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Research Article Volume 8 Issue 1
Extractive contents of Acacia aulacocarpa wood grown in Indonesia
Doly Lumban Tobing, Ganis Lukmandaru
Received: November 25, 2025 | Published: December 9, 2025
Citation: Tobing DL, Lukmandaru G. Extractive contents of Acacia aulacocarpa wood grown in Indonesia. Open Access J Sci. 2025;8(1):298-301. DOI: 10.15406/oajs.2025.08.00276
Abstract
Acacia aulacocarpa timber is distributed in several regions of Indonesia. Although the wood has been utilized for various end products, information on its wood properties remains limited. This study aims to provide information on inter-tree and intra-tree variations in extractive contents. The samples used in this study were three A. aulacocarpa individual trees (27 years) grown in Wanagama Educational Forest, Gunung Kidul, Yogyakarta. The variables were radial direction (inner heartwood, outer heartwood, and sapwood) and vertical direction (bottom, middle, and top parts). The sawdust samples were extracted successively using n-hexane, ethanol, and hot-water solvents. Then, the total phenolic content was (TPC) measured in ethanol soluble extracts. The n-hexane, ethanol (ESE), and hot-water (HSE) soluble extractives of the three individual trees ranged from 0.24-0.79%, 3.33-10.88%, and 0.80-1.52%, respectively. Total extractive contents (TEC) and total phenolic contents (TPC) ranged from 4.60-13.18% and 100-398 mg GAE/g, respectively. Analysis of variance showed that radial direction significantly affected ESE, HSE, TEC, and TPC levels. A significant difference between sapwood and heartwood was also observed. However, no significant differences were found between inner and outer heartwood. No significant effect of vertical direction was observed for any parameters. A moderate significant correlation (r=0.69**) was found between ESE and TPC values.
Keywords: wood chemistry, heartwood, within-tree, phenolics, axial direction
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