EFFECT OF SEASONING ON THE WOOD PROPERTIES OF WILLOW CLONES
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Date
2021-10
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UHF,NAUNI
Abstract
ABSTRACT
The present work entiltled “Effect of seasoning on the wood properties of Willow clones” was conducted in the Laboratory
and Wood Workshop of the Department of Forest Products, College of Forestry, Dr. Y S Parmar University of Horticulture and Forestry,
Nauni, Solan, Himachal Pradesh, during 2019-20 and 2020-21. Seasoning of logs was done in air and water for a period of eight months.
The study revealed significant variation in physico-chemical and mechanical properties of seasoned wood of Salix clones. Among different
clones, the highest value of moisture content (49.36%) was recorded in 131/25 and minimum (43.42%) in NZ-1130. Among treatments, the
highest value of moisture content (113.45%) was recorded in green wood (T0) and minimum (12.11%) in air seasoned wood (T1). Among
clones, the highest maximum moisture content (167.32%) was recorded in 131/25 and minimum (125.28%) in J799. The highest maximum
moisture content (149.68%) was recorded in water seasoned (T2) and minimum (138.72%) in green wood (T0). Among clones, maximum
specific gravity (0.560) was recorded in J799 and minimum (0.488) in NZ-1179. The maximum specific gravity (0.535) was recorded in T1
and minimum (0.492) in T0. Among clones, the maximum value of radial (3.43%), tangential (6.92%), longitudinal (0.68%) and volumetric
(11.02%) swelling was recorded in J799, while minimum radial (2.09%), tangential (5.66%), longitudinal (0.32%) and volumetric (8.06%)
swelling was recorded in 131/25. The maximum value of radial (4.57%), tangential (10.22%), longitudinal (0.71%) and volumetric
(15.50%) swelling was recorded in T0, while minimum radial (1.63%), tangential (3.80%), longitudinal (0.28%) and volumetric (5.71%)
swelling was recorded in T2. Among the clones, maximum value of radial (2.70%), tangential (6.62%), longitudinal (0.68%) and volumetric
(9.99%) shrinkage was recorded in T0, while minimum radial (1.96%), tangential (4.46%), longitudinal (0.30%) and volumetric (6.98%)
shrinkage was recorded in T2. The maximum value of radial (3.82%), tangential (8.92%), longitudinal (0.82%) and volumetric (13.55%)
shrinkage was recorded in T0, while minimum radial (1.51%), tangential (3.56%), longitudinal (0.36%) and volumetric (5.43%) shrinkage
was recorded in T2. The maximum hot (9.40%) and cold (6.47%) water extractives were recorded in 131/25 and minimum hot (5.57%) and
cold (4.35%) water extractives were recorded in NZ-1130. The maximum alcohol benzene extractives (4.13%) were recorded in 131/25 and
minimum (2.34%) in J194. The maximum holocellulose content (78.16%) was recorded in 131/25 and minimum (69.49%) in J799. The
maximum lignin content (27.82%) was recorded in J799 and minimum (16.35%) in 131/25. The maximum hot water extractives (8.52%),
cold water extractives (7.12%), alcohol benzene extractives (3.84%) and holocellulose content (75.35%) were recorded in control (T0),
while the minimum hot water extractives (6.33%), cold water extractives (3.76%), alcohol benzene extractives (1.85%) and holocellulose
content (72.05%) were recorded in T2. The maximum value of tensile strength (0.074 kN/mm2), bending strength (0.009 kN/mm2),
compressive strength parallel to the grain (0.055 kN/mm2) and compressive strength perpendicular to the grain (0.018 kN/mm2) was
reported in J799. The minimum value of tensile strength (0.040 kN/mm2), bending strength (0.004 kN/mm2), compressive strength parallel
to the grain (0.033 kN/mm2) and compressive strength perpendicular to the grain (0.005 kN/mm2) was reported in 131/25. The maximum
value of tensile strength (0.065 kN/mm2), bending strength (0.007 kN/mm2), compressive strength parallel to the grain (0.050 kN/mm2)
compressive strength perpendicular to the grain (0.015 kN/mm2) was reported in T1. The minimum value of tensile strength (0.052
kN/mm2), bending strength (0.006 kN/mm2), compressive strength parallel to the grain (0.042 kN/mm2) and compressive strength
perpendicular to the grain (0.010 kN/mm2) was reported in T0. In case of clones maximum, modulus of rupture (0.197 kN/mm2), tension
modulus of elasticity (4427.50 MPa), compression parallel to the grain modulus of elasticity (1238.89 MPa), compression perpendicular to
the grain modulus of elasticity (413.89 MPa) and bending modulus of elasticity (116.38 MPa) was reported in J799. The minimum modulus
of rupture (0.197 kN/mm2), tension modulus of elasticity (2579.17 MPa), compression parallel to the grain modulus of elasticity (752.78
MPa), compression perpendicular to the grain modulus of elasticity (148.61 MPa) and bending modulus of elasticity (51.94 MPa) was
observed in 131/25. In case of treatments, maximum, modulus of rupture (0.166 kN/mm2), tension modulus of elasticity (4402.13 MPa),
compression parallel to the grain modulus of elasticity (1331.67 MPa), compression perpendicular to the grain modulus of elasticity (403.33
MPa) and bending modulus of elasticity (103.58 MPa) was reported in air seasoned wood (T1). In case of treatments, minimum modulus of
rupture (0.120 kN/mm2), tension modulus of elasticity (2040.83 MPa), compression parallel to the grain modulus of elasticity (558.33
MPa), compression perpendicular to the grain modulus of elasticity (145.28 MPa) and bending modulus of elasticity (56.94 MPa) was
reported in green wood (T0).