FLORISTIC AND CARBON STORAGE PATTERN IN TROPICAL DRY DECIDUOUS FOREST OF RANCHI EAST DIVISION, JHARKHAND
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Date
2019
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Birsa Agricultural University, Ranchi
Abstract
The study entitled “Floristic and Carbon Storage Pattern in Tropical Dry
Deciduous Forest of Ranchi East Division, Jharkhand”was conducted in Horhap
forest, Mahilong Range, Ranchi during the year 2018-2019. Which was conducted with
the following objectives: (i) To determine the vegetational composition and diversity of
Horhap forest (ii) To estimate the biomass and carbon stock of Horhap forest.
The entire area was divided into two sites. The study was conducted in five
different layers of dry deciduous forest. The variation in composition, structure,
diversity, biomass and carbon stock in different layers were quantified. Biomass for each
forest fragment was estimated using allometric equations based on the relationship
between girth of a tree and dry weight of component. The simple random sampling
procedure was followed.Quadrates of 10x10 m2 was taken for trees, saplings and shrubs.
While 2x2 m2 quadrates for seedling and 50x50 cm2 quadrates for herbs were taken.
A total of 1810 trees ha-1 representing 20 species and 15 families were
encountered in site I. Similarly, in site II a total of 1430 trees ha-1 representing 14
species and 12 families were found. The total tree basal area was varied between 35.97 to
48.01 m2 ha-1. A total of 1080 saplings ha-1 representing 18 species and 15 families were
encountered in site I. Similarly, in site II a total of 1240 saplings ha-1 representing 16
species and 13 families were found. The total sapling basal area was varied between 4.67
to 5.42 m2 ha-1. A total of 45500 seedlings ha-1 representing 14 species and 12 families
were encountered in site I. Similarly, in site II a total of 56500 seedlings ha-1
representing 14 species and 12 families were found. The total seedling basal area was
varied between 3.78- 3.88 m2 ha-1. A total of 7540 shrubs ha-1 representing 7 species and
6 families were encountered in site I. Similarly, in site II a total of 7740 shrubs ha-1
representing 6 species and 5 families were found. The total shrub basal area was varied
between 1.002- 2.25 m2 ha-1. A total of 299600 herbs ha-1 representing 17 species and 8
families were encountered in site I. Similarly, in site II a total of 476400 herbs ha-1
representing 22 species and 12 families were found. The total herb basal area was varied
between 0.68- 1.35 m2 ha-1. Shorea robusta showed highest value of IVI in tree sapling
and seedling layers, whereas Lygodium japonicum showed highest value of IVI in shrubs
and Cynodon dactylon showed highest value of IVI in herbs.
Shannon index ranged from 2.43-2.97 for trees, 3.07-3.08 for saplings, 2.21-
2.26 for seedlings, 1.53-1.65 for shrubs and 3.30-3.39 for herbs. The Concentration of
dominance were 0.24-0.33 for trees, 0.19-0.21 for saplings, 0.37-0.4 for seedlings, 0.46-
0.48 for shrubs and 0.13-0.14 for herbs. Equitability ranged from 0.92-0.99 for trees, 1.0
for saplings, 0.84-0.86 for seedlings, 0.85-0.86 for shrubs and 1.0 for herbs. Species
richness ranged from 1.79-2.53 for trees, 2.11-2.43 for saplings, 1.19-1.21 for seedlings,
0.56-0.67 for shrubs and 1.27-1.6 for herbs.
Total tree biomass recorded in site I was 386.91 t ha-1 of which 333.31 t ha-1
AGB and 53.6 t ha-1 BGB. Where as in site II total tree biomass was recorded 297.04 t
ha-1 of which 254.84 t ha-1 AGB and 42.2 t ha-1 BGB. Total sapling biomass recorded in
site I was 22.3t ha-1 of which 18.06 t ha-1 AGB and 4.24 t ha-1 BGB. Where as in site II
total tree biomass was recorded 24.23 t ha-1 of which 19.86 t ha-1 AGB and 4.37 t ha-1
BGB. Total seedling biomass recorded in site I was 9.23t ha-1 of which 7.14 t ha-1 AGB
and 2.09 t ha-1 BGB. Where as in site II total tree biomass was recorded 7.24 t ha-1 of
which 5.62t ha-1 AGB and 1.63 t ha-1 BGB. Total shrub biomass recorded in site I was
5.34t ha-1 of which 4.42 t ha-1 AGB and 0.92 t ha-1 BGB. Where as in site II total tree
biomass was recorded 2.803 t ha-1 of which 2.328 t ha-1 AGB and 0.475 t ha-1 BGB.
Total herb biomass recorded in site I was 1.49 t ha-1 of which 1.24 t ha-1 AGB and 0.25 t
ha-1 BGB. Where as in site II total tree biomass was recorded 297.04 t ha-1 of which
254.84 t ha-1 AGB and 42.2 t ha-1 BGB. The forest floor biomass in site I was recorded
389.1g m-2, of which leaves litter 176.46 g m-2, twigs 80.69 g m-2 and dead wood 131.95
g m-2. The forest floor biomass in site II was recorded 450.78 g m-2, of which leaves litter
227.06 g m-2, twigs 74.73 g m-2 and dead wood 148.99 g m-2.
Total carbon stock was recorded in tree 129.21- 168.43 t ha-1, sapling 9.56-
10.40 t ha-1, seedlings 3.07-3.91 t ha-1, shrubs 1.21- 2.3 t ha-1 and herbs0.72- 1.32 t ha-1.
In case of top soil (0-10 cm depth) status was varied form 5.54-5.55 for pH, 0.89 -1.06
for organic carbon (%), 293.895-330.12 for available N (kg ha-1), 15.75- 19.125 for
available P (kg ha-1), 140.625 -155.25 for available k (kg ha-1). Similarly for subsurface
(10-20cm depth) status was varied form 5.53-5.54 for pH,0.765-0.9 for organic carbon
(%),249.79-279.72 for available N (kg ha-1), 14.625 -17.44 for available P (kg ha-1),
137.25-150.75 for available k (kg ha-1).
Description
FLORISTIC AND CARBON STORAGE PATTERN IN
TROPICAL DRY DECIDUOUS FOREST OF
RANCHI EAST DIVISION, JHARKHAND