| Budget Amount *help |
¥41,340,000 (Direct Cost: ¥31,800,000、Indirect Cost: ¥9,540,000)
Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2018: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2017: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
Fiscal Year 2015: ¥19,370,000 (Direct Cost: ¥14,900,000、Indirect Cost: ¥4,470,000)
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| Outline of Final Research Achievements |
Field experiments were conducted in 10 major rice-producing countries in the world, monitoring the actual conditions of heat-induced spikelet sterility (HISS) and the thermal environment of paddy fields. The difference between the air temperatures inside the canopy and above the canopy was verified and clarified by the panicle temperature estimation model. A new HISS model based on panicle temperature was developed to replace the conventional empirical model based on the daily maximum temperature. In the present and future flooded paddy fields, the panicle temperature is more likely to rise, which increases the sterility rate, in the wet climate condition than in the dry climate condition. It was estimated that when drought stress was applied, the panicle temperature would increase, and the sterility rate would increase in the dry climate than in the wet climate.
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