%0 Journal Article
%T Influencia del azulado (mancha azul) en la densidad y estabilidad dimensional de la madera de Pinus sylvestris Influence of blue stain on density and dimensional stability of Pinus sylvestris timber
%A Adri芍n Rey-Prieto
%A Guillermo Riesco-Muˋoz
%J MADERAS : Ciencia y Tecnolog赤a
%D 2012
%I Universidad del B赤o-B赤o
%X La madera de Pinus sylvestris tiene inter谷s comercial aunque su valor se reduce considerablemente cuando presenta hongos de azulado. En el presente estudio se apearon siete pinos procedentes de plantaciones espa olas, y de los fustes se muestrearon 14 rodajas a diferentes alturas. Cuando 谷stas estaban parcialmente azuladas se labraron para obtener probetas peque as sin defectos anat車micos, sobre las que se determin車 la densidad y adem芍s la estabilidad dimensional en volumen y en las tres dimensiones principales de la madera. En cada rodaja se compararon las propiedades f赤sicas de las probetas completamente azuladas y las no azuladas, mediante el an芍lisis de la varianza con un factor. El m谷todo permiti車 analizar la influencia espec赤fica del azulado eliminando otras fuentes de variaci車n: factor 芍rbol, altura en el fuste, anchura de anillos, presencia de albura y edad cambial. Solo en algunas rodajas la madera azulada de pino silvestre result車 significativamente diferente en densidad y contracci車n axial (madera azulada un 1% m芍s densa y con la contracci車n axial un 13% mayor). Pinus sylvestris timber is commercially important, but its value is considerably decreased by the effects of blue stain fungi. Seven pine trees from Spanish plantations were felled for the study, and 14 discs were sampled from different heights in their stems. When the discs showed partial discolouration due to fungal infection, they were cut to produce small defect-free specimens for determining density and dimensional stability (in volume and in the three main dimensions of wood). The physical properties of fully stained and stain free specimens were compared, in each disc, by one-factor analysis of variance. This method enabled analysis of the specific influence of the blue stain fungi while avoiding other sources of variation: tree factor, height in the stem, ring width, presence of sapwood and cambial age. However, the only significant differences between discoloured and unstained wood were in the density and axial shrinkage, in some discs (the density of the blue-stained wood was 1% higher and the axial shrinkage 13% higher than in the unstained wood).
%K Pino silvestre
%K Pinus sylvestris
%K densidad
%K contracci車n
%K hongos de azulado
%K Scots pine
%K Pinus sylvestris
%K density
%K shrinkage
%K blue stain
%U http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2012000100010