| Budget Amount *help |
¥46,020,000 (Direct Cost: ¥35,400,000、Indirect Cost: ¥10,620,000)
Fiscal Year 2017: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2016: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2015: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2014: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2013: ¥12,220,000 (Direct Cost: ¥9,400,000、Indirect Cost: ¥2,820,000)
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| Outline of Final Research Achievements |
Rice contaminated with high concentrations of radiocesium was found in some local areas after the nuclear accident in Fukushima in 2011. Since 2012, we have continued to cultivate rice experimentally in paddy fields in one of these areas, Oguni, to trace the annual change of radiocesium uptake. To our surprise, the radiocesium concentration in rice cultivated in the experimental paddy fields has seen only a little change since 2013. One of the reason for this is that radiocesium fixation in soil has hardly progressed in these paddy fields. On the other hand, the inflow of radiocesium via irrigation water to the paddy fields has been much lower than the amount absorbed by rice since 2013. Of course, not all paddy fields in Fukushima are in the same situation: our pot experiments showed that parent material of the soil is the most important factors for uptake in rice grown in different areas.
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