STUDIES ON MECHANICAL AND PHYSICO-CHEMICAL PROPERTIES OF CEDRUS DEODARA (ROXB.) G.DON
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Date
2016
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ABSTRACT The present research investigation entitled “Studies on mechanical and physicochemical properties of Cedrus deodara (Roxb.) G.Don” was carried out in the department of Forest Products, College of Forestry, Dr Y S Parmar university of Horticulture and Forestry, Nauni, Solan (HP) during the years 2014-15 and 2015-16. Chemical analysis was carried out by employing TAPPI (Technical Association of Pulp and Paper Industry) standard methods. The mechanical strength properties were determined on UTN-10 (Universal Testing Machine) by following standard procedures. The result revealed that maximum moisture content was observed in wood samples collected for Nankhari (91.09%) population. Highest specific gravity (0.5138) and tracheid length (4.82 mm) were recorded for the samples collected from Chopal. The chemical properties viz. Cold water soluble extractives, hot water soluble extractives, alcohol benzene extractives, lignin content and holocellulose content ranged between 4.62-5.86 per cent, 5.78-7.01 per cent, 9.10- 12.01 per cent, 22.98-27.92 per cent and 64.45-70.06 per cent, respectively. Samples collected from Kandyali population showed maximum cold water solubility (5.86%), hot water solubility (7.01%) and alcohol-benzene extractives (12.01%). Highest lignin content (27.925) was recorded for Chhichhad population and holocellulose content (70.06%) was noticed to be maximum at Dahiya. The bending strength (0.0038 kN/mm2), tensile strength (0.0438 kN/mm2), compression perpendicular to grain strength (0.0282 kN/mm2) and compression parallel to grain strength strength (0.068 kN/mm2) were noticed to be maximum in Kufri samples. MOR (0.00045 kN/mm2) was found to be highest for samples collected from Chopal population. Out of total 101 combinations of simple correlation coefficients, 25 were found to be positive and significant and 8 were found to be negative and significant. R2 value for specific gravity was noticed to be highest due to different physico-chemical parameters under study. Highest heritability (H2) was recorded for specific gravity (99.58%). The phenotypic coefficients of variation were noticed to be higher than genotypic coefficients of variation.
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amines, grain, yields, planting, sowing, irrigation, wheats, seed treatment, concentrates, land resources, physicochemical properties , Cedrus deodara (Roxb.) G.Don, amines, grain, yields, planting, sowing, irrigation, wheats, seed treatment, concentrates, land resources