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Maderas. Ciencia y tecnología

versão On-line ISSN 0718-221X

Resumo

COBAS, Ana C; AREA, María C  e  MONTEOLIVA, Silvia. Patterns of variation of wood density and cellular morphometry in Salix babylonica for determining the age of transition between juvenile and mature wood. Maderas, Cienc. tecnol. [online]. 2014, vol.16, n.3, pp.343-354.  Epub 27-Jun-2014. ISSN 0718-221X.

The aim of this work was to determine the patterns of axial and radial variation of the density and cellular morphometry of american willow wood, for determining the age of transition from juvenile to mature wood. The study was conducted on five trees of a 45- years-old plantation of a clone of Salix babylonica, from Entre Rios, Argentina. Samples were taken at three heights and at 9 radial positions of the stem for the determination of basic density and morphometry of fibers and vessels. The radial variation patterns showed a slight increase in magnitude with age, whereas the axial variation showed up between the base and a height of 1.3 m in the stem, presenting different tendencies according to the variable. Depending on the analyzed variable, the age of transition between juvenile and mature wood was 5 to 10 years, or 10 to 15 years. Fiber length and width and vessel diameter were the first characters to mature. The average values of the properties of juvenile and mature wood showed no substantial differences between logs, therefore they could be considered as anatomically and density homogeneous.

Palavras-chave : Radial variations; segmented regression; fibre properties; vessels; juvenile wood.

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