| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
Methane is the second important greenhouse gas after carbon dioxide. Methane is produced in a flooded paddy soil by anaerobic methanogenic archaea. Nanobubbles are fine bubbles less than 10^-6 m in diameter. Nanobubbles have several unique properties, including a long lifetime in water.
We hypothesized that irrigation with nanobubble water made of pure oxygen can reduce methane emission from a flooded paddy soil, and demostrated it from a pot experiment. Cumulative methane emission was significantly (p <0.05) reduced by oxygen-nanobubble water compared to control water by 21%.
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