| 中国南京与美国德克萨斯稻田甲烷排放的比较 |
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| 作者姓名： | Huang Yao Jiang Jingyan Zong Lianggang Ronald L. Sass Frank M. Fisher |
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| 作者单位： | |
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| 摘 要： | Field measurements of methane emission from rice paddies were made in Nanjing, China and in Texas, USA, respectively. Soil temperature at approximately 10 cm depth of the flooded soils was automatically recorded. Aboveground biomass of rice crop was measured approximately every 10 days in Nanjing and every other week in Texas. Seasonal variation of soil temperature in Nanjing was quite wide with a magnitude of 15.3℃ and that in Texas was narrow with a magnitude of 2.9℃. Analysis of methane emission fluxes against soil temperature and rice biomass production demonstrated that the seasonal course of methane emission in Nanjing was mostly attributed to soil temperature changes, while that in Texas was mainly related to rice biomass production. We concluded that under the permanent flooding condition, the seasonal trend of methane emission would be determined by the soil temperature where there was a wide variation of soil temperature, and the seasonal trend would be mainly determined by rice biomass production if there are no additional organic matter inputs and the variation of soil temperature over the rice growing season is small.
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| 关 键 词： | 甲烷排放 稻田 水稻生物量 土壤温度 |
| 收稿时间： | 13 December 2000 |
Comparison of field measurements of CH4 emission from rice cultivation in Nanjing, China and in Texas, Usa |
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| Huang Yao,Jiang Jingyan,Zong Lianggang,Ronald L. Sass,Frank M. Fisher.Comparison of field measurements of CH4 emission from rice cultivation in Nanjing, China and in Texas, Usa[J].Advances in Atmospheric Sciences,2001,18(6):1121-1130. |
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| Authors: | Huang Yao Jiang Jingyan Zong Lianggang Ronald L Sass Frank M Fisher |
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| Institution: | Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095,College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095,College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095,Department of Ecology and Evolutionary Biology, Rice University, Houston, Texas, USA,Department of Ecology and Evolutionary Biology, Rice University, Houston, Texas, USA |
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| Abstract: | Field measurements of methane emission from rice paddies were made in Nanjing, China and in Texas, USA, respectively. Soil
temperature at approximately 10 cm depth of the flooded soils was automatically recorded. Aboveground biomass of rice crop
was measured approximately every 10 days in Nanjing and every other week in Texas. Seasonal variation of soil temperature
in Nanjing was quite wide with a magnitude of 15.3°C and that in Texas was narrow with a magnitude of 2.9°C. Analysis of methane
emission fluxes against soil temperature and rice biomass production demonstrated that the seasonal course of methane emission
in Nanjing was mostly attributed to soil temperature changes, while that in Texas was mainly related to rice biomass production.
We concluded that under the permanent flooding condition, the seasonal trend of methane emission would be determined by the
soil temperature where there was a wide variation of soil temperature, and the seasonal trend would be mainly determined by
rice biomass production if there are no additional organic matter inputs and the variation of soil temperature over the rice
growing season is small.
This work was supported by grants from TECO/NASA, the United States, the Hundred Talents Program, Chinese Academy of Sciences
and the National Key Basic Research Development Foundation (approved # G1999011805), China. |
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| Keywords: | CH4 emission Rice paddies Rice biomass production Soil temperature |
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