INVENTARISASI BIOMASA DAN KARBON BATANG, CABANG, DAUN DAN TUMBUHAN BAWAH DI HUTAN TANAMAN JATI KPH KEBONHARJO, PERUM PERHUTANI UNIT I JAWA TENGAH

Teak (Tectona grandis L.f.) plantation has an ecological potency as a carbon stock in a long time. However, data and information on biomass and carbon concentration of all carbon pools on teak forests, especially in Perum Perhutani management areas are limited. Aboveground biomass and carbon measurements from teak stand carried out accurately in order to fulfil establish teak forest carbon resource in should be support of implementation of REDD+ schemes. It is an internationa l mechanism to compensate developing countries that successful in reducing emissions from deforestation and forest degradation, integrating aspects of conservation, managing forest sustainably and increasing forest carbon stocks. This study was aimed to develop allometric equations and Biomass Expansion Factor s (BEFs) value on the aboveground teak stands and to assess the potential stock of their aboveground and understorey biomass, carbon and CO2 sequestration. The study area was located in KPH Kebonharjo, Perum Perhutani Unit I Central Java , Indonesia n teak plantation. The data were collected by applying destructive sampling method which purposively selected the trees and understorey samples from the productive forest classes (KU I - KU VI). Analysis of the carbon concentration tested by using spectrophotometry with Walkley and Black method. The assessment of biomass and carbon concentration of teak stands was elaborated through allometric equation approach, while for understorey was conducted by converting the sample plot area into the mean age of each teak classes. The results showed that the allometric equation to estimate aboveground trees biomass and carbon concentration was Wag = 0.075.DBH 2.627 (adjusted R 2 = 0.991) and Cag = 0.033.DBH 2.635 (adjusted R 2 = 0.990). BEF value of abovegr ound teak tree was 1.27 on average with BEF at age