| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
To propose optimum land-use strategy to mitigate soil acidification in tropical forests, effects of land-use change on organic matter accumulation were evaluated. Based on the results of comparison between different land-use in East Kalimantan, Indonesia, organic matter accumulation was maximam in Imperata grassland during short-term fallow or natural forest during longer term fallow. Proton budgets associated with nitrogen transformation in the soils suggested that acidification due to nitrofocation was accerelated in Acacia forest and Oil palm plantation. These results suggested that Imperata grassland during short-term fallow or natural forest during longer term fallow is an optimum land-use strategy to mitigate soil acidification of the highly leached Ultisols in East Kalimantan, Indonesia.
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