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The need for energy in Indonesia is increasingly growing into an inseparable part of the daily life of society. However, the limited availability of fossil fuel sources as raw materials for electricity and increased public awareness to preserve the environment lead to the need for an alternative source of renewable energy such as bioenergy, which is a renewable energy that utilizes biomass as its fuel source. Furthermore, this research was conducted to estimate the potential of biomass in Gunung Walat Education Forest (GWEF) as fuel for electricity generation. Estimation of the potential of electrical energy has been carried out by using the biomass conversion approach to wood pellets (WP). The results showed that Pinus merkusii stands have the highest biomass content (12,828.62 tons with a total area of 104 Ha) and Swietenia macrophylla stands have the lowest biomass content (16.63 tons with a total area of 0.67 Ha) compare to other stands. The total biomass obtained from 358.24 Ha of eleven stands was 45,041.38 tons and it can produce electricity of 123,863.79 MWh, suggesting that the biomass in GWEF has the potential to be developed to fulfill the electricity needs of 10.6 MWh per year.

The existence of Dryobalanops sumatrensis and D. oblongifolia subsp. oblongifolia in Indonesia’s natural forest is increasingly threatened due to land use changes and illegal logging leading to the urgent need of conservation actions in the field. Vegetative propagation by shoot cuttings has been proposed as an alternative method, yet there have been still lacks of information regarding the suitable rooting media and the use of shoots from saplings as cutting materials. This study was to evaluate the survival rate, rooting and shoot sprouting abilites of D. sumatrensis and D. oblongifolia subsp. oblongifolia on two different media (mineral soil and peat). Saplings of the D. sumatrensis aged older than 7 years old and D. oblongifolia subsp. oblongifolia aged less than 2 years old were used as cutting materials. The results showed that the survival rate of D. sumatrensis in peat (43.75%) and mineral soil media (43.75%) was lower than D. oblongifolia subsp. oblongifolia in for peat media (54.55%) and minerals soil media (71.88%). The rooting and shoot sprouting percentage of D. sumatrensis in peat and mineral soil media was also lower than D. oblongifolia subsp oblongifolia. This pattern revealed that the media treatment (peat and minerals) did not affect the survival rate and rooting ability of D. sumatrensis shoot cuttings, but has an effect on D. oblongifolia subsp. oblongifolia.