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BANGLADESH JOURNAL OF FOREST SCIENCE

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

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

This paper presents information about growth, harvesting ages and yields for
jalibet (Calamus tenuis’), kerakbet (C. viniinalis) and gollabet (Dacmonorops jenkinsiana)
raised in semi-evergreen/deciduous forests of Bangladesh. Clump expansion with
increasing age was highest for C. tenuis and C. viniinalis in Chittagong, and for D.
jenkinsiana inSylhet. Mean annual height increments ofmain shoot of a clump ofC. tenuis,
C. viniinalis and D. jenkinsiana were 0.94 + 0.08,1.11+0.09 and 1.45±0.11 m respectively.
Highest number of shoots per clump was noticed for C. tenuis in Sylhet followed by
C. viniinalis and D. jenkinsiana in Chittagong. Mean diameters of the main shoot of these
species were 1.6 ± 0.1, 2.14 + 0.1 and 3.01 ± 0.13 cm respectively. Wildings were found
under the clumps with varying numbers. The exploitable ages for C. tenuis, C. viniinalis
and D. jenkinsiana appeared to be 6-8, 9-11 and 10-12 years respectively. Further
information and studies are needed to determine the harvesting cycle and suggest a
management plan for rattans.

Abstract:

Several studies were previously conducted on pulping of jute plant by
alkaline processes. But the response of the plant to alkaline pulping is poor. In the
present study neutral sulphite anthraquinone (NS – AQ) process proved more
advantageous over alkaline processes. The process is capable of producing a
significantly higheryield compared to the alkaline processes. The physicalstrength
properties of NS – AQ jute plant pulp stand in between hardwood and softwood
kraft pulps. However, success of commercial utilization of jute plant in pulp
making largely depends on efficientmeans of collection, transportation and storage
of the plant. Hence, due attention to these problems must be given

Abstract:

Ipil-ipil {Leucaena leucocephala (Lam.) de Wit} is considered as an
outstanding tree because of its worldwide success as a highly nutritious forage
tree. Thisstudy is an attempt to determine suitable spacing formaximumbiomass
production. Widerspacing (60 cm x 60 cm) provided maximum seedling growth
(height 177.9 cm and collar dia. 15.3 mm) and biomass production (green weight
276.0 g/seedlingand dry weight 166.5 g/seedling) at the age ofnine months of the
seedlings. However, closerspacing (15 cm x 15 cm) produced significantly higher
biomass(greenweight 28.21 ton/ha and dry weight 11.68 ton/ha) on an area basis.
Small land holding farmers may rear their livestock by planting this legume and
harvesting under a ‘cut-and-carry’ system which will supply high quality forage
that uses to supplement low quality roughage such as crop residues.

Abstract:

The colonization status of arbuscular mycorrhizal (AM) fungi of Melia azedarach L.
seedlings grown from seven different types of pre-sowing treated seeds and the spore
population in the rhizosphere soils were studied. The percent root colonization varied
significantly and ranged between 14.81-95.0 in different treatments. The superior
seedlings showed heavy root colonization as compared to otherseedlings. The intensity of
colonization and spore population also varied significantly in different treatments. Spore
population was not correlated with the percent root colonization and seedling growth
parameters. Four AM genera such Glomus, Acaidospora, Entrophospora and Gigaspora were
identified from the rhizosphere soils of the seedlings. The importance ofAM fungi has been
ensured from this study for the primary establishment of M. azedarach seedlings in the
nursery

Abstract:

Physical and chemical properties of some soils from Madhupur rubber
plantation area in Bangladesh have been studied. Results of particle-size distribution,
oven dry/air dry ratio, field moisture capacity, pH, organic carbon, total nitrogen,
cation exchange capacity (CEC) and exchangeable cations of the soils on depth basis
have been presented. The nutrient contents of these soils have also been reported. With
respect to nutrient status and physico-chemical properties, these soils are considered
to have good potentiality and prospect for increased production of rubber, if proper
attention and management practices are adopted.

Abstract:

The paper presents the anatomical features of bamboo leaves in transverse
section for 26 bamboo species underseven genera occurring in Bangladesh both in wild
and in cultivation. The results are presented in a tabular form. The findings indicate that
anatomical features ofbamboo leavesin transverse section work as taxonomic characters
at species level. The paper also provides a dichotomous key to identify bamboo species
occurring in Bangladesh based on leaf anatomical characteristics.

Abstract:

This paper deals with detailed macroscopic and microscopic characteristics of
five timber species, namely Calophylluni polyanthum Wall., Garcinia cowa Roxb.,
G. xanthochynius Hook., Kayea floribimda Wall, and Mesuaferrea Linn, of Guttiferae from
Bangladesh. Dichotomous keys based on both the macroscopic and microscopic
features have been developed for their identification.

Abstract:

Casuarina equisetifolia seedlingsinoculated with different biofertilizerssuch as
Azospirillum, Phosphobacterium, VAM fungi and Frankia and their combinations were
planted in farmland. Growth parameters were collected at bimonthly intervals up to
30 months. Biomass was estimated 24 months after planting. Maximum height, girth
at breast height (gbh) and total biomass were obtained in the combined application of
Azospirillum, Phosphobacterium, VAM and Frankia. The combination of VAM +
Frankia among double inoculation, and the combination of Azospirillutn, VAM and
Frankia in triple inoculation also proved to be the best treatment in promoting the
significant total height, gbh and total biomass production

Abstract:

Kadam (Anthocephalus chinensis (Lam.) Rich ex. Walp.}, a fast growing
multipurpose tree species, is grown in the homesteads and planted in the forest areas of
Bangladesh. The plantations of this species often suffer from the attack of the defoliator,
Arthroschista (=Margaronia) hilaralis Walker (Pyralidae : Lepidoptera). This paper
describes distribution, host plants, nature and impact of damage, life history, number of
generation, population fluctuation, natural enemies and management of the pest. The
pest completes its life cycle within 23.0 + 3.0 days. It has 9-10 generations in a year.
Younger trees, usually 2-5 years of age, were found most heavily infested. The peak
infestation occurred during August-September. Two parasites, Apanteles balteatea Lal.
(Braconidae : Hymenoptera) and Brachytneria lasus Walk. (Chalcididae: Hymenoptera),
caused a mortality of about 40% of the pest population. Application of Thuricide
(Bacillus thnringiensis) 40 WP or Malathion (malathion) 57 EC @ 0.1% concentration was
effective in controlling severe infestation. Hand collection and destruction at the initial
stage of infestation could suppress and provision of overhead orside shade for the tree
could prevent the attack of this pest

Abstract:

The bagworm, Cryptothelea crameri Westwood (Psychidae : Lepidoptera) is an
important pest of many ornamental, horticultural and forest plants in Bangladesh. The
larva feeds on young leaves and tender bark by making and living within a portable bag
of leaves, twigs, barks, spines, etc. The biology, host range, number of generations, and
seasonal abundance of the pest have been dealt with in this paper. Brachymeria sp.
(Braconidae: Hymenoptera) wasfound to parasitize its larva. The pestcould be collected
and destroyed by hand. It could also be controlled by the foliar application ofmalathion
(Malathion 57 EC) at 0.1% concentration.

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