STATISTICAL INVESTIGATION ON BIOMASS ATTRIBUTING CHARACTERISTICS OF Acacia catechu UNDER MIDHILL SUBHUMID CONDITIONS OF HIMACHAL PRADESH
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Date
2017-09
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled “Statistical investigation on biomass attributing
characteristics of Acacia catechu under midhill sub-humid conditions of Himachal Pradesh” was
carried out at two sites i.e Plantation (Site-I) and natural forest (Site-II) ecosystems at the campus of
Dr Y S Parmar University of Horticulture and Forestry, Nauni (Solan), Himachal Pradesh during the
year 2016. A random sample of 60 & 45 trees was selected from plantation (Site-I) and natural forest
(Site-II), respectively to record different growth characteristics i.e. diameter at breast height, tree
height, crown height, crown length, crown width and bole height. Stem biomass was estimated by
using non-destructive method whereas branch and leaves + twigs biomass were estimated by using
partial destructive method for biomass estimation. All tree characteristics showed non-significant
variations between two sites whereas bole height, total green and dry biomass showed significant
mean difference between two sites. More green and dry biomass were registered in Plantation (Site-I).
Green and dry biomass were positively correlated with all the growth characteristics. However,
maximum correlation of biomass was obtained with diameter at breast height followed by tree height.
Path analysis revealed that diameter at breast height was the most important characteristic of Acacia
catechu for biomass improvement. Linear function was best fitted function for the prediction of green
and dry biomass on the basis of diameter at breast height. Two Principal Components were extracted
which explained 55.224 per cent and 18.715 per cent of the total variation, respectively. Using factor
analysis, one factor was extracted which was a combination of diameter at breast height, tree height,
crown height, bole height and crown length and explained 51.912 per cent of total variation.
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