Longitudinal variation of basic density of Cordia americana and Alchornea triplinervia wood/Variacao longitudinal da massa especifica basica da madeira de Cordia americana e Alchornea triplinervia

The specific gravity ([ME.sub.b]) is one of the main parameters of wood properties. Considering that, this study aimed to evaluate the longitudinal variation of the basic density of the wood of Cordia americana (Linnaeus) Gottshling & J.E. Mill and Alchornea triplinervia (Sprengel) Muller Argovi...

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Bibliographic Details
Published in:Ciência rural 2014-05, Vol.44 (5), p.817
Main Authors: Trautenmuller, Jonathan William, Balbinot, Rafaelo, Borella, Juliane, Trevisan, Romulo, Balestrin, Diego, Vendruscolo, Rafael, Sabadini, Angelica Martinelli
Format: Article
Language:Spanish
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Summary:The specific gravity ([ME.sub.b]) is one of the main parameters of wood properties. Considering that, this study aimed to evaluate the longitudinal variation of the basic density of the wood of Cordia americana (Linnaeus) Gottshling & J.E. Mill and Alchornea triplinervia (Sprengel) Muller Argoviensis. The trees were selected in a fragment of subtropical semideciduals forest (local name Floresta Estacional Decidual), in Irai-RS, Brazil that, after logging, were measured and scaled by the method of Smalian. To examine the wood density, discs were collected with about two centimeters at positions base, 1.3 m (DBH), 25, 50, 75 and 100% of the height along de stem. Two wedges being withdrawn symmetrical and opposite, which was obtained green volume, wood saturated and dry weight in an oven at 103°C (± 2°C). Alchornea triplinervia (S.) showed homogeneous wood density in the longitudinal direction of the stem, and Cordia Americana (L.) had decreased wood density towards base-top.
ISSN:0103-8478