Silva, Jeferson Pereira Martins Fernandes, Márcia Rodrigues de Moura  Gonçalves, Anny Francielly Ataide  Lopes, Isáira Leite e  Silva, Gilson Fernandes da  Cabacinha, Christian Dias  <br/><br/>
Estimation of the Basic Wood Density of Native Species Using Mixed Linear Models 

<br/><br/> Publicação on-line; 49 ref.; 7 tables; 2 illus.; Summary (En) 
<br/><br/> <br/><br/>ABSTRACT<br/><br/>This paper aimed to estimate the basic density (DB) of the wood of Cerrado species using mixed<br/>linear models. For performing the DBH measurement, the sampling of 334 individuals was<br/>carried out. By keeping the Pilodyn apparatus in the DBH position, two measurements were<br/>made on opposite sides. Further, for determining DB, the trees were knocked down, followed<br/>by removal of five wood discs at different height of stem positions. For this purpose, two sets<br/>of modeling alternatives were proposed, which take into account with and without random<br/>effects, employing species as a random effect grouping variable. Thus, it was elucidated that,<br/>for the estimation of DB, the mixed model that considered the random effects performed better<br/>as compared to the alternative model without random effects. The inclusion of random effects<br/>leads to the estimation of DB with high accuracy.<br/><br/>Keywords: Cerrado stricto sensu, wood quality, regression. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CERRADO<br/>MADEIRA<br/>QUALIDADE<br/>REGRESSÃO LINEAR