Abstract

LIMA, Israel Luiz de; PIMENTEL, Marcos Manzano  and  GARCIA, José Nivaldo. Mechanical Properties and Specific Gravity of the Wood of Tectona grandis Linn. F. (teack) According to the Spacing and the Radial Position in the Log. Silva Lus. [online]. 2011, vol.19, n.2, pp.221-232. ISSN 0870-6352.

The ideal spacing between trees in order to obtain higher proportion and better quality of wood is one of the issues to be considered in research on forest management of Tectona grandis (teak), which is characterized by the productivity and quality of its wood. This study aimed to investigate the influence of spacing on some mechanical properties and wood density of Tectona grandis, with 32 years old, and the radial variability of these properties. The experimental design used was randomized blocks with five replications in factorial scheme 3x3 (spacing x the radial position in the log) being three spacings (3 x 1.5; 3 x 2.0 and 3 x 2.5m) and three radial positions (pith, intermediate and bark). The sample was composed of 15 trees with the greater diameter in populations in the region of Pederneiras, SP, Brazil. According to the results, it could be concluded that the spacing of the trees did not significantly influence the mechanical properties and density. Larger spacing can produce a greater volume of wood per unit area, without affecting the mechanical properties and specific gravity. An increase towards the pith-bark direction also occurred in all the studied properties.

Keywords : Forest management; wood properties; strength.

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