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Estimation of origin of methane emitted from paddy field

Research Project

Project/Area Number 05454067
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Plant nutrition/Soil science
Research InstitutionNagoya University

Principal Investigator

KIMURA Makoto  Nagoya University, Faculty of Agriculture, professor, 農学部, 教授 (20092190)

Co-Investigator(Kenkyū-buntansha) WATANABE Akira  Nagoya University, Faculty of Agriculture, Research associate, 農学部, 助手 (50231098)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥5,900,000 (Direct Cost: ¥5,900,000)
Fiscal Year 1994: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1993: ¥4,600,000 (Direct Cost: ¥4,600,000)
KeywordsMethane / Paddy field / Photosynthate / Earth warming / Rice plant / Isotype / Emission rate / 温室効果
Research Abstract

The contribution of photosynthesized carbon to the total emission of methane from paddy field was estimated using ^<13>C-CO_2. The results obtained were as follows ;
1. A portion of photosynthesized carbon was emitted to the atmosphere in the form of methane within a few hours after feeding.
2. Predominant origin of methane emitted to the atmosphere from paddy field was derived from rice straw until July.
3. The contribution percentages of photosynthesized carbon to the total emitted methane from paddy field increased drastically from the end of July, and it was estimated to be about 90 % at that time. The main source was considered to be from newly photosynthesized carbon.
4. As the excreation to the rhizosphere from plant roots decreased from the end of August, methane emission ftom paddy field decresded. In addition, the contribution percentages of photosynthedized carbon decreased in the stage.
5. The contribution to the total emission of carbon dioxide transferred by the simple difussion from the atmosphere to the rhizosphere was estimated to be negligible.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (3 results)

All Other

All Publications (3 results)

  • [Publications] I.Minoda: "Contribution of Protosynthesized carbon to the methane emitted from Paddy fields" GEOPHYSICAL RESEARCH LETTERS. 21. 2007-2010 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Minoda: "Contribution of photosynthesized carbon to the methane emitted from paddy fields" GEOPHYSICAL RESEARCH LETTERS. 21-18. 2007-2010 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Minoda: "Contribution of photosynthesized carbon to the methane from paddy fields" GEOPHYSICAL RESEARCH LETTERS. 21-18. 2007-2010 (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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