抄録
A purpose of this study is to evaluate the CO_2 emissions from the land use change for calculating lifecycle CO_2 (LC-CO_2) emission of Jatropha oil based biofuel. A Japanese law for expanding non-fossil fuel set in 2010 indicates that the publication of IPCC or global authorized, fair and neutral data should be used for the calculation. Therefore, based on the IPCC publication and supplemental documents, we extracted challenges on evaluating carbon stock quantity by calculating stock difference before and after cultivation in above-ground, below-ground and soils. As a result, it became clear that, in the grassland, the emission of the CO_2 was lower than 50% of fossil fuels, or emission standards on the law. However, in the shrub, it was more than 50%. There were very few areas of less than 50% in Indonesian Kalimantan Island.
