Propriedades da madeira de duas espécies nativas Tachigali vulgaris e Dalbergia nigra de plantios homogêneos para produção de pisos

Abstract

Due to the great pressure of the natural native forest, especially on some species, there are few studies on the native species and a great demand of products of forest origin, mainly produced from the wood. The general objective of this work was to evaluate the potential of the wood of two native species of homogeneous forest plantations, Tachigali vulgaris and Dalbergia nigra separated by heartwood and sapwood regions, as raw material for the timber industry. Three individuals of each species were selected, being the age of the plantations of 30 years. The characterization of the wood technological properties was carried out, considering the macroscopic anatomical properties analyzes, the characterization of the physical properties as density and volumetric retraction and the floor simulation tests, including, friction test, rolling load, impact of falling steel sphere and abrasion resistance. The analysis of density in the jacaranda tree showed no significant difference in relation to the regions, but among species, its sapwood differed from the Tachi sapwood. The Tachi core had the highest density, with the lowest density found among the woody regions of the studied species, with a mean of 0.58 g.cm -3, differing significantly from each other, and the Jacarandá species. In the in-service simulation trials, a comparison of the quantitative variables for the two types of wood (heartwood and sapwood) was performed using the Multivariate Analysis of Variance (MANOVA) technique. it was observed that the Tachi species in the heartwood region has the highest resistance among the species and regions of the wood studied