
| 出版日期 | 2018-03-15 |
| 卷号 | 250页码:299-307 |
| 关键词 | Nitrous oxide Methane Temperature sensitivity Emission factor Permanently flooded rice |
| ISSN号 | 0168-1923 |
| DOI | 10.1016/j.agrformet.2017.12.265 |
| 英文摘要 | Annual CH4 and N2O emissions from these rice production systems that accounts for over 10% of national rice cultivation of China are rarely reported. To improve understanding of greenhouse gas emissions from croplands in China, we measured methane (CH4) and nitrous oxide (N2O) emissions from the subtropical permanently flooded rice paddy fields through a 3-year field experiment that utilized three nitrogen fertilizer application rates (0 [N0], 150 [N150] and 250 [N250] kg N ha(-1)) in southwestern China. Results showed that seasonal patterns of CH4 and N2O emissions were consistent with temporal weather patterns. The average annual cumulative CH4 fluxes were in the range of 794 to 883 kg CH4-C ha(-1) yr(-1) and N2O fluxes ranged from 1.61 to 3.10 kg N2O-N ha(-1) yr(-1) across the experimental treatments. The Q(10) values (soil temperature sensitivity coefficient) of CH4 and N2O emissions were 2.72-3.67 and 3.32-6.05, respectively, for the three treatments. Inconsistent with our hypothesis, the nitrogen fertilizer application did not increase seasonal and annual N2O emissions over three years, compared to the control. Thus, the annual direct N2O emission factors (EFd) averaged 0.07%, which was substantially lower than the IPCC default value of 0.30% for rice paddy fields. Nitrogen fertilizer application significantly decreased the mean seasonal global warming potential (GWP) and yield-scaled GWP for the rice season, whereas this was not true on an annual basis if fallow season was also considered. Since CH4 emission was the major contributor to total GWP, it is necessary to propose mitigation options, which could include draining the floodwater layer and introducing upland crops during the fallow season. However, it will be challenging to reduce N2O emissions and retain soil organic carbon if the floodwater layer is drained and upland crops are introduced during the fallow season. |
| 语种 | 英语 |
| WOS记录号 | WOS:000427338400025 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.imde.ac.cn/handle/131551/22531]  |
| 专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 通讯作者 | Zhou, Minghua; Zhu, Bo |
| 作者单位 | Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Sichuan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Minghua,Wang, Xiaoguo,Wang, Yanqiang,et al. A three-year experiment of annual methane and nitrous oxide emissions from the subtropical permanently flooded rice paddy fields of China: Emission factor, temperature sensitivity and fertilizer nitrogen effect[J]. AGRICULTURAL AND FOREST METEOROLOGY,2018,250:299-307. |
| APA | Zhou, Minghua,Wang, Xiaoguo,Wang, Yanqiang,&Zhu, Bo.(2018).A three-year experiment of annual methane and nitrous oxide emissions from the subtropical permanently flooded rice paddy fields of China: Emission factor, temperature sensitivity and fertilizer nitrogen effect.AGRICULTURAL AND FOREST METEOROLOGY,250,299-307. |
| MLA | Zhou, Minghua,et al."A three-year experiment of annual methane and nitrous oxide emissions from the subtropical permanently flooded rice paddy fields of China: Emission factor, temperature sensitivity and fertilizer nitrogen effect".AGRICULTURAL AND FOREST METEOROLOGY 250(2018):299-307. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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