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
Albizia falcataria wood has been studied for the suitability of manufacturing cement bonded particleboard. This species failed to produce board in workable conditions with the untreated chips. A substantial improvement of properties was observed when the boards were made with the chips treated in cold water. The boards were tested for determining the strength and dimensional stability. The product was found to be dimensionally stable after soaking in water. Even though bending strength was found to be low, the tensile strength passed the standard specification. Cement bonded particleboard made with this species can be used where dimensional stability is necessary.
Studies were made to assess the physiological maturity for harvesting the seed of Prosopis juliflora with high germination and vigour. Sufficient number of flowers were tagged at the time of anthesis. The developing pods were collected at weekly intervals, and pod and seed development were studied at each collection. Pod and seed weight increased with the increase of age and reached the maximum at 91 days after anthesis (DAA). In this stage pod colour turned from green to straw yellow. The seed extracted at this stage resulted in maximum seed weight,germination and vigour potential. Since the germination potential andvigour of this species started declining after this stage (91 DAA), the physiological
maturity stage for honey mesquite (P. juliflora) could be fixed at about 91 daysafter anthesis.
The feasibility of preservative treatment of golla cane [Daemonorops jenkinsiana (Griff.) Mart.], by soaking method was tested in the present study. Cane samples of 1 m, 2 m, and 3 m long were soaked with 10% borax and boric acid solution. The study revealed that adequate dry salt retention (DSR) in the above samples could be obtained in 3 days, 4 days, and 5 days respectively. The DSR values obtained were much higher than those of the specification (4 kgm-3) of Indian Standard. Dry cane (12.87% me) samples up to 3 m to 4 m long could be treated easily within 5 days, but the same dimension of green cane (150% me) samples needed 8 days. DSR value of air-dried sample was about 6 times higher than that of the green samples.
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