Propriedades Químicas e Energéticas de Madeiras Amazônicas do Segundo Ciclo de Corte

The aim of this study was to determine the chemical and energetic properties of Bixa arborea, Protium apiculatum, and Rinorea guianensis woods in order to support the recovery of residues in the lumber production of these species, also considering the lack of studies on their technological properties. For this purpose, five trees of each species were collected and, subsequently, discs were removed from the height of 2 meters above surface; they were processed in wedges to obtain sawdust for analysis. The evaluation of the results was performed by the Tukey’s mean comparison test at 0.05% probability level. B. arborea was the species with the highest gross calorific value and lignin content, but lower specific gravity. P. apiculatum and R. guianesis showed chemical and energetic characteristics favorable to charcoal production and firewood.