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TAPPING OF OLEO-RESIN FROM DIPTEROCARPUS KERRII
Ibrahim Jantan, Abu Said Ahmad and Abdul Rashih Ahmad
Journal of Tropical Forest Science
Vol. 3, No. 4 (June 1991), pp. 348-355
Published by: Forest Research Institute Malaysia
Stable URL: http://www.jstor.org/stable/43594411
Page Count: 8
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A survey was conducted on the tapping of Dipterocarpus kerrii for its oleo-resin by the Orang Asli (aborigines) Tasek Bera and Buloh Nipis. The method of tapping currently employed leads to the destruction of some wood and the production of low yield and poor quality oleoresin. The tapping technique was improved by applying the bark-chipped method with aqueous sulphuric acid solution as a stimulant. The optimum concentration of the aqueous acid used to stimulate maximum oleo-resin flow was determined. This method proved to be advantageous and economical since minimal concentration of aqueous sulfuric acid solution could be used to produce optimum yield and better quality oleo-resin with less damage inflicted on the tree.
Journal of Tropical Forest Science © 1991 Forest Research Institute Malaysia