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 and
vigour 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 days
after 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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