2017 Fiscal Year Final Research Report
Development of mitigating greenhouse gas emission at low land rice paddies in climate zones using natural abundances of isotopes
| Project/Area Number |
25252044
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Rural environmental engineering/Planning
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| Research Institution | Meiji University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
溝口 勝 東京大学, 大学院農学生命科学研究科(農学部), 教授 (00181917)
村上 周一郎 明治大学, 農学部, 専任准教授 (00243329)
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| Project Period (FY) |
2013-10-21 – 2018-03-31
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| Keywords | 温室効果ガス / 水田 / 二酸化炭素 / メタン / 亜酸化窒素 / メタン資化性菌 / N2O還元菌 / 土壌 |
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| Outline of Final Research Achievements |
By ilucidating the mechanism of GHG production in paddy fields and its release into soil pores, the objective of the research was to develop a farming procedure for mitigating GHGs emissin. Using lysimeters, rice was cultivated with various water management practices, and its yield and greenhouse gas flux were measured. We also attempted to separat methanogenic and methanotrophic bacteria. GHGs flux with water management practices incorporating intermittent irrigations declined compared to the flooded treatment. As the flow resistance of rice for gases became smaller in the tropical zone at high temperature, a larger amount of CH4 released in the tropics. Tropical paddy fields were the source of net greenhouse gas emissions, and temperate paddy fields were absorption sources. Since the pmoA gene derived from the aerobic methane utilizing bacterium was amplified in the eDNA prepared from the soil where the roots of paddy rice grew, this microbe might use methane.
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| Free Research Field |
土壌物理学
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