Carbon isotopic composition, methanogenic pathway, and fraction of CH4 oxidized in a rice field flooded year-round
文献类型：期刊论文
| 作者 | Zhang, Guangbin1,2; Zhang, Xiaoyan1,2; Ji, Yang1,2; Ma, Jing1; Xu, Hua1; Cai, Zucong1 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
 |
| 出版日期 | 2011-12-08 |
| 卷号 | 116页码:10 |
| ISSN号 | 0148-0227 |
| DOI | 10.1029/2011JG001696 |
| 通讯作者 | Zhang, Guangbin() |
| 英文摘要 | Values of delta C-13 were investigated of CH4 trapped in the soil pore water and floodwater of and emitted from a rice field under continuous flooding throughout the fallow and following rice seasons, and CH4 produced via different pathways and fraction of CH4 oxidized was calculated by using the isotopic data. Pore water CH4 was relatively C-13 depleted, with delta C-13 values about -65 parts per thousand over the season except between July and August (around -55 parts per thousand). Also, hydrogenotrophic methanogenesis was very important (around 50%) for most of the season, while acetoclastic methanogenesis dominated (about 70%) only between July and August. Floodwater CH4 was heavier in delta C-13 value (from -50% to -34 parts per thousand) than pore water CH4 (from -68 parts per thousand to -54 parts per thousand) over the season, demonstrating that it is highly influenced by methanotrophy. The delta C-13 value of emitted CH4 was negatively correlated with flux in temporal variation (P < 0.05), and it was more positive in the fallow season (between -56% and -44%) than in the rice season (between -68 parts per thousand and -48 parts per thousand). This indicates that plant-mediated CH4 transport is probably a more important pathway and causes less CH4 oxidation during the rice season than during the fallow season, which is further confirmed by the fraction of CH4 oxidized being generally greater in the fallow season (60%-90%) than in the rice season (10%-80%). These findings suggest a low contribution of acetoclastic methanogenesis and a high fraction of CH4 being oxidized in the field, especially in the fallow season. |
| 收录类别 | SCI |
| WOS关键词 | METHANE OXIDATION ; STABLE-ISOTOPE ; ATMOSPHERIC METHANE ; SEASONAL-VARIATIONS ; STEADY-STATE ; PADDY SOIL ; DELTA C-13 ; EMISSION ; HYDROGEN ; CO2 |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000298030700001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2559015 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Zhang, Guangbin |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Guangbin,Zhang, Xiaoyan,Ji, Yang,et al. Carbon isotopic composition, methanogenic pathway, and fraction of CH4 oxidized in a rice field flooded year-round[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2011,116:10. |
| APA | Zhang, Guangbin,Zhang, Xiaoyan,Ji, Yang,Ma, Jing,Xu, Hua,&Cai, Zucong.(2011).Carbon isotopic composition, methanogenic pathway, and fraction of CH4 oxidized in a rice field flooded year-round.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,116,10. |
| MLA | Zhang, Guangbin,et al."Carbon isotopic composition, methanogenic pathway, and fraction of CH4 oxidized in a rice field flooded year-round".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 116(2011):10. |
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来源：南京土壤研究所
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