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
Physical and mechanical properties, durability and treatability characteristics of
21 timber species have been collated. Enduses of these species have been evaluated.
Based on the various uses, the species have been recommended as priority species for
plantation.
The production of pulp can be substantially increased by addition of anthraquinone
as a catalyst in kraft and soda pulping. However, a greater benefit can be
achieved in soda pulping. In assessing jute fibre as an alternative raw material for
pulping, it shows a promising prospect. The use of neutral sulphite anthraquinone
process can make conifer-like pulp from jute fibre.
Seedlings of Bambusa tidda Roxb. and Dendrocalamus strict us Nees were grown in the
nursery under four different light conditions, viz. sunlight, partial sunlight, shade, and
6 hours photoperiod up to nine months of age. Almost all the seedlings were dead (80 to
90%) under shade and 6-hr grolux electric light photoperiod conditions after 200 -270
days. Survival was highest (80-95%) under both sunlight and partial sunlight condition.
The seedlings were comparatively healthy, green and tall under partial sunlight. Under
these two light conditions seedings started clump formation within three months of age.
The clump formation was delayed and a very few bamboo seedlings formed weak clumps
under shade and 6 hours photoperiod conditons.
The paper describes particleboard making characteristics of three common bamboo species, namely, Banibusa balcooa, Banibusa vulgaris and Melocaiina baccifera grown in Bangladesh. Urea formaldehyde resin was used as the binder. The particleboards from these bamboo species compare almost an equal strength properties with those from wood species.
Gamar defoliator, Calopepla leayana Latr. (Chrysomelidae : Coleoptera) is a major defoliator of gamar (Gnielina arborea Roxb.) in Bangladesh. Both the larva and the adult feed on the leaves making irregular holes on them. The distribution, description and biology of various developmental stages of the pest are provided. The pest has three generations in a year, hibernating as an adult from November to May. A common pupal parasite, Brachymeria sp. and an egg parasite, Tetrasticlnis sp. were recorded. Biological, chemical, physical and mechanical method for the control of the pest have been discussed.
The survey on visitors of Bhawal National Park reveals that picnicking was the highest participated outdoor recreation activity (79.62%), and sightseeing was the second highest activity (12.83%) with respect to all socio-economic variables viz. gender, age, education, and income. Male visitors (82.26%) are higher than the female visitors (17.74%). Age-groups of 26-35 and 16-25 years are more interested in participating outdoor recreation activities which are 40.38% and 35.09% respectively. Participation in outdoor recreation activities increases with the increase of
education level. Majority of the visitors are from middle class (47.19%) and high middle class (24.34%). Visitors from all gender, age, education level and class participate in outdoor recreation activities in Bhawal National Park. So, development of proper planning and scientific management of outdoor recreation facilities of the park are needed in order to ensure sustainable benefits to the visitors.
Twelve high density (density range 0.775-1.031 g/cm3 lesser used/unused hardwood species, viz. bhadi (Lannea coromandelica), bahera (Terniinalia belerica), haritaki (Tarminalia chebula), jam (Syzygium sp.) kanak (Schima wallichii), minjiri (Cassia simaea), batna (Quercus sp), goda (Vitex peduncularis), gutguttya (Protium surratum), homalium (Homalium bhamanse), itchri (Anogeissus acuminata) and nageshwar (Mesue ferrea) were studied to determine their pulp making characteristics. An active alkali change of 14% and sulfidity of 25% were used in all cooks. It has been observed that most of these species produce good quality pulp.
Seed germination remains to be an unsolved problem in teak. Studies made on radiography and seed technological aspects using drupes from India and Thailand disclosed certain important features. Radiography has been standardised for sharp image to read the anatomical potential of seed. Teak drupes from two provenance differed in size and weight within and between seedlots. Radiograms revealed the development of 4, 3,2 and 1 seed in the tetracarpellary ovary in the order of 1,5,19 and 48% with 27% empty drupes. When drupe size decreased the percentage of
single-seeded and empty drupes increased correspondingly. Teak drupes possess ontogenic and dormancy problems posing challenge to germination
This paper describes the community structure of two prominant forest types i.e., moist deciduous miscellaneous and riverian Khair-Sissu forests of Himalayan foot hills in relation to their analytic and synthetic characters. The importance value index (IVI) values recorded from moist deciduous miscellaneous forest were maximum for Mallotus philippinensis (113.28) and minimum for Cassia fistula (6.54). Similarly the IVI values in the riverian Khair-Sissu forest were maximum (218.02) for Dalbergia sissoo and minimum (16.46) for Sapium insigne. The species diversity (2.3796), beta diversity (2.9166) and equitability (14.6700) values were observed as maximum in moist deciduous miscellaneous forest, whereas the values for these parameters were minimum (0.8507, 1.3636 and 2.4915 respectively) in the riverian Khair-Sissu forest. However, the values for concentration of dominance was maximum (0.6827) in riverian Khair-Sissu forest and minimum (0.1071) in moist deciduous miscellaneous forest. The soils in both the forest types were observed as alluvial, coarse textured and almost neutral in reaction.
The genus Xylocarpus (Family: Meliaceace) is represented by five species, namely X.australisicus Raidley, X. granatum Koening, X. molucccnsis Lamk. Roem, X. gangeticus Parkison and X. parvifolius, and they are distributed in the tropical mangrove forests (Saenger ct al. 1993). The two speciesX. granatum and X. molucccnsis are found also in the Sundarbans, Khulna (Chaffey and Sandom 1985) and Chakaria Sundarbans of Chittagong (Brandis 1906, Troup 1921).
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.
