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
Hie coastal environment of Bangladesh
is highly unstable due to direct exposure of
the wind and wave action of the Bay of
Bengal, Moreover, the lite and properties of
die coastal area is alway s at risk (Saenger and
Siddiqi 1993). The newly accreted coastal
lands are not .suitable for any land practices
except afforestation because of a number of
unpredictable geo-morphological changes,
viz. rapid accretion, sand smoothon ing,
sediment winnowing and rapid sillation or
sand dune movements (Das and Biddiqi
1985). Hie pneumatophores of coastal
plantation species spread up laterally and
persist within (he silt layer for a longer time
which also hasten the procedure of
depositing and fixing sills, and thus helps in
stabilization of lands (Siddiqi 2(MH).
Bangladesh is a pioneer country for coastal
plantations (Siddiqi 2001). It is believed that a
permanent green belt along the shoreline and
near the shore and offshore islands of
Bangladesh would considerable reduce the
losses incurred from Ute frequent cyclones
and tidal surges, 11 will abo increase forest
resources and provide ecological security to
the whole coastal area.
Lotkon defoliator, Cyclosia papilionaris Drury (Zygaenidae:Lepidoptera) is a major
insect pest of lotkon (Baccaurea ramiflora Lour.) in Bangladesh. The larva feeds on young
leaves and cause defoliation seriously affecting the growth of the tree. Description,
distribution, nature and impact of damage, host plants, life stages, number of
generation, seasonal abundance and management of the pest has been described. The
peak infestation occurred during July and August. The incidence is more acute in the
hilly areas than in the plains. The pest could be controlled by the foliar application of
malathion (Malathion 57 EC) at 0.1% concentration.
The response of rajkoroi (Albizia richardiana King and Prain) wood for making
pulp in NS-AQ (Neutral Sulphite Anthraquinone), soda, soda-AQ and kraft pulping
processes was assessed by different alkali doses and pulping time. The temperature
was maintained at 170°C in all cases. Results showed that the species was not suitable
for making pulp in NS-AQ process. Pulps could be made in soda process but the
amount of uncooked material (rejects) was high. Addition of 0.1% AQ in soda liquor
gave better results in delignification. The species responded very well towards kraft
process. Bleachable grade kraft pulp was obtained even with 14% active alkali with a
pulp yield of 48.2%. The pulp yield of rajkoroi was
species widely used in pulp and paper mills of Bangladesh.
Hand sheets from soda, soda-AQ and kraft pulp of rajkoroi were made. The
physical strength properties likely tear, tensile and burst were evaluated. Kraft pulp
was superior to the pulp produced either in soda and soda-AQ processes but slightly
inferior to the pulp produced from commonly used hardwood species. The pulp of this
species could be blended with imported softwood pulp for making moderate quality
writing, printing and wrapping paper
In this paper the anatomical properties and extractive content of four traditionally
used wood species, viz. itchri (Anogeisus acuminata Wall.), kochoi (Bridelia retusa
Spreng.), sil-bhadi (Garuga pinnatn Roxb.), and goda (Vitex pedunciilarlis Wall.), of
Bandarban Hill District in Bangladesh have been studied. All the wood species under
the study have tyloses with narrow lumens. The extractive content of the sapwood of
the species varies from 4.16 to 6.89 percent in cold water. The highest percentage was
in itchri (6.89%) followed by goda (6.65%) and 5.9% in kochoi and lowest in sil-bhadi.
The hot water extractive content varies from 6.88 to 8.76 percent with highest percent in
itchri (8.76) followed by sil-bhadi (8.08), goda (8.02) and 6.88 in kochoi. The heartwood
extractives in cold water were 7.21% in goda followed by 7.12, 6.43 and 6.15% in itchri,
kochoi and sil-bhadi respectively. The hot water extractive content was higher in itchri
(9.84%), followed by 8.97% in sil-bhadi, 8.7% in goda and 7.75% in kochoi. Both
anatomical properties and extractives contents are
durability of these species
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.
The effect of nailing density in agar formation through artificial wounding was
observed in agar trees. Five different nailing densities like; 1 cm x 1 cm, 2 cm x 2 cm, 3
cm x 3 cm, 4 cm x 4 cm and 5 cm x 5 cm were used as treatments in 25 selected agar
trees in three locations with the five experimental sites, Boroduara (Chittagong),
Fashiakhali (Cox’s Bazar), Bagaihat (Rangamati), Bagmara and Lathitila (Moulvibazar).
The age of the treated agar trees were 8,10 and 15 years respectively. The experiment
was conducted in June 2008 and agar wood core samples were
of the nailing treatments. Among the different densities, 4 cm x 4 cm nailing distance
was found to be the best nailing density for maximum agar formation. On an average,
95 ?o oleoresin deposit was found in 15 years old agar tree.
Aboveground nighttime respiration behavior of Kandelia obovata Sheue, Liu and
Yong was measured from 10 sample plants growing in the mangroves of Okinawa
Island, Japan. The dependence of the respiration on the tree size was successfully
represented by a power function of Do 1h2H. The respiratory behavior of K. obovata was
found dependent to size and the exponent was close to 3/4. The size-dependence of
respiration could be successfully represented by a power function of D01h2H.
A field experiment was conducted for 4 years on patipata to find out the
relationship between planting spacing and yield potential. Three different propagules
viz. rhizome, branch cutting and rooted branch cutting were used as propagating
prologules. Production of average number of harvestable culms ranged from 506 to 560
plot’1 of 18 m2 area maintained in five different spacing on a four-year harvesting cycle
Natural regeneration status of native tree species in Dudhpukurta-Dhopachori Wildlife
Sanctuary (DDWS) In Chittagong South Fores! Division, Bangladesh was through
stratified random sampling method. A total of 120 tree species belonging tn If, families were
recorded from 125 plots of 5 m x 5 m in size. Moraceae and Euphorbiaceae families were
represented by maximum number (11) of species, where maximum individuals {TH) no. were
recorded for Dipterotarpaceae tantih from the sampled area (0.3125 ha). Family Relative
Density (FRD), Family Relative Diversitv (FRDI) and Family Importance Value (FIV) index ot
the regenerating tree species were highest for Diptenxarpacw < 15.), Moraceae (9-17 ■■! and
Euphorbiaceae (20.5) family respectiveiv. Dtpfrtmirpj^ tarbiiMtas was represented b\
maximum seedlings per hectare (1078) foftowed by Cm™ nemsa (464) and Apumsrt ioJhiluf
|4fi4). Seven biological diversity indices were also calculated which ensures promising
regeneration status of DDWS. Percentage distribution of seedlings of all species was maximum
(80.62%) for the height range of 0-50 cm. Number of seedlings were found to reduce
proportimatelv with height growth that indkates poor recruitment of the seedlings in the
Wildlife Sanctuarv area. However, Ar#ixutr5 citwa was found tn show maximum (8.91%)
seedling recruitment percentage. Considering the findings, it is emphasized the need ot a
management plan based on natural regeneration potential for the effective functioning of
Dudhpukuria-1 fhopadmri Wildlife Sanctuary,
Coastal plantations mainly with SiMHerafifl fluids have been established by the Forest
Department on the newly accreted lands in the coastline of Bangladesh since 19*65-66, An
underplanting trial of 11 mangrove species was conducted in the existing S. ajritila plantations
along the western coastline [Patuakhali and Bhda) to assess the site-suitability and growth
performance of these species. Sun ival, height and diameter growth data from 16-21 years old
experimental stands of these species were analyzed. The highest survival was found in
EYCurrmu agallodin (62% and 59%) followed bv fiws (51% and 39%) and Xj/lucujpj(s
wAorigeusrf; (48% and 26%) among the I rec species at Rangaba 11 island of Patuakhali and Char
Kukri-Mukri island of Bhcla district. Among the shrub and palm species, the highest survival
was found in twruridu/mw (63%) followed bv fVwju.T ptiudtWJ (58%) and Nyjw
fndieain (4Q%) at Rangabali and the highest survival in P. p/dtithmti (71%) followed be N.
fnitnnus (56%) and A. cornkwtaftmj (46%) at Char Kukri-Mukri. The mean maximum height
growth was observed in E. (9.31 m and 9.29 m) followed by X. Miefcoji^usjs (6.84 m and
6.84 m) and H. Jews (6.19 tn and 5.65 m) in both Ute areas. The mean maximum diameter
growth was also observed in F. flrgnPoc/ifT (9.83 cm and 9.49 cm) followed by X, JMcAragrtisrs (7,97
cm and 7.34 cm) and (5,87cm and 5,34 cm) in bold Ihe nreas. Among the shrub and
palm species, A. curwkwMfwwr, P. pultidier and N. fridtmrs showed good height growth
performance in both die study areas, Therefore, these promising mangrove species (E. rtgiTifodm,
IE follies, X. luekiut^Hsis, A. amtfoulaiittH, P. pithkfcsw and M/hrfk’ims) may be suitable for raising
second rotation crops inside S. tqvtaJa plantations for sustainable management of coastal
forests
Welcome to the Bangladesh Journal of Forest Science (BJFS) – a leading platform for advancing the knowledge and understanding of forest science in Bangladesh and beyond. Established with a commitment to excellence, BJFS serves as a cornerstone for researchers, practitioners, and enthusiasts dedicated to the sustainable management and conservation of forest ecosystems.
