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espanolSe examino la variacion del contenido de humedad verde, y de la densidad basica de la madera, en fustes de arboles de Eucalyptus nitens con dimensiones aserrables, provenientes de una plantacion de 18 anos de edad, crecida en la region del Biobio, Chile. Se seleccionaron 9 arboles aleatoriamente. De cada arbol se obtuvo un conjunto de 8 rodelas, que representaron las siguientes alturas fijas: 0,8 m; 3,2 m; 7,0 m; 9,4 m; 15,0 m; 17,4 m; 23,2 m; y 25,6 m. De cada rodela se obtuvieron muestras al 10, 30, 50, 70 y 90% del radio, en la exposicion cardinal Norte y Sur del fuste, para las determinaciones de contenido de humedad verde y densidad basica. La exposicion cardinal en el fuste, resulto relevante para el contenido de humedad verde, pero no para la densidad basica. Se reportaron cambios significativos en contenido de humedad verde y densidad basica, con la posicion radial y axial en el fuste. Se encontraron distintos patrones de variacion radial, del contenido de humedad verde y de la densidad basica, a lo largo del fuste del arbol. Los cambios radiales (en contenido de humedad verde y densidad basica) fueron menores en la parte alta del fuste, y los cambios axiales, menores en el leno cercano a la corteza. EnglishIn the present study, the variation of green moisture content and basic density in Eucalyptus nitens trees with sawable dimensions were examined, coming from a plantation of 18 year old, grown at the Biobio region, Chile. Nine trees were randomly selected. From each tree a set of 8 discs were obtained, which represented the following fixed heights: 0,8 m; 3,2 m; 7,0 m; 9,4 m; 15,0 m; 17,4 m; 23,2 m; and 25,6 m. From each disk samples were obtained at 10, 30, 50, 70 and 90% of the radius, in the North and South cardinal exposures, for the determinations of green moisture content and basic density. The cardinal exposure in the stem was relevant for the green moisture content, but not for the basic density. Significant changes were reported in green moisture content and basic density, with the radial and axial position in the stem. Different patterns of radial variation, of green moisture content and basic density, were found along stem of the tree. The radial changes (in green moisture content and basic density were minors in the upper part of the stem, and the axial changes were minors near to the bark. Keywords: Eucalypt, linear models, wood physical properties, axial variability,radial variability

Variación del contenido de humedad verde y de la densidad básica de la madera en árboles de Eucalyptus nitens con dimensiones aserrables