| Budget Amount *help |
¥43,680,000 (Direct Cost: ¥33,600,000、Indirect Cost: ¥10,080,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2014: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2013: ¥31,200,000 (Direct Cost: ¥24,000,000、Indirect Cost: ¥7,200,000)
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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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