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Cultivation of native forest species increases the stock of wood on the market and reduce pressure on natural forests. Paricá (Schizolobium parahyba var. amazonicum Huber ex Ducke) has compatibilty for monoculture crop and its wood arouses commercial interest, but as a characteristic of wood from forest planting and little studied. This work aimed study influence of diametric classes on variability of properties of young paricá wood in commercial planting. 20 trees were harvested, distributed in five diametric classes to determine the basic density (db); porosity (Φ); contractions: longitudinal (εl), radial (εr), tangential (εt) and volumetric (Δv); and anisotropy coefficient (T/R). The density of the wood in particular ranges from 0.22 to 0.37 g/cm3 and shows an increasing increase as the diameter increases. Wood was classified as light and highly porosity (77 to 85%). The values of εl (0.22 to 0.39%), εr (1.74 to 2.72%), εt (3.14 to 4.14%) and Δv (4.98 to 6.64%) varies between diametric classes and indicates a tendency to reduce dimensional stability in trees with larger diameter. Despite this, a studied wood is not very retractable and the T/R values (1.59 to 2.61%) were lower in trees with a larger diameter. Artigo Original Original Article Artículo Original Artigo recebido em 25/07/2019 aprovado em 13/07/2020 publicado em 31/10/2020.

INFLUÊNCIA DA CLASSE DIAMÉTRICA NAS PROPRIEDADES FÍSICAS DA MADEIRA DE PARICÁ (Schizolobium parahyba var. amazonicum)