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The exploitation of valuable native timber species in forest restoration projects has emerged as a promising strategy to make restoration financially viable. There are few studies regarding the quality of timber from restoration plantations. The aim of this study was to analyze growth stresses by determining the longitudinal residual strain (LRS) and evaluate their correlation with the growth variables in the species Peltophorum dubium (Spreng.) Taub in a 14-year old restoration plantation. Eighteen individuals were evaluated, determining the following variables: diameter at breast height (DBH), bark thickness, average annual growth in diameter (IMA) and annual periodic growth in diameter (IPA 2012-2015 ). The LRS was determined by the extensometer (CIRAD-Forêt), on DBH height and in the north-south direction of each tree. The LRS average was 0.072 mm, within the range of expected wood values for sawmilling. There was a significant positive correlation between the LRS, DBH and IMA.

The objective of this research was characterize the physical properties, evaluate the machinability and obtain parameters of the roughness of the four eucalyptus species wood. For the machinability it was made specimens with dimensions of 50 x 12.5 x 2.3 cm. With the specimens were made the tests of planning, sanding, boring and tear and nails insertion. For the studied species and samples were determinate the physical properties of basic and apparent density, volumetric contraction and the anisotropic factor. The analysis of the roughness was only made in the planned surfaces, through the needle method. The average of density obtained was similar with found in species commonly used in the production of furniture. The species presented good quality, being satisfactory for the industry of furniture segment.

Varios sao os processos industriais que utilizam a aplicacao de calor na madeira, pois a mesma termicamente tratada pode ser muito bem empregada em situacoes que relacionam os tratamentos termicos a finos acabamentos. Este estudo teve por objetivo analisar a madeira de Eucalyptus grandis submetida ao tratamento termico de acordo com suas propriedades fisicas e de acabamento superficial. Para isso, amostras de madeiras foram submetidas aos tratamentos termicos sob diferentes condicoes de temperatura e tempo de permanencia (160 °C-2 h; 180 °C-2 e 4 h; 200 °C-2 h; 215 °C-4 h; e um tratamento controle). Foram determinadas a umidade de equilibrio, a densidade aparente, a densidade basica, a variacao volumetrica e realizados testes de rugosidade e teste de aderencia ao acabamento superficial utilizando-se dois tipos de vernizes (poliuretano e nitrocelulosico). Os tratamentos termicos influenciaram as propriedades fisicas da madeira, proporcionando, para as madeiras tratadas, menores valores de umidade de equilibrio, densidade aparente e variacao volumetrica. Medias inferiores de rugosidade das amostras aplainadas no sentido concordante da gra foram observadas para os tratamentos controle e 215 °C-4 h. Os tratamentos termicos 160 °C-2 h e 215 °C-4 h apresentaram resultados inferiores de aprovacao no ensaio de aderencia ao acabamento superficial para os dois vernizes avaliados.

This study was to compare the behavior of five native Brazilian species: angelim (Andira anthelmia), a canela (Anila firmula), cedro (Cedrela fissilis), ipe amarelo (Tabebuia alba) e a muiracatiara (Astronium lecointein) through testing machining. It was made ten samples for each kind of dimensions following the U.S. ASTM D 1666-87. Still determined the apparent density of the wood (g.cm-3) based on the NBR 7190 in order to establish possible relations For machining tests, all species behave well with relation to the sanding and drilling for peg no significant differences between the grades obtained. However, the ipe submitted the worst result for the planing test and cedro due to its smaller apparent density obtained the worst result front of drilling tests. With respect to turning test, species of ipe and canela were rated as the best among the tested species. Overall, it was concluded that the species showed potentials of uses in furniture, frames and general finishing occasions.