Ashish U. Nimkar , Kulwant Rai Sharma

Abstract

Studies were conducted to investigate the high resin yielders (HRYs) and check trees in Chir pine (Pinus roxburghii Sargent) for turpentine and rosin characters. The data on turpentine content, specific gravity of turpentine, relative flow rate of turpentine and rosin content exhibited significant variation in different high resin yielders and check trees in Pinus roxburghii, whereas the specific gravity and ash content of rosin were found to be nonsignificant. The maximum turpentine percentage was obtained in Ghandir-2 HRY (27.10%) and minimum turpentine was noticed in Chabal-check (18.50%). Highest specific gravity (0.8878) and relative flow rate (1.427) of turpentine was recorded in UHF-check and Chabal-check respectively, while lowest specific gravity (0.8415) and relative flow rate (1.378) of turpentine was noticed in Ghandir-2 HRY. The maximum rosin percentage was recorded in UHF-check (78.60 %) and minimum in Ghandir-2 (69.65%) HRY, whereas specific gravity and ash content of rosin ranged between 1.0301 to 1.0498 and 0.28 to 0.41 per cent, respectively. From this study it can be concluded that highest percentage of turpentine with lowest specific gravity of turpentine and rosin, relative flow rate of turpentine and ash content of rosin are the characteristic feature of high resin yielders and therefore, these parameters may be kept in mind while designing the selection indices for high resin yielders.

Keywords

Pinus roxburghii, Turpentine and Rosin, High Yielders, Check Trees

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Ashish U. Nimkar , Kulwant Rai Sharma , Soniya A. Nimkar

Abstract

Twenty six high resin yielders (HRYs) and ten check trees of Chir pine (Pinus roxburghii) marked at different locations of Himachal Pradesh were evaluated for monoterpene composition and their variation. Among monoterpenes, alpha-pinene content was highest in the Bumbloo-5B HRY followed by Ghandir-2 and UHF-3 HRYs. Beta-pinene + delta-3-carene is the major constituent with alpha-pinene and other terpenes the next in proportion and longifolene as minor constituent. The variation in alpha-pinene, beta-pinene + delta-3-carene, other terpenes and longifolene content may be due to degradation of one component into another. Knowledge of the variation pattern in monoterpene composition offers the possibility for identifying geographic origin for further improvement studies.

Keywords

Chir Pine (Pinus roxburghii Sargent), Monoterpene Variation, Turpentine, High Resin
Yielders (HRYs), Check Trees

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Ashish U. Nimkar , Kamal P. Mohapatra

Abstract

Research work on the various aspects of utilization of Populus deltoides have been reported. Literature was reviewed for sawing, wood working, carving, polishing, physical and mechanical properties, suitability for solid wood, seasoning and preservation, veneering and plywood, block board, pencil making, fibre board, cement bonded board, compressed wood, laminated veneer lumber and also structural wood developed from lops and tops for the benefit of wood processing industry as well as scientists engaged on various aspects of research work on poplar.

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Ashish U. Nimkar , Kulwant Rai Sharma

Abstract

Studies were conducted to investigate the high resin yielder and check trees in Chir pine (Pinus roxburghii Sargent) for anatomical parameters. The data on tracheid length, diameter of resin ducts and number of resin ducts per mm² exhibited significant variation in different high resin yielders and check trees in Pinus roxburghii. High resin yielders have shown slightly longer tracheids (5.35 mm) as compared to check trees (4.81 mm). All marked high resin yielders were exhibited maximum diameter of oleoresin ducts (0.20 mm) whereas, check trees recorded minimum (0.15 mm). Maximum number of resin ducts per mm² were found in high resin yielders (0.73) while, minimum number was observed in check trees (0.33). From this study it could be concluded that the tracheid length, diameter of resin ducts and number of resin ducts influences the oleoresin yielding capacity of the tree.

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