Brazilian cerrado species: wood characteristics

Abstract

The characterization of wood anatomy and proprieties can provide subsidies for rational use of tree species. Enables, oftentimes, the definition of technological potential of wood - and wood products - through the assessment of quality information and also allows it´s correct identification, contributing to the timber production chain. The objective of this study was to contribute to the knowledge about wood properties of the Cerrado biome (Brazilian savanna) species trough the anatomical characterization and determination of density profile. Twenty trees species belonging to thirteen families occurring in Pirenópolis, Goiás and Brasília, Federal District, Brazil, was selected and radial samples were removed from the tree trunks at the DBH (1.30 m) in a non-destructive way using an incremental probe and a motorized extractor. The qualitative and quantitative anatomical parameters of vessels and fibers and the wood density were determined in the collected samples. Species presented fibers with mean values between 900.5 and 2052.9 µm for the length; 18.1 and 27.7 µm for the diameter; and 4.4 to 9.4 µm for the wall thickness. The species presented a variation in the vessel dimensions from 29.2 to 155.6 µm for the diameter; 17.7 to 32.5% for occupied area; and 2.6 to 165 to vessels.mm-2. The apparent density presented mean values between 0.36 and 1.21 g cm-3. The specie that presented the highest variation of wood density was A. fraxinifolium. According to the radial profiles two patterns of increasing and stable variation in the apparent density of the pith to bark were defined as a function of the wood anatomical characteristics.

Fiber quality and wood basic density of species of the Savannah for productive purposes

“…The mean value for fiber length and fiber wall thickness of E. pentaphylla presented by was 2,005 μm and 7.55 μm, respectively, similar to those of the present study. Thus, the results obtained in this research for fiber dimensions of forest species were consistent with those presented in the literature for Savannah species, with a variation from 688 to 2,052.9 μm for length; 12 to 27.7 μm for diameter; 1.6 to 16.3 μm for lumen diameter; and 4.3 to 11.5 μm for fiber wall thickness (Paula, 2005;Paes et al, 2013;Faria et al, 2020).…”

WOOD ANATOMICAL STRUCTURE AND DENSITY OF Tachigali aubl SPECIES OCCURRING IN THE SOUTHEASTERN PERUVIAN AMAZON FOREST

“…Regarding the parenchymal tissue, it is found in various studies of the Tachigali species that one of the most frequent types of parenchyma in these species is the vasicentric paratracheal type (BRITO JUNIOR et al, 2021;MACEDO et al, 2014;REIS et al, 2011), where the three species studied present this type of parenchyma, being abundant and prominent in the cross-section. Of course, there are some other types of parenchyma that the species of the genus Tachigali present, such as: unilateral (T. froesii, T. melanocarpa), aliform and confluent in short and long sections (T. aurea), and even absent or extremely rare (T subvelutina) (DE FARIA et al, 2020;REIS et al, 2011). Regarding the rays, there is also an outstanding characteristic in the species of this genus, most of the studies show that the Tachigali species present predominantly uniseriate rays (BRITO JUNIOR et al, 2021;DE FARIA et al, 2020;MACEDO et al, 2014;REIS et al, 2011), as in the case of the three studied species that are uniseriate; however some species can be uniseriate and biseriate such as T. denudata, T. paratyensis (MACEDO et al, 2014).…”

“…Of course, there are some other types of parenchyma that the species of the genus Tachigali present, such as: unilateral (T. froesii, T. melanocarpa), aliform and confluent in short and long sections (T. aurea), and even absent or extremely rare (T subvelutina) (DE FARIA et al, 2020;REIS et al, 2011). Regarding the rays, there is also an outstanding characteristic in the species of this genus, most of the studies show that the Tachigali species present predominantly uniseriate rays (BRITO JUNIOR et al, 2021;DE FARIA et al, 2020;MACEDO et al, 2014;REIS et al, 2011), as in the case of the three studied species that are uniseriate; however some species can be uniseriate and biseriate such as T. denudata, T. paratyensis (MACEDO et al, 2014).…”