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A STUDY ON PHYSICAL PROPERTIES OF TWO BAMBSOO SPECIES BORAK ( Bambusa Balcooa ROXB.) AND JAWA ( Bambusa Salarkhanii ALAM) OF BANGLADESH

Bamboo, a renewable natural resource in villages and forests of Bangladesh, is widely used in almost all purposes by the poor people. Shrinkage, green density, ovendry density and moisture content of two bamboo species of Bangladesh - Borak (Bambusa balcooa Roxb) and Jawa (Bambusa salarkhanii Alam) were studied at different heights (top. middle and butt). Shrinkage of both wallthickness and diameter were carried out and was found noticeable at ovendry condition. Although percentage of shrinkage decreased with the increase of height, and there was no significant difference between them. Mature bamboo had lower wall thickness shrinkage compared to that of immature bamboos. Again jawa had smaller shrinkage values in both wall-thickness and diameter compared to those of borak. Density variation was found among all the parameters but none of them was significant. Moisture content was found to vary between and within species. The difference was found to be statistically significant in case of species and maturity.