Physical and chemical properties of wood from <i>Eucalyptus</i> and <i>Corymbia</i> clones in different planting densities

The present work aimed to evaluate some technological characteristics of the wood two commercial hybrid clones Eucalyptus spp and Corymbia spp, implanted in three different planting spacings, at 24 months age. Four trees per clone were sampled each spacing determine following characteristics: basic density, gross calorific value, energy density cellulose, hemicellulose, lignin, ash carbon contents. There was a significant effect x interaction for lignin cellulose contents wood. showed highest levels values wood, with emphasis on C3, where averages study verified. For hemicelluloses observed. As content value there no effect, either from clone, or these factors. results show that is variability between genetic materials evaluated relation tested. It should be noted choice best material based but also forest productivity associated good silviculture species evaluated.