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    EFECTO DEL MANEJO SILV脥COLA Y CLASE DE COPA SOBRE LA DENSIDAD B脕SICA DE Eucalyptus nitens

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    This research was curried out in the 8th region andean lower part in Chile and aim to analyze the effect of silvicultural management about Eucalyptus nitens basic density variation. The study was based on a 10 year-old stand which was pruned and thinned at the age of 30 months, evaluating different pruning intensity and thinning density. It was also studied, in every defined treatment, the effect produced by different types of crown on the basic density behavior. The total sample consisted on 36 trees from which 7 different discs were obtained and every one had different: trunk height, being finally calculated their basic density. The results determined that thinning affected the basic density and non-intervened stands presented a minor average basic density than those intervened; on the other hand, those plots with pruning presented the lowest average for this variable. The dominant crown presented a higher basic density than the co-dominant and suppressed one respectively. Concerning wood density in relation to the sample trunk height, this tended to increase from the buton to the tip even though it presented a small decrease in the first sections of the tree.聽 Para analizar el efecto del manejo silv铆cola sobre la variaci贸n de la densidad b谩sica de la madera de Eucalyptus nitens, se estudi贸 una plantaci贸n en el sector precordillerano andino de la VIII regi贸n en Chile. El estudio se realiz贸 en un rodal de 10 a帽os, intervenido a los 2 a帽os y medio de establecido, evalu谩ndose distintas intensidades de poda y densidades de raleo. En cada tratamiento definido, se estudi贸 tambi茅n el efecto de la clase de copa sobre el comportamiento de la densidad b谩sica. Se muestre贸 un total de 36 谩rboles, obteni茅ndose de cada uno, siete discos a diferentes alturas del fuste, calcul谩ndose finalmente su densidad b谩sica. Los resultados determinaron que el raleo afect贸 la densidad b谩sica, presentando los rodales sin intervenci贸n, una densidad b谩sica promedio menor que aquellos intervenidos; en cambio en aquellas unidades muestrales con poda, se presentaron los menores valores promedios para esta variable. La clase de copa dominante present贸 una densidad b谩sica superior a la codominante y suprimida respectivamente. En cuanto al comportamiento de la densidad de la madera en funci贸n de la altura de muestreo en el fuste, 茅sta tendi贸 a aumentar desde la base al 谩pice, aunque present贸 una leve disminuci贸n en las primeras secciones del 谩rbol

    EFECTO DEL MANEJO SILV脥COLA Y CLASE DE COPA SOBRE LA DENSIDAD B脕SICA DE Eucalyptus nitens

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    This research was curried out in the 8th region andean lower part in Chile and aim to analyze the effect of silvicultural management about Eucalyptus nitens basic density variation. The study was based on a 10 year-old stand which was pruned and thinned at the age of 30 months, evaluating different pruning intensity and thinning density. It was also studied, in every defined treatment, the effect produced by different types of crown on the basic density behavior. The total sample consisted on 36 trees from which 7 different discs were obtained and every one had different: trunk height, being finally calculated their basic density. The results determined that thinning affected the basic density and non-intervened stands presented a minor average basic density than those intervened; on the other hand, those plots with pruning presented the lowest average for this variable. The dominant crown presented a higher basic density than the co-dominant and suppressed one respectively. Concerning wood density in relation to the sample trunk height, this tended to increase from the buton to the tip even though it presented a small decrease in the first sections of the tree.聽 Para analizar el efecto del manejo silv铆cola sobre la variaci贸n de la densidad b谩sica de la madera de Eucalyptus nitens, se estudi贸 una plantaci贸n en el sector precordillerano andino de la VIII regi贸n en Chile. El estudio se realiz贸 en un rodal de 10 a帽os, intervenido a los 2 a帽os y medio de establecido, evalu谩ndose distintas intensidades de poda y densidades de raleo. En cada tratamiento definido, se estudi贸 tambi茅n el efecto de la clase de copa sobre el comportamiento de la densidad b谩sica. Se muestre贸 un total de 36 谩rboles, obteni茅ndose de cada uno, siete discos a diferentes alturas del fuste, calcul谩ndose finalmente su densidad b谩sica. Los resultados determinaron que el raleo afect贸 la densidad b谩sica, presentando los rodales sin intervenci贸n, una densidad b谩sica promedio menor que aquellos intervenidos; en cambio en aquellas unidades muestrales con poda, se presentaron los menores valores promedios para esta variable. La clase de copa dominante present贸 una densidad b谩sica superior a la codominante y suprimida respectivamente. En cuanto al comportamiento de la densidad de la madera en funci贸n de la altura de muestreo en el fuste, 茅sta tendi贸 a aumentar desde la base al 谩pice, aunque present贸 una leve disminuci贸n en las primeras secciones del 谩rbol
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