bjfs_logo-removebg-preview

BANGLADESH JOURNAL OF FOREST SCIENCE

A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute

ISSN - Print: 1021-3279 | Online: -
Abstract:

A study was conducted with 15 lesser used/unused medium density
(0.52-0.68) wood species of Bangladesh to determine their hardboard making
characteristics. The species tested were barta (Artocarpus lakoocha), chalta (Dillenia
iiidica), dakroom (Mitragyna rotundifalia), gab (Diospyros peregrine), hargaza (Dillenia
pcntagynn), jhumka bhadi (Engelhardtia spicata), kamdev (Calophyllum polyanthum),
kao (Garcinia cowa), kasturi (Cinnamomum cecidodaphne), kerung (Pongamia pinnata),
moos (Pterospernium acerifolium), pairag (Canarium risiiiiferum), rata (Aphanamixis
polystachya), tali (Palagttiuni polyanthum) and uriam (Mangifera sylvatica). It wasfound
that all the species except barta, kasturi and uriam produced good or even better
quality hardboard than that ofsundri (Heritierafames) a widely used wood species in
Khulna Hardboard Mills

Abstract:

The exact flowering cycles (from seed to
seed) ofbamboos are known for few species. Most
of the pastreports on bamboo flowering cycles are
based on speculation and estimation (Hasan 1973,
Banik 1991). The flowering cycles for many
species of bamboo from India, Bangladesh and
Myanmar were reported (Cavendish 1905,
Blatter 1930, Bor 1941, Hasan 1973, Bahadur 1980,
Naithani 1990, Banik 1991, Alam 1995). This paper
presentsthe estima ted flowering cycles ofBambusa
burmanica Gamble, B. cacharensis Majumdar and
B. jaintiana Majumdar based on past records and
recent flowering (Table 1)

Abstract:

In 1990, a serious root rot disease was
observed in different strip plantations of Court
Chandpur-Subdalpur railroad, Jessore-Benapole
highway and Jessore-Satkhira road of greater
Jessore district. These plantations were covered
with trees such as Cassia siamea, Acacia
auriculiformis, A. nilotica, Albizia procera, Leucena
leucocephala and Dalbergia sissoo. The affected trees
died in patches showing wilting symptoms. C.
siamea, A. auriculiformis and A. procera were
affected most, whereas A. nilotica, L. leucocephala
and D. sissoo were least affected. The leaves of the
diseased trees became brown, dried up and
remained attached to the dead branches. After
excavation of roots, whitish mats of mycelia were
observed on the branch and anchor roots of the
trees. Typical fruit bodies were seen on the collar
region, exposed roots and on Clerodendruni
viscosum and Glycosmispentaphylla situated at the
vicinity of the infected trees (Figs. 1 and 2). The
bark of roots were rotted and, in most cases, the
rotting was extended up to the collar region. The
fungus responsible for the disease was isolated
and identified as Fames lignosus (Klotzsch) Bres.
Heavily infected trees were removed from the
sites. Basal area covering one metre radius of each
diseased tree was drenched with 2% commercial
formalin. The second spray was given 15 days
after the first. The sprays, however, could notsave
the diseased trees butfurtherspread ofthe disease
symptom was checked

Abstract:

Dendrocalamus hamiltonii and Schizostachyum dullooa are the two
important threatened bamboo species of Bangladesh. They flowered gregariously during 1996 to 1998 and 1999 at the bambusetum of Bangladesh Forest
Research Institute,Chittagong and RangapaniTeaEstate, Hazarikhil, Chittagong
respectively. The flowering cyclesfor D. hamiltonii were estimated as 43 + 5 years
and for S. dullooa as 45 + 2, 35 + 2 and 15 + 2 years. Observations were made on
flowering nature, death and seed characters of these species. The germination
and seedling characters were also recorded. Planta tions of both the species were
raised with seedlings by the Forest Department and the NGOs. In future these
will be used as ex situ conservation plots.

Abstract:

This paper reports the distribution, nature and impact of damage, life
history, number of generations in a year, host records and biocontrol agents of
the beehole borer, Zenzera conferta Walker (Cossidae : Lepidoptera) infesting
keora (Sonneratia apetala Buch.-Ham.) plantations along the coastal belt of
Bangladesh. The pest profusely tunnels in the stem rendering the tree to wind
breakage. It probably completes two generations in a year. Besides keora, the
pest attacks Sonneratia caseolaris, Avicennia officinalis, A. alba and Tamanx indica.
Woodpeckers (Dinopium benghalense and Picoides canicapilltis) and a small black
ant were found to feed on the larvae and pupae of the pest.

Abstract:

The community structure and growing stock variations were studied in moist
temperate Quercusfloribunda forest on four different aspects and altitudesin Garhwal
Himalaya during the year 1996. The total density and basal cover values in the tree
layer varied from 250 to 340 trees/ha and 18.44 to 38.24 m2/ha respectively. The
maximum number ofsaplings (400 saps/ha) of Quercusfloribunda were observed on
the hill base of SE aspect, whereas, the lowest number ofsaplings (80 saps,/ha) on the
hill top of NW aspect. The maximum (1.8131) and minimum (1.4717) diversity values
were reported for NE and SE aspects respectively. The highest total growing stock
(349.0m3/ha) was observed on SW aspect. On NE aspect a strong positive correlation
(r=+0.88) was observed between the growing stock values and diameter classes.
Physicochemical properties of soils were found to be promising for the growth of
Quercusfloribunda forest on northern aspects as compared to southern aspects.

Abstract:

Homestead forestry, albeit its paramount importance and contribution to rural
socio-economy, remains a rather ignored area of study. This research focuses on the
floristic composition and socio-economic aspects of homestead forestry in two areas
(Habilashdip and Chunati Unions) in the district of Chittagong. Home gardens are
located close to houses and characterised by a mixture of annual and perennialspecies.
The proximity to natural forests and the availability of timbers in local markets also
seem to influence the propensity to plant timber and fuelwood in home gardens. Fruit
trees dominate the gardens, followed by fuelwood species. Women play an intensive
role in the management of home gardens. The article ends Vith an exhortation for
increased research on homestead forestry

Abstract:

The paper compares the economic performance of Eucalyptus camaldulensis
plantations of different ages. The price ofsawn timber per cubic metre was found
to be Tk. 4,076 to 8,828 (1 USS = 48.71 Tk.). The fuelwood was usually sold at a price
ranging from Tk. 915 to 1,677 per ton. The staking, felling and logging costs were
Tk. 864, 686 and 1,431 per hectare respectively. The IRRs were 22.87, 20.66,20.57,
39.13, 27.58, 12.67 and 59.81% for Dinajpur (rural Charkai), Dinajpur (urban
Charkai),Sylhet(Chawtali), Sylhet(Lawachara),Tangail(Charaljani), Mymemsingh
(Santoshpur) and Cox’s Bazar (Chainda) respectively at 10 years rotations. For
Dinajpur and Tangail, the NPVs were found to be negative for the 5th, 6th and
7th rotation ages

Abstract:

A survery was conducted to assess the present status of infestation caused by
the beehole borer, Zeuzera conferta Walker(Cossidae: Lepidoptera) in keora (Sonneratia
apetala Buch.-Ham.) plantations along the coastal belt of Bangladesh. The survey
covered plantations raised in the four Coastal Afforestation Divisions, namely
Patuakhali, Bhola, Noakhali and Chittagong of the Forest Directorate. The survey
revealed an overall infestation of 20.9% with an average of 15.6,16.6, 26.3 and 25.2%
in the four Divisions respectively. A number of plantation attributes, such as age
(3-20 years), inundation duration (very low to very high levels with which the keora
stand got tidally inundated in a year), canopy closure (open and closed), and stand
composition (single species and mixed species), were evaluated for their correlation/
association with the degree of infestation. The correlations between the degree of
infestation and plantation age in Patuakhali (r = -0.28 ) and Bhola (r = -0.31) were
non-significant, whereas those in Noakhali (r = -0.71) and Chittagong (r = -0.53) were
significant. The infestation trend reached its peak at around the age ofseven years and
then decreased slowly. Infestation was higher in highly inundated (> 9 months
inundation), open canopy and single species stands.

Abstract:

It is generally believed that the seedling of palmyra palm (Borassus
flabellifer Linn.) is difficult to transplant and hence requires directsowing. This
hinders mass propagation and plantation of this species. Its propagation is
mostly through natural means, and hence palm trees are found to grow
scatteredly. At present, palmyra palmhasbeen recognized as a priority species
for raising plantations in the coastal embankment. This study has been undertaken to develop technique for raising palm seedlings. Investigations suggest
that the bed mixture comprising 50% soil, 25% sawdust, 20% cowdung and 5%
ash was the best, where tire average elongation of germtubes and coleorhiza/
root-sheath was 37.3 cm by 7 weeks, the mixture depth of 38.1 cm wassufficient
to accommodate theircumulative growth. These elongated germtubes could be
removed from the temporary bed after 7 weeks of sowing seeds, when the tip
of emergent coleoptile is visible on the surface of the bed. Rootlets were also
found to occur in the root-sheath of all tire germtubes by that time. These
germtubes were then detached from theirseeds and transplanted immediately
into suitable polybags of22.9 cm x 30.5 cmsize. All the transplantated seedlings
survived and the emerging leaflets of these seedlings turned to green within a
week after transplantion. The mortality of early and late trasplanted seedlings
was 11% and 25% respectively. Germtubes were found to elongate up to 82.6%
within 4 weeks after sowing seeds. On the other hand, more than 50% elongation of the coleoptile was observed during the 5-7th weeks after sowing

Last Published
About BJFSBD.ORG

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.