Properties of two sago species
1991
Prayitno, T.A., Gadjah Mada Univ., Bulaksumur Yogyakarta (Indonesia). Faculty of Forestry. Dept. of Education and Culture
The sago species, namely, sago tuni (Metroxylon rumphii Mart.) and sago molat (Metroxylon aagos Rottb.) were examine. Wood structure and anatomy, physical and mechanical characteristics were studied. ISO and British procedures were employed in the preparation and testing of the sago wood samples taken from the hard outer part of the sago stem. Sago wood consists of three major wood elements, namely, parenchymatous ground tissue, fibrovascular system and schlerenchyma cells capping the vascular bundles. Percentage of ground tissue decreased from inner to the outer part, but increases from the butt to the top portion for both sago species, similar axial and radial variations were observed in the percentage and density of vascular bundles and schlerenchyma cells. On the other hand, sago wood fiber dimensions decrease radially and longitudinally. Initial and maximum moisture content of the sago wood increases from butt to top. Variation of specific gravity and shrinkage, however, does not show specific trend in both direction, especially the hardest part of the sago wood. Static bending, compression parallel to grain and shear variation, shoe a decreasing trend from the basal to the top portion. This result is parallel to the variation of wood specific gravity.
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