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Estimation of Biomass Carbon Stock at Three Plantation Sites in Sher-e-bangla Agricultural University Campus

Md. Shariful Islam
Department of Agroforestry & Envir. Science, Sher-e-Bangla Agricultural University.

Md. Forhad Hossain
Department of Agroforestry & Envir. Science, Sher-e-Bangla Agricultural University.

Md. Mizanur Rahman
CEGIS, Dhaka.

Abstract/ Executive Summary:

Urban forests play an important role in mitigating hazards evolved due to climate change through sequestering atmospheric carbon dioxide. The study was conducted at three plantation systems in Sher-e-Bangla Agricultural University Campus (SAU) aiming at exploring floristic composition, stand characteristics and biomass carbon stocks. Both purposive (Woodlot and home garden) and systematic sampling method were followed. A total of 35 genera and 41 tree species that were belonged to 25 families were recorded in SAU campus. Among the three plantation systems, home garden was found rich in species composition followed by woodlot and roadside. Mangifera indica was found dominant species in SAU (IVI=17.25 %). Stem density and Mean DBH were significantly varied among the three plantation systems (p < 0.05), while basal area and biomass carbon (Above - and below ground) were exhibited with insignificant difference (P > 0.05). The average biomass carbon stocks for roadside, home gardens and woodlot were 159.18±36 Mg ha^-1, 169.37±34 Mg ha^-1 and 206.19±42 Mg ha^-1 , respectively. When three plantation systems considered as whole, the mean biomass carbon, basal area, stem density, mean DBH were 174.24±21 Mg ha^-1, 34.16±3.51 m²ha^-1, 1096.87±121.10, 19.83±1.63 cm, respectively. This study reveals that the urban institutional forest is rich in terms of plant species diversity and carbon stocks.

Keywords: Urban forest, Climate change, Plant diversity, Biomass carbon stocks

Location: Sher-e-Bangla Agricultural University Campus

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Non-commodity: Land degradation

Objectives:

To study the Sher-e-Bangla Agricultural University Campus as a model of urban institutional forest carbon assessment in Bangladesh.

Methodology:

A total of 32 sample plots of 10 x 10 m² size were selected (0.01ha), each were laid out in all the three plantation sites. Ten (10) plots along the roadside, 15 from home garden and seven (7) from woodlot were laid out at three plantation sites. Both purposive (Woodlot, and home garden) and systematic sampling method (roadside) were followed to measure the floristic composition of species in study area. The basal area, relative density, relative dominance, relative frequency and Importance Value Index (IVI) of tree species were also calculated. The total carbon stock of the tree was measured by non-destructive method using equations involving the DBH (diameter at breast height, height for palm species) and wood density. The girth of each individual was converted to tree diameter, dividing the girth by π (3.1416) due to lack of DBH instrument. The total biomass was measured in terms of above ground biomass (AGB) and below ground biomass (BGB) of each tree species found in sample plots. The AGB was measured based on the allometric equation develop for tropical trees that can be used for wide graphical and diameter range. The BGB was measured based on regression model. The AGB of palm species were measured based on the equation. The specific density of the trees for Above Ground Biomass calculation was taken from Global wood density database standard average value of tree species FAO’s list of wood densities for tree species from tropical Asia. After estimating the biomass from allometric relationship it will be multiplied by 0.5 as wood contains half percent of carbon of it’s total biomass.

Source of Information: Procedings of Research Review 2014-15 and Programme Planning 2015-16 on Agroforestry Research Activities in Bangladesh, Forestry Unit, NRM Division, BARC, Pp:49-54

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

From the result of this study management of existing vegetation, and increasing in vegetation cover at the studied area, are likely to be more effective strategies for retaining carbon in the landscape and potentially increasing carbon sequestration. Present study will facilitate to get more complete understanding of the organic carbon sequestration potential of different types of plantations in urban institutional areas.

Knowledge Management: Report/Proceedings