STUDIES ON EFFECT OF Lantana camara L. EXTRACT ON WOOD CHARACTERSTICS OF Morus alba L.
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Date
2023-12-16
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UHF Nauni
Abstract
The present research entitled “Studies on effect of Lantana camara L. extract on wood
characteristics of Morus alba L.” was carried out during 2021-22 and 2022-23 in the wood workshop and
laboratory of the Department of Forest Products, College of Forestry, Dr. YS Parmar University of Horticulture
and Forestry (Nauni), Solan (HP). Wood samples of Morus alba L. were prepared and dipped in different
concentrations of 0.25, 0.50 1.00, 1.50 and 2.00 per cent (w/v) for Lantana camara L. leaf extract (using petroleum
ether, methanol and water solvents) solution for 72 hours and were analyzed for variation in physico-chemical and
mechanical properties of Morus alba L. wood. Significant results were obtained from the variation in physical,
chemical, mechanical and effect of paint concentrations on physical properties of wood treated with Lantana
camara L. leaf extract prepared in different solvents. The highest maximum moisture content (119.02%),
volumetric swelling (8.96%) and shrinkage coefficient (6.70%) were recorded in water extract treated samples,
whereas, lowest maximum moisture content (115.49%) volumetric swelling (8.34%) and shrinkage coefficient
(6.35%) were recorded in petroleum ether extract treated wood samples. Maximum values for maximum moisture
content, volumetric swelling and shrinkage coefficient were recorded in untreated samples and minimum at 2 per
cent extract concentration. Maximum specific gravity (0.555) was recorded in petroleum ether extract treated
samples and minimum (0.544) in water extract treated wood samples. Chemical properties including cold water,
hot water and alcohol-benzene soluble extractives were recorded maximum at 2 per cent and minimum in
untreated samples. The highest values for cold water-soluble extractives (4.59%), hot water-soluble extractives
(6.30%) and alcohol-benzene soluble extractives (10.78%) were recorded in water extract treated samples, while
lowest values for cold water-soluble extractives (4.38%), hot water-soluble extractives (6.01%) and alcoholbenzene
soluble extractives (10.45%) were observed in petroleum ether extract treated samples. The holocellulose
and lignin content ranged from 69.41 to 69.51 per cent and 21.82 to 22.12 per cent, respectively. The highest
values for tensile strength (0.069kN/mm2), bending strength (0.010kN/mm2), compression strength parallel to
the grain (0.061kN/mm2) and compression strength perpendicular to the grain (0.021kN/mm2) were observed in
petroleum ether extract treated wood samples, whereas, the lowest values for tensile strength (0.064kN/mm2),
bending strength (0.007kN/mm2), compression strength parallel to the grain (0.057kN/mm2) and compression
strength perpendicular to the grain (0.017kN/mm2) were recorded in wood samples treated with water extract.
Highest values for all mechanical properties were recorded at 2 per cent concentration, while minimum in
untreated wood samples. Significant results were also obtained for different physical properties of wood treated
with different paint concentrations. The highest (134.09%) maximum moisture content was observed in absolute
control, while lowest (31.53%) in wood samples treated with 100 per cent paint concentration. Maximum
volumetric swelling (10.69%) and shrinkage (9.66%) co-efficient were recorded in absolute control, whereas,
minimum volumetric swelling (3.30%) and shrinkage (0.69%) were observed in samples treated with 100 per cent
concentrated paint.