Measurements of methane emissions from rice fields in China
文献类型：期刊论文
| 作者 | Khalil, MAK ; Rasmussen, RA ; Shearer, MJ ; Dalluge, RW ; Ren, LX ; Duan, CL(段长麟) |
| 刊名 | J GEOPHYS RES-ATMOS
 |
| 出版日期 | 1998-10 |
| 卷号 | 103页码:25181–25210 |
| 关键词 | methane emissions |
| 通讯作者 | Khalil, MAK |
| 英文摘要 | Rice fields have always been regarded as one of the largest anthropogenic sources of atmospheric methane. Here we report the results of a 7-year study of methane emissions from rice fields in the Sichuan Province of China. In this region, there is one crop of rice per year, the fields are continuously flooded from transplanting to harvest, and there is heavy use of organic fertilizers. Emissions over the entire growing season were measured from each of up to 24 plots. Environmental variables were measured and relevant supporting data on the agricultural practices were recorded. The fields were studied under prevailing agricultural practices of the local farmers. The results represent emissions under standard agricultural practices and the year to year variability of climate, fertilizers, available irrigation water, and cultivars. Based on some 5000 flux measurements, the average emission rates between 1988 and 1994 were 30 mg/m(2)/h for a growing season of between 100 and 120 days. This emission rate is comparable to other published data from similar rice fields but somewhat on the high side of the range. There were no systematic trends of emissions during the 7 years of our experiment, but there was substantial year to year variability. The data have been subjected to exhaustive analyses for validity, accuracy, and reliability. From this, a high-quality, spatially averaged data set has been constructed representing average emissions from the rice fields for each day when measurements were taken. We describe here the main observational results and document the spatial and temporal variability observed on timescales ranging from a day to several years and on spatial scales ranging from 0.5 m(2) to 16 m(2). |
| 收录类别 | SCI |
| 公开日期 | 2013-06-21 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/5419]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） |
| 推荐引用方式 GB/T 7714 | Khalil, MAK,Rasmussen, RA,Shearer, MJ,et al. Measurements of methane emissions from rice fields in China[J]. J GEOPHYS RES-ATMOS,1998,103:25181–25210. |
| APA | Khalil, MAK,Rasmussen, RA,Shearer, MJ,Dalluge, RW,Ren, LX,&Duan, CL.(1998).Measurements of methane emissions from rice fields in China.J GEOPHYS RES-ATMOS,103,25181–25210. |
| MLA | Khalil, MAK,et al."Measurements of methane emissions from rice fields in China".J GEOPHYS RES-ATMOS 103(1998):25181–25210. |
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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