Oleoresin yield of Pinus merkusii trees from East Banyumas (original) (raw)
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Oleoresin has a very important place among the non-wood forest products throughout the world. In this study, oleoresin production from Pinus brutia Ten. was performed in KahramanmaraĢ, Türkiye according to the borehole method between July-October in 2014. Two different diameter classes were choosen, breast height 28-31 cm (Class I) and 32-35 cm (Class II). In each tree one hole on south aspect of stem was drilled. Different concentration of ethephon [2-chloroethyl phosphonic acid; (CEPA); (C)] (%3, %5, w/w), sulphuric acid (H 2 SO 4 [S]) (%10, %15, w/w) and a mixture of them (%3C+%10S, %3C+%15S, %5C+%10S, %5C+%15S) were sprayed in the boreholes to improve the resin flow. The highest resin yield was achieved with treatment of 5C+10S (%125.4) in diameter class I and with %15 sulphuric acid (%155.8) in class II as compared to nonstimulated trees. The effect of stimulant chemicals on resin yield was more evident in the trees of diameter class I.
The effect of stimulants and environmental factors on resin yield of Pinus merkusii tapping
2020
Oleoresin from Pinus merkusii is one of the most important forest products in Indonesia. The objective of this study was to examine the effects of various stimulants and environmental factors on oleoresin yield. The first factor was the stimulant treatment, i.e., SAEt1 (20% sulfuric acid + 1% Ethephon); SAEt2 (20% sulfuric acid + 2% Ethephon); SR4 (mainly composed by sulfuric acid); ETRAT (mainly composed by ethylene and citric acid); and without stimulant spraying. The second factor was the site with different altitudes, i.e., West Banyumas (326 m asl), East Banyumas (797 m asl), and West Pekalongan (1150 m asl). Through analysis of variance, the relation between stimulant and site was highly significant in regards to the average daily oleoresin yield. The results indicated that the combination of sulfuric acid and Ethephon increased oleoresin production 1.69- to 2.85-fold compared with untreated trees, depending on the sites. The trees with SAEt1 and SAEt2 treatments yielded an eq...
Tapping of Pinus Roxburghii (Chir Pine) for Oleoresin in Himachal Pradesh, India
The oleoresin is an important forest produce of pine forests in the world. The variation in the economics of resin tapping (oleoresin yield, cost of production) and oleoresin quality is influenced by method of tapping and chemical stimulants used for tapping, diameter of trees. Resin flow, a typical defense response in conifers, is controlled by various environmental factors. Different concentrations of Ethephon, sulphuric acid (isolated or in combination with CEPA) have also been tested. Higher resin yields were associated with summer, whereas rainy season had lower oleoresin yield. Ethephon in combination with sulphuric acid enhanced the oleoresin yield as compare to the isolated treatments. Trees exposed to stimulant ethephon 10%+20% H2SO4 resulted in higher oleoresin yields. Trees with larger diameter at breast height (38-40 cm) yielded more oleoresin than their smaller counterparts (30-32 cm). The oleoresin yield showed significant increase with increment in diameter of boreholes. In conclusion, cost reductions on resin tapping can be achieved by adjusting concentration of chemical stimulant, diameter of boreholes and managing subsets of trees in specific fashion based on DBH ranges.
Proceedings of the International Academy of Ecology and Environmental Sciences, 2023
Pinus roxburghii is one of the most important tree species used for resin tapping and for commercial purpose in Uttarkhand. The present study aim to investigate the relationship of Oleoresin production with morphological parameters. We have divided the three Oleoresin yield classes, i.e., high resin yielders (HRY's), medium resin yielders (MRY's) and low resin yielders (LRY's). The production potential of Oleoresin showed tends to increase with the various morphological parameters like diameter at breast height, number of bore holes. At the same time, bark thickness, tree needle length along with the thickness and colour of needle also has been tested which showed the positive correlation with the Oleoresin production. Further we have recorded significant differences in the diameter ranges 40-50 (12.99 ltr. = HRY'S, 28.30 ltr. in MRY'S and 7.27 ltr. in LRY'S) and 50-60 (10.82 ltr. = HRY'S, 3.2 ltr. in MRY'S and 6.05 ltr. in LRY'S) with maximum yield of Oleoresin in Chir pine. ANOVA showed that Oleoresin production vary significantly in all the categories of Oleoresin production (P<0.05) with respective to the different diameter ranges along with the bark thickness, needle length and colour. http://www.iaees.org/publications/journals/piaees/articles/2023-13(2)/1-Meena-Abstract.asp