| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
Plant physiology and root endophytic microorganisms were examined in rainy season and dry season to obtain knowledge about the relationship between mechanism of drought stress tolerance of plants and the symbiotic microorganisms. In order to examine the effect of summer rain, plant physiology and soil microbes after water addition in dry season were also examined. Microbial activity drastically increased after water addition. Increase in nitrogen-fixing bacteria and ammonia oxidizing bacteria were observed. Net nitrification rate and net nitrogen mineralization rate were increased after water addition, but ammonium nitrogen in soil were decreased under the canopy of Larrea tridentata, indicating that the nitrogen was absorbed by the plant. The result indicates that summer rain is important not only for plant water uptake but also nitrogen uptake.
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