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In 2012, Indonesia greenhouse gases emission from all sectors including land use change in forestry (LUCF), energy, peat fire, waste, agriculture and industry was 1,453,957,000 Ton CO2e. Objective of this study focus on how much natural forest can generate CO2 absorpsion from tree growth and its emission from peat decomposition and how much Industrial Forest Plantation (HTI) generate CO2 absorpsion from tree growth and their emission from peat decomposition when land clearing and harvesting, its operational activities particularly on transportation and N addition by synthentic fertilizer. The study was conducted in the 14,546 hectares of specific block of forest management unit of Tasik Besar Serkap, Riau Province since May 2015 until June 2016. Result on this study, carbon stock from natural secondary forest is 61,417,315 ton CO2e, carbon emission from secondary natural forest is 276,814 ton CO2e, carbon stock from Industrial Forest Plantation is 18,321,886 ton CO2e, meanwhile CO2 emission is 14,568,891 ton CO2e,. The difference between absorption and emission between the two conditions indicate that HTI has a margin smaller than the secondary natural forest. However CO2 absorpsion of tree growth in HTI give a positive value to the surrounding environment. This study concluded that the existence of HTI management in the absorption of carbon content in a period of 20 years has not reached the level of carbon content owned secondary natural forest. Even the emissions caused by HTI management is much higher than the emissions that occur due to degradation of secondary forests. Keyword: carbon emission, carbon stock, industrial forest plantation, synthetic N fertilizer, transportation. (Diterima: 20-07-2016; Disetujui: 15-08-2016)

Carbon Balance on Pre and Post of Industrial Forest Plantation in Specific Block of Forest Management Unit of Tasik Besar Serkap Riau