A tree volume estimation model of kayu bawang (Disoxylum molliscimum) in farm forestry was made in North Bengkulu based on data collected from 96 trees sample, 66 trees sample was used in model fitting and the remain 30 trees sample in model validation. The model construction was aimed for better estimation of forest plantation yield in order to perform effective forest management. The tree volume estimation model constructed in 5 form of regression formulas with diameter and height as independent variable. The best formula was selected by statistic test criteria of model construction and model validation i.e. coefficient of determination (R), root mean square error (RMSE), average deviation (SR) and aggregate deviation (SA). Based on the criteria, the best formula of tree volume estimation model of kayu bawang is V = 0,0001027 D H with the value of R =95,

In order to acquire the high accuracy and fast prediction of standing volume, the measurement of tree volume needed to be done with high precision. Model for estimating tree volume could be used to develop tree volume table. The purpose of this research was to develop model for estimating tree volume with high precision of Alstonia scholaris in Musi Rawas Regency-South Sumatera. Six regression equations were used to develop model based on diameter and height of tree. The criteria used for the best model were: the highest corrected determination coefficient (R), the smallest bias, and the smallest root mean square error (RMSE).The result showed that the best model was obtained for estimating tree volume of Alstonia

Forest and land fires are a high source of emissions in South Sumatera. In line with the national policy, South Sumatera Province commits in reducing emission, include emission from the forest and land fire. This research was aimed to assess carbon loss affected by fire in the year of 2015 that covered 3 districts in South Sumatera i.e Musi Banyuasin, Banyuasin, and Musi Rawas. The research was conducted by remeasurement of carbon stocks plots on 4 forests and land type i.e. secondary peat swamp forest, secondary dryland forest, bushes swamp, and forest plantation. Carbon stocks measuring are conducted on sample plots in a rectangular shape of 20 m x 50 m of size for various types of natural forest and a circle shape in the radius of 11.29 cm and 7.98 cm respectively for forest plantation of < 4 years and > 4 years old. Furthermore, carbon stocks in each plot are measured for 3 carbon pools of above-ground biomass, deadwood and litter. The result shows that carbon loss was varying on each forest and land type. The largest number of carbon loss occur on secondary peat swamp forest of 94.2 t/ha that equivalent to the emission of 345.4 t CO2eq. The second largest of carbon loss occur on secondary dryland forest of 36.3 t/ha following by forest plantation and bushes swamp of 18.5 t/ha and 13.5 t/ha. The largest carbon loss on secondary peat swamp forest and forest plantation occur on above-ground biomass pool but secondary dry forest and bushes swamp occur on the dead wood pool.

Keywords: Bambang, diametre breast height, crown diametre, stand densityStand density arrangement plays an important role on development of plantation forest to obtain optimal result. This research presents a way of bambang stand density arrangement based on crown development. Optimal crown area (ca) is determined by regression equation between diameter of breast heigh (dbh) and crown diameter (cd). While stand density is determined by dividing plantation area with optimal crown area (ca). Data collection was carry out by measuring 380 tree sample on farm forestry in Lahat Regency, Empat Lawang Regency, and Pagar Alam City. Regression equation both variable was formulated based on 280 tree samples and validated of 100 samples remain. Result showed that correlation equation between diametre brest heigh and crown diametre with the highest accuration is quadratic equation Cd = 3.15 + 0.0391 Dbh + 0.00251 Dbh (R 68.52%, bias 0.2% dan RMSE 73.76%). Michelia champaca 2 2

Pelawan (Tristaniopsis merguensis Griff.) has been used for many purposes in Southern Sumatera including for energy, food and medicine but effort to cultivate the species is not yet tried properly. The wide utilization resulting overexploitation and degraded its natural habitats. Research on pelawan utilization and cultivation was conducted with survey and field experimental method. Survey conducted on its natural habitats and related home industry and the field experimental is conducted on the Forest Area for Specific Purpose (KHDTK) of Kemampo to promote cultivation of the species. Result showed that pelawan was mostly used for energy purpose in the form of small timber both used directly as firewood or after being converted into charcoal. Utilization of pelawan as firewood is mostly done by household and several restaurants to get food with distinctive taste but pelawan charcoal is managed as an export commodity product by home industry. Pelawan has strong ability to sprout and stump sprouting became the main regeneration mechanism, however, generative reproduction is an important mechanism to increase its stand productivity. Cultivation trials showed that pelawan can be cultivated in generative reproduction with diameter growth of 4.5 cm and height of 457 cm in the age of 3 years old.