| Budget Amount *help |
¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
Fiscal Year 2018: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2017: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2015: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
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| Outline of Final Research Achievements |
Soils with high acid buffering capacity (ABC) circulated sufficient amounts of calcium (Ca), whereas Ca circulation was tightly regulated in soils with low ABC in C. japonica forest stands. The lack of Ca accumulation in the surface soil might cause further reduction of ABC in the low-ABC soils. Moreover, the biomass of fine roots was significantly higher in low-ABC soils than in high-ABC soils at C. japonica stands. Morphology of fine roots varied among the stands in response to soil environments. Fine root respiration of C. obtusa might be caused by the morphology. An incubation experiment indicated that fine root litter released a greater amount of acidic materials than leaf litter during their decomposition processes. These results suggest that fine root behaviors in response to the soil environment shift soil chemistry.
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