Abstract
The present investigation was conducted on a 22- year old Elm plantation established at Wadura campus of SKUAST-Kashmir. Four diameter classes viz., D1 (5-10cm), D2 (10-15cm), D3 (15-20cm) and D4 (>20cm) were stratified from the plantation and 24 trees (6 from each diameter class) were randomly selected and felled in the year 2015. The growth parameters of the trees increased with increase in the diameter class. The maximum height, dbh, basal area and stem volume were 14.98m, 23.77cm, 0.044m2 and 0.400m3, respectively. Biomass per tree of all tree components viz., stem, branches, foliage and roots showed significant increase with increase in the diameter of the trees. The total biomass, carbon stock and carbon dioxide equivalent increased from lower to higher diameter classes. The highest values observed for these parameters were 475.54 kg/tree (fresh), 148.59 kg/tree and 543.82 kg/tree, respectively under D4 diameter class. The biomass allocation coefficient of branch and root (BACb and BACr) attained higher values in lower diameter classes. The maximum and minimum values of these coefficients were 0.158 and 0.085; 0.298 and 0.278, respectively under D1 and D4 diameter classes. The size of trees did not produce significant effect on the biomass allocation coefficient of foliage (BACf). The diameter of the trees produced non-significant difference in the growth efficiency (GE) of different tree components.
Highlights
Ulmus wallichiana, the Himalayan Elm, is a fast growing tree species which grows in Himalayas from Kashmir to Uttarakhand between the elevations of 900 to 3000m amsl
The Himalayan Elm grows to a height of about 30m, with a broad crown having several ascending branches
The growth parameters of the trees increased with increase in the diameter class (Table-1)
Summary
The Himalayan Elm, is a fast growing tree species which grows in Himalayas from Kashmir to Uttarakhand between the elevations of 900 to 3000m amsl. Twenty four trees were randomly selected from the plantation (six from each diameter class) and harvested during the year 2015 for biomass and carbon estimation. Results and Discussion The growth parameters of the trees increased with increase in the diameter class (Table-1).
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