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Comparative Growth of Avicennia Officinalis L., A. Marina (forsk) Vierh and A.alba B1. in the Eastern Shorelines of Bangladesh

M. J. Alam
Bangladesh Forest Research Institute(BFRI) P.O. Box 273, Chittagong-4000, Bangladesh.

N. A. Siddiqi
Bangladesh Forest Research Institute (BFRI), P.O. Box 273, Chittagong-4000, Bangladesh.

Abstract/ Executive Summary:

A comparative growth study of Avicennia officinalis,A.alba and A. marina along the eastern shorelines of Bangladesh showed as average annual diameter increments of .99,.90 and .97 cm respectively for plantations varying 11 and 16 years age. Average annual height increments of these species were .31, .37 and .31 m respectively. Annual volume production per tree was .025, .025 and .024 m3 respectively. All the individuals of Avicennia species had a promising growth and the plantation was successful along the eastern coast of the country. On the contrary much human interference was observed on the established plantation. The growth of Avicennia officinalis, A. alba and A. marina showed that plantation areas and newly accreted lands may be suitable for planting with Avicennia species.

Keywords: Avicennia spp, Biotic interference, Diameter, Height, Increment, Volume.

Location: The coast of Cox's Bazar region

Start Date: 01-07-2006

End Date: 30-05-2007

Program Area: Crop-Soil-Water Management

Non-commodity: Teak

Objectives:

To obtain a clear idea about growth performance of the existing three species of Avicennia.

Methodology:

Young plantations of age vary from 11 and 16 years old Avicennia were selected in the coast of Cox's Bazar region (latitude 20°30' and 20° N; longitude 90°45' and 92°15' E). Initial information about the different species of Avicennia was collected from the plantation journals and information from forest personnel and confirmed by subsequent field visit. In all 36 plots were undertaken during 2006. Data collecting spots and planting areas were selected following in initial survey along the shorelines. Avicennia trees were demarcated at a random at each plot and plot size was 5 m x 5 m. Data on height and diameter of trees were recorded using hypsometer and diameter tape respectively. Volume was estimated from volume equations. Ten trees of each species were measured in a plot. Trees for measurement were identified at six plots in different locations in the inter-tidal areas. Thus, a total of 180 trees for each species of Avicennia were measured. Overall condition of the stand, survival, site condition and biotic interference were also noted. Soil textures of the sites were cited from literature and salinity was measured using refractometer. Duration and frequency of tidal inundation were noted through direct observations and discussion with the fishermen.

Source of Information: Bangladesh Journal of Forest Science, Vol. 32(1), Page no. (62-67),Jan-Jun, 2012, BFRI, Chittagong.

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The growth performance of Avicennia officinal is, A. alba and A. marina was satisfactory in comparison with other available mangrove species. Along the eastern shorelines, the initial plantation success was good. However, the plantation became subject to tremendous human interference in the form of shrimp farm expansion, salt production practices, illicit tree cutting and cattle grazing. Considering protective role of coastal plantation against cyclone, storm surge and Tsunami, the degraded areas or newly accreted land in the eastern shoreline may be reforested or afforested with Avicennia species. There is no significant difference in volume production among three Avicennia species. Survival of the three species was not reported earlier in the eastern coastline. Since there is no remarkable difference in volume production among the species, it may be recommended to plant all the three species to conserve species diversity.

Knowledge Management: Journal