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
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.
A protocol for regeneration of plan tlets from hybrid acacia (Acacia auriculiformis x A. mangium) trees was achieved through tissue culture technique. Effects of MS and B5 culture media supplemented with various concentration of different phytohormones were tested for the induction and proliferation of shoots. The etiolated shoot was cultured and proliferation was found best on MS medium supplemented with BAP (1 mg/1). Proliferation and growth of shoots were further improved through subculture. These shoots produced well developed roots when
cultured on 1/2 MS containing 1.5 mg/1 IBA supplemented with activated charcoal. Ninety per cent regenerated plants survived in the field.
Bambusa vulgaris culms sampled from the riverside of Bentong, Pahang, Malaysia were found to be suitable in the manufacture of cement bonded boards. The relatively high sugar content of the culms, however, was found to give a retarding effect on cement setting. In this study, cement ratio (1:3) was found to give better board properties. Board with a bamboo – cement ratio of 1 : 2.75 with the addition of 2% chemical additives produces an acceptable board which meet the requirements of the Malaysia Standard MS 934.
The paper presents the seed germination and seedling growth of jali-bet (Calamus tenuis Roxb.) based on studies at Bangladesh Forest Research Institute, Chittagong. Germination percentages were 70 for whole fruit, 10 for seed with pulp, and 86.66 for clean seeds. Survival was 95.6% in the field when one year old seedlings raised in polybags were planted. In 18 months after planting the seedlings attained a height of 109.78 cm with 3.34 number of culms per plant. Clean seeds for nursery raising, and one year old seedlings for out planting were found suitable for successful plantations.
Village forests of Bangladesh cover an area of 0.27 million ha while state owned forests cover 2.25 million ha. Village forests, mostly privately owned are more productive than the government forests, and supply about 85 per cent of timber requirements of the country.
Both indigenous and exotic trees are the major components of the village forests in Bangladesh. They are represented by about 183 species belonging to 136 genera under 48 families. Floristic elements of this flora consist mostly of native, African and New World taxa. About 50 species are exotics and many of them have been naturalized. Exotics are still being introduced.
Most of the village trees in Bangladesh have multiple uses. About 40 are fruit trees, and others produce timbers, fuel woods, fodders, tannins, pharmaceutical products, etc.
Other than species diversity, genetic variations also occur in these village forests. Homestead tree production system in villages is a mode of species and genetic conservation for a good number of trees.
This paper reports the infestation of teak canker grub, Dihammus cervinus Hope (Cerambycidae : Coleoptera) in teak plantations of Bangladesh. It deals with the nature and extent of damage, distribution, life history, number of generation and host plants of the pest and its control measures. The pest affected on an average 14% of the saplings. The attack was found mainly during the age of 2 – 6 years with a peak in the third year. The pest was more prevalent in Chittagong Hill Tracts (North and South) than in Chittagong or Cox’s Bazar Forest Divisions. An infested sapling often contained one canker, but it might have up to four cankers. A canker usually contained one larva but it might have 2-3 larvae. Most of the cankers were found at or near the base of the saplings. About 10% of the infested saplings were found broken at the cankered site. As regards to control measures, application of carbofuran 5G @ 6 gms/sapling at thebase and subsequently watered gave nearly 70% mortality
of the larvae.
The growth and biomass production of twelve provenances of Eucalyptus brassiana were studied at the degenerated sal forest areas of Madhupur, Tangail. The trial assessed at the age of seven year showed poor survival (18 – 33%). The provenances also showed both height and diameter growth differences but the differences were not significant. Considering the above ground biomass estimation, Provenance No. 13411, Weipa, Queens land showed the highest productions both for mean trees (44.4 kg/tree) and per hectare basis (52.6 t/ha) followed by Provenance No. 13396 E. Morehead, PNG.
Growth response of Acacia mangium seedlings to cowdung and NPK fertilizers was studied in Bangladesh Forest Research Institute, Chittagong. Use of cowdung and chemical fertilizers either individually or combinedly caused significant increase in seedlings’ height and biomass production. Application of cowdung alone in soil and soil-cowdung mixture at 3:1 ratio showed best performance to enhance both height increment and biomass production. The height growth and biomass production of A. mangium seedling ranked second when soil – cowdung mixture at the rate of 5 : 1 ratio was applied in combination with NP each at 60 ppm level. Chemical fertilizer alone showed less effect on the growth of the seedlings.
Interaction of nine provenances of Acacia mangium Willd. were studied at three sites of the Philippines such as Lubuagan, Vintar in Ilocos Norte (Region – 1), Mapuyo, Mobo in Masbate (Region-5) and Lantapan Malaybalay in Bukidnon (Region-10). The sites were climatically, edaphically and topographically different from each other. The provenances studied were 13233 (Walsh’s Pyramid, Qld.), 13235 (Mourilyn Bay, Qld.), 13236 (Kurrimine, Qld.), 13238 (Tully Mission Beach, Qld.), 13240 (Ellerbeck Rd. Cardwell, Qld.), 13241 (Broken Pole Creek, Qld.), 13242 (Abergowrie SF, Qld.), 13460 (Oriomo River, Qld.), 13621 (Piru Ceram, Indonesia).
Analysis of variance for diameter and height showed significant variations due to provenance, site, and provenance-site interactions. All the provenances except one (13621) showed the best growth at Bukidnon site due to main effect. The significant provenance-site interaction was found at Masbate site which was mostly due to the remarkably different growth behaviour of the provenance 13621.
The paper describes the gross and minute anatomical properties of Helicia excelsa Blume (Proteaceae) and Vernonia arborea Buch. – Ham. (Compositae). It also provides their probable uses based on anatomical properties.
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