| Budget Amount *help |
¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000)
Fiscal Year 2017: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2016: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2015: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2014: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
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| Outline of Final Research Achievements |
In this study, we focused on the relations between soybean rhizobia and water-logging, salinization, and temperature as soil environmental factors. We have studied for rhizobial dominancy and naturalization under each environmental conditions and application of the ecological traits for soybean production.
The useful bradyrhizobia that indicate complete denitrification became dominant under the reducing condition in soil of water-logging status. And the bradyrhizobia became dominant in case of soybean nodulation. Sinorhizobia raised the infection priority to host soybean in salinized conditions. As a result, nodule occupancy rate by bradyrhizobia became recessive in salinized soil. However, inoculation of useful bradyrhizobia mitigated soybean growth inhibitions under high cultivation temperature.
We have demonstrated some of environmental factors for predominance of useful bradyrhizobia, and have indicated advantage of inoculation for soybean growth against high temperature stresses.
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