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Maderas. Ciencia y tecnología

versão On-line ISSN 0718-221X


WINCK, Rosa Ángela; FASSOLA, Hugo Enrique  e  AREA, María Cristina. Effect of thinning on the anatomical properties of Pinus taeda wood. Maderas, Cienc. tecnol. [online]. 2015, vol.17, n.2, pp.391-406.  Epub 15-Mar-2015. ISSN 0718-221X.

Thinning has technical and economic implications for both, forest production and industrial activity. The aim of this study was to determine the effect of thinning intensity on the anatomical properties of pine wood. Samples were taken at 1,30 m height, from 24 Pinus taeda trees of 20 years old, coming from a thinning treatment. The plantation was intervened at 3 years, with removal of 0%, 50%, 75% and 87,5% of the trees from the initial density (1960 trees/ha). The evaluated variables were: diameter at breast height, total height, diameter on the base of the live crown, height at base of live crown, tracheid length, cell wall thickness and microfibril angle. The tracheid length was higher in 87,5% thinning treatment. Treatments with 0 % and 50% thinning have favored the obtaining of higher values of cell wall thickness and lower values of microfibril angle. Results suggest that this silvicultural practice alters the anatomical properties of Pinus taeda wood and that tracheid length is strongly related to tree size and length of live crown.

Palavras-chave : Cell wall thickness; microfibril angle; thinning intensity; tracheid length.

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