A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute

ISSN - Print: 1021-3279 | Online: -

The responses offour provenances ofAcacia nilotica to salinity (0,75,150, and 225
mMNaCl) at the germination stagewere examined experimentally and compared with their
known salt tolerance at the seedling stage. There were significant differences in final
germination percentage and germination rate between salinity treatments and between
provenances. The provenance (Tunzini, Swaziland) which appeared more salt tolerant
during germinationwas notmost tolerant at the seedling stage.


Provenances of mangium (Acacia mangium Willd.) from Queensland (Australia),
Papua New Guinea and Indonesia were planted under three site conditions
of Ilocos Norte, Masbate and Bukidnon regions in the Philippines which are
edaphically, climatically and topographically different from each other.
Highly significant (P<0.01) variations in diameter, height and merchantable height growth performances of 18 provenances at Ilocos Norte, 12 provenances at Masbate and 12 provenances at Bukidnon at5.5 years after planting were observed. The best growth was observed in Bukidnon site, and the provenance 13240 (Ellerbeck Rd. Qld.) of the species exhibited the best growth performance at that site which could be selected for pilot plantation trials in the Philippines.


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.

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