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Maderas. Ciencia y tecnología

versión On-line ISSN 0718-221X


DIAZ BRAVO, Sandro et al. Effect of thinning on growth and some properties of wood of Eucalyptus nitens in a plantation of 15 years old. Maderas, Cienc. tecnol. [online]. 2012, vol.14, n.3, pp.373-388.  Epub 26-Sep-2012. ISSN 0718-221X.

Thinning has significant technical and economic implications for both forest managers and industrial end users. In the present study a 15 year old Eucalyptus nitens thinning experiment was evaluated. Thinnings operations were carried out at 7 and 9 years, with final stockings of 300, 400, 500, 700 and a control treatment of 1070 trees ha-1. The aim was to determine the effect of thinning on (i) stem diameter and tree height, stem slenderness ratio, (ii) competition indices: potentially usefull area (PUA), crown projection area (CPA) and (iii) wood properties: basic density, dynamic modulus of elasticity (Moed) and growth stresses evaluated using the residual deformation of the fiber length (DRL). The results showed that thinning affected tree diameter, slenderness index, PUA and CPA, but not total height. Thinning had no effect on basic density and DRL. On the other hand Moed was affected by thinning, but did not show a clear trend with thinning intensity. The effect of the stem orientation on DRL and Moed showed significantly higher values on the South side.

Palabras clave : E. nitens; thinning; basic density; modulus of elasticity; growth stress.

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