Abstract
Wood chemical composition and specific gravity of provenances belonging to two different species of Acacia viz., Acacia mangium, and Acacia auriculiformis were evaluated and compared. The experimental material studied was from 13 years old trees growing in a provenance trial laid out in RBD with three replications in the instructional farm of College of Forestry, Kerala Agricultural University, Vellanikkara, Thrissur, Kerala. The provenances were analyzed for α-cellulose and acid insoluble (Klason) lignin. Fresh, air dry and oven dry wood specific gravity of Acacia provenances were estimated. The result showed that A. auriculiformis averaged higher cellulose (33–42 %) and lower lignin (12–20 %) compared to A. mangium. Also A. auriculiformis provenances showed higher values for fresh, air and oven dry wood specific gravity compared to A. mangium provenances. The values in chemical composition and specific gravity for the provenances of both the species fall within the accepted range for pulp and paper making. From this study with biometric characters, the best performing provenances of both these species can be selected for large scale afforestation in the present agro-climatic conditions. The study reveled that there is no significant difference between the two species regarding the characters that were studied.
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