EFFECT OF SPACING ON GROWTH AND WOOD PARAMETERS OF WILLOW CLONES
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Date
2021-10
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UHF,NAUNI
Abstract
ABSTRACT
The present research entitled “Effect of spacing on growth and wood parameters of
willow clones”. The three clones (J-799, J-194 and Kashmiri) were planted in plantation
densities of 1 × 1 m (10000 plants/ha), 1 × 2 m (5000 plants/ha) and 1 × 3 m (3333 plants/ha)
in randomized complete block design in the year 2017 in the Khaltoo experimental field of
the department of Tree Improvement and Genetic Resources. Three-year-old growth and
coppice growth of one year was recorded. The plant height (5.86 m) recorded in three-yearold
plantation significantly higher in closest spacing (1 × 1 m) and lowest (3.93 m) in widest
spacing (1 × 3 m). The plants planted in widest spacing recorded maximum (6.82 cm) basal
diameter. Volume index per hectare basis was maximum (173.61 m3 ha-1) in spacing of 1 × 1
m. Maximum total green biomass per hectare (730.90 q/ha) was recorded in 1 × 1 m and
(730.21 q/ha) in J-194 clone. Wood physical properties, fibre length (0.72 mm) and moisture
content (84.14 %) were observed maximum in Kashmiri clone. Lignin content (21.69 %) was
recorded maximum in 1 × 3 m. The maximum height (3.88 m) in one year old coppice
recorded in 1 × 1 m and maximum coppice diameter (2.86 cm) was recorded in 1 × 3 m.
Volume index of coppice per hectare (13.37 m3/ha) was recorded maximum in 1 × 1 m and
minimum (7.71 m3/ha) in 1 × 3 m. Therefore, the spacing of 1 × 1 m was found more suitable
for maximising growth for raising the willow crops in short rotation forestry.