GUN MARDIATMOKO
Abstract
Climate change challenge is real and urgent in the world including Southeast Asia. The rain tree (Albizia saman Jacq. Merr.) is becoming more important and recognized as having a major role in carbon storage to address climate change. This paper is to describe and discuss a method to estimate the above and below-ground biomass and to determine root-to-shoot ratio and biomass expansion factors of young rain tree in Ambon Island, Indonesia. The carbon mass equation model was constructed based on a significant relationship between carbon mass of young rain tree and its diameter at 3 cm height and tree height. In order to analyze the biomass content, a destructive sampling technique was used. After felling, dimensional measurement was performed for each tree. The results of the study showed that the equation model for estimating above and below-ground biomass of rain tree was allometric equation: Y = -10,310.50 + 1,820.89X1 + 10.89X2 where X1 = Diameter and X2 = Height, R Square (adj) was 0.847 and SE was 1,540; root-to-shoot varied from 0.09 to 1.09 with a mean of 0.548 and biomass expansion factors varied from 1.17 to 3.41 with a mean of 1.896.