Land-use strategy to mitigate soil acidification using organic matter accumulation process in tropical forests

2016 Fiscal Year Final Research Report

• Project/Area Number: 26850105
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Forest science
• Research Institution: Forestry and Forest Products Research Institute
• Principal Investigator: Fujii Kazumichi 国立研究開発法人森林総合研究所, 立地環境研究領域, 主任研究員 (60594265)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 土壌酸性化 / 有機物動態 / 熱帯林

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.

Free Research Field

森林土壌学