Influencia de la situación geográfica y la fisiografía en la calidad de la madera de Quercus robur L.

Abstract

They were sampled 35 oaks from some zones of Galicia (Spain). Main biometric properties were registered in them as well as the environmental conditions. The trees were felled to obtain clear and small wood specimens, with standardised dimensions, in which specific gravity was measured. The inter tree variation in specific gravity was checked, being higher the specific gravity in the heartwood. The inter tree variation in specific gravity could be partially explained because of the environmental variations, which do not affect with the same intensity the heartwood and the wood including sapwood. The most significant properties affecting specific gravity were the relief features and the geographical location of the trees. The biometric properties of the trees did not affect significantly the specific gravity. Related to the location, the wood of oak is lighter in trees growing in inner lands, in the east and in high altitudes. The between tree and between zone variation of oak wood quality aims to consider this species as a source of diversity to protect. The location of specific sites for plantations does not lead to obtain more uniform wood for the industry because of the low influence of environmental sources of variation on specific gravity.