Effect of Resin Tapping Methods on Oleoresin Quality in Blue Pine (Pinus wallichiana A B Jackson)

摘要

Two resin tapping methods i.e. rill method and borehole method were used to evaluate the oleoresin quality. The quality of oleoresin obtained by borehole tapping method was superior and contained more monoterpene composition of turpentine as comparedto rill method of oleoresin tapping. The turpentine contents were found significantly higher in borehole method of tapping. The specific gravity of borehole turpentine was lower than the turpentine obtained through rill method, whereas the relative flowrate was higher in borehole turpentine as compared to rill method. Monoterpene composition i.e. alpha-pinene and limonene were higher in the turpentine of borehole nnethod, but camphene, beta-pinene and other terpenes were higher in rill method. The rosincontent, specific gravity of resin, ash content and iron contents were lower in borehole method thanrill method.