| Résumé: | At the municipality of Iranduba, in the state of Amazonas, there is a high consumption of wood by the local communities, for both charcoal production and to burn for producing bricks. As a result, EMBRAPA has developed a project to grow trees at Iranduba’s communities. So, the goal of this study was to evaluate the species Acacia auriculiformis (exotic) and Ormosia paraensis (native) by dendrometric variables, basic density, heating power and immediate analysis, through an experiment at Estação Experimental da EMBRAPA, in Iranduba. The experimental design was by random blocks with three repetitions, in a total of six parcels with 25 plants each. Five trees were taken out of the nine middle trees of the useful area. Discs 5 cm thick were taken from those trees and turned into proof bodies in order to determine the basic density and other tests. Analysis of variance and Tuckey tests, at 5% probability, were performed. A. auriculiformis (23,61 cm -15,90 m) was larger than O. paraensis (7,26 cm-7,06m) in diameter and height, respectively. Both species presented medium density, but A. auriculiformis (0,63 g/cm3) had greater values than O. paraensis (0,55 g/cm3). The heating potential of A. auriculiformis (4383,65 kcal/kg) was statistically higher than that of O. paraensis (4381,24 kcal/kg). For the immediate analysis A. auriculiformis showed greater values than O. paraensis, but presented lower values for fixed carbon. The results of this study showed that both species can be grown and used as proposed.
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