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
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.
The growth and biomass production of 17 provenances of Acacia mangium were
studied at the age of 5.5 years at Keochia Silvicultural Research Station, Chittagong.
The provenances showed significant differences in survival, height and diameter
(dbh) growth. In terms of height and dbh, Boite PNG provenance has shown the best
performance among the 17 provenances. But the provenance Iron Range QLD,
produced maximum (15.7 t/ha/yr) above-ground oven-dry biomass followed by
NW of Ingham QLD (11.8 t/ha/yr).
Teak (Tectona grandis Linn, f) is one of the most
well-known versatile timbers in the world. Its
large scale cultivation is much hampered by various
factors. Among them poor germination of
drupes (fruit with seed) is a major constraint. The
causes of poor germination are many such as
emptiness, prolonged and protracted germination,
season and method of seed collection, age of
mother tree and innate problems prevailing in the
seed itself (Dharmalingam 1995). Several informations
exist on method and season of seed collection
of many tree species. But such informations
are scanty in teak. Against this backdrop, a study
was made to find out the influence of collection
methods on germination and seedling attributes
of teak.
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.
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