Propriedades físicas de Eucalyptus grandis x Eucalyptus urophylla para utilização como madeira serrada

Abstract

Basic density and retractability are physical properties of wood of great importance, as they can indicate the potential of wood for sawmills. This work aimed to determine the basic density and shrinkage of wood from a clone of Eucalyptus grandis x Eucalyptus urophylla, changing the production of sawn wood for the mobile industry. Three seven-year-old trees, planted by Copener Florestal in the northeast region of Bahia, were used in this work. After cutting the trees, 2 discs were removed from each position per tree, being: 0, 25, 50, 75 and 100% of the commercial height. These samples were used to determine wood basic density, cascade basic density and shrinkage determinations. The percentage of bark found for the studied genetic material was 15.38%. The average basic density of the wood was 0.479 and that of the cascade was 0.307. The tangential contraction determined for this genetic material was 10.3%, the radial contraction was 8.3% and the anisotropy coefficient was 1.2. The genetic material studied presented basic wood density, tangential and radial contractions and anisotropy coefficients that qualify them for use as sawn wood.