Physical properties of wood in thinned Scots pines (Pinus sylvestris L.) from plantations in northern Spain |
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| Authors: | Guillermo Riesco Muñoz María A Soilán Cañas Roque Roíguez Soalleiro |
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| Institution: | 1. Departamento de Ingeniería Agroforestal, University of Santiago de Compostela, Escuela Politécnica Superior, Campus Universitario s/n., 27002, Lugo, Spain
2. Departamento de Production Vegetal, University of Santiago de Compostela, Escuela Politécnica Superior, Campus Universitario s/n., 27002, Lugo, Spain
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| Abstract: | ? The physical properties of wood and the associated variations within and between trees were evaluated by analysing 770 small specimens of clear wood from 11 Pinus sylvestris L. trees thinned from 3 plantations. ? Within-tree variations in basic density or volumetric shrinkage increased with cambial age and decreased with increasing ring width. The effect of the height in the stem on wood properties was considered indirect and height was not included as an explanatory variable in the mixed models proposed to estimate basic density and volumetric shrinkage. ? The models had random components for the intercept parameter and explained 52.5% of the total variance in basic density and 56% of the total variance in volumetric shrinkage. Linear shrinkage in the direction of the grain was extremely variable. ? Between-tree variation and between-plot variation in the physical properties of wood were high, considering that all trees sampled were growing in similar sites and stands. It would then be desirable to predict physical properties of wood on living trees in order to use the quality of wood as a criterion for timber tree selection in thinnings. |
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