BANGLADESH JOURNAL OF FOREST SCIENCE
A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
Plantation Trial Unit Division of Bangladesh Forest Research Institute (BFRl) carried out a research in the western coastal area of Bangladesh during 2018—2020 in order to assess the growth of Sonneratia apetala (Keora) in relation to stand age. For this purpose, in the Char Kukri-Mukri area, 32 PSPs were established for eight age classes (11, 15, 20, 30, 35, 40, 42, and 45 years), and in the Rangabali area, 28 PSPs were established for seven age classes (30, 35, 42, 44, 45, 48, and 50years), followed by a stratified random sampling method. A significant difference was found (p < 0.05) for the height and diameter at breast height (DBH) growth of S. apetala stand among the different ages of plantation in both areas. At the Char Kukri-Mukri area, for 11 years old plantation found the highest height (0.357m) and DBH (0.570cm) growth rate after 1 year and continued after 2 years (0.662m; 1.085cm). On the other hand, for a stand age of 30 years, the highest height (0.216m) and DBH (0.246cm) growth rate were found in the Rangabali area after 1 year and continued after 2 years (0.353m; 0.390cm). A positive and strong relationship was found between height and DBH growth
rate after 1 and 2 years (r=0.850 and r=0.891) in the Char Kukri-Mukri area respectively. On the other hand, a positive and very strong relationship was found between height and DBH growth rate after 1 and 2 years (r=0.931 and r=0.913) in the Rangabali area
successively. This result will aid in the selection of appropriate forest management practices for managing S. apetala plantations on a sustainable basis in the western coastal belt of Bangladesh.
A comparative growth study of Avicennia officinalis, A. alba and A. marina along
the eastern shorelines of Bangladesh showed an average annual diameter increments of
0.99, 0.90 and 0.97 cm respectively for plantations varying 11 and 16 years age. Average
annual height increments of these species were 0.31, 0.37 and 0.31 m respectively.
Annual volume production per tree was 0.025, 0.025 and 0.024 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 plantations. 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.
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