EFFECT OF CHEMICAL STIMULANTS ON OLEORESIN PRODUCTION AND WOOD QUALITY OF Pinus roxburghii Sargent
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Date
2023-07-12
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled “Effect of chemical stimulants on oleoresin production
and wood quality of Pinus roxburghii Sargent” was undertaken in the Department of Forest
Products, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan-173230 (HP) during
2020-2022 with the objectives to find out the effect of chemical stimulants and methods of tapping on
oleoresin production and quality, effect of chemical stimulants on wound healing of Borehole and Rill
method and effect of methods of oleoresin tapping on the wood quality of Chir Pine respectively.
Among the different chemical stimulants used for oleoresin tapping, treatment T7 (20 per cent H2SO4
+ 20 per cent HNO3) showed best results for oleoresin yield. Healing rate in both Boreholes and Rill
tapped blazes of Pinus roxburghii trees ranged from 4.64 (2.37) per cent to 96.25 (79.34) per cent. In
contrast to traditional methods, where healing of these Boreholes and Rill tapped blazes takes at least
2-3 years and 20-30 years respectively, but by the application of new chemical stimulants, especially
auxins like NAA (Napthalene Acetic Acid), rapidly healed the Boreholes and Rill
tapped blazes within a year. Oleoresin tapping methods had significant effects on physical, chemical,
and anatomical factors associated with wood quality. In order to improve oleoresin yield and wound
healing, different chemical stimulants can be tailored and modified such as CEPA can be replaced
with NAA, which can be used in combination with sulphuric acid which helps in prolonged resin
flow. NAA is an auxin that aids in cell differentiation and growth leading to rapid healing of wounds
caused by tapping, which could result in eco-friendly sustainable practices to ensure the long-term
health and productivity of trees.