| Budget Amount *help |
¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2018: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
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| Outline of Final Research Achievements |
The characteristics of gas exchanges were measured for current year shoots of 13 Fagaceae species. These current year twigs had photosynthetic capacities, though the photosynthetic rate of twigs were lower than that of leaves. And the light utilization efficiencies of twigs were almost same to that of leaves for Fagus crenata. These results shows that young twigs have photosynthetic capacities. On the other hand, the contribution of photosynthesis beneath barks on stem CO2 fluxes might be a little from the measurements of daily courses of stem CO2 fluxes for Fagus crenata. However, the light utilization on the stem surfaces were observed by chlorophyll fluorescence measurements.
The stem CO2 fluxes were measured for 31 tree species grown at tropical seasonal forests, Thailand. The stem morphological characteristics of each species are different. The morphological characteristics of stem surfaces might be one of limiting factors on stem CO2 fluxes.
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