Identificación de los anillos anuales de crecimiento de la encina (Quercus ilex. L.)

Carles Gené, Javier Retana Alumbreros, Josep Maria Espelta Morral, Marc Gràcia Moya

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Resum

The growth pattem of the holm oak (Quercus ilex L.) is difficult to interpret due to varied features of its wood. In order to find a practical as well as reliable method for interpreting annual tree-rings of the holm oak, two approaches have been tried: the study of basal disks and the study of 5 mm-diarneter, and 12 mm-diameter cores taken with a Pressler borer. We do not recommend the use of disks because the sampled individuals are destroyed during collection, and because with none of the methods used for treating wood (polishing and cutting) is it possible to show the vessels, which are the clearest form of identifying different tree-rings. Cores are easily manipulated and allow the survival of sampled trees; nevertheless, the traditional 5 mm-diameter cores are not adequate because holm oak wood is crossed by many wood rays, which prevent the definition of tree-ring limits. This problem has been solved using 12 mm-diameter which, after cutting, clearly show the vessel pattem. By means of dated samples of holm oak wood it has been possible to establish that the number of annual growth rings and the number of years differ in fewer than two or three units. The high correlation between both variables makes the propossed method highly efficient for interpreting age and growth patterns of the holm oak.
Títol traduït de la contribucióMethods for interpreting annual tree-rings of holm oak (Quercus ilex L.)
Idioma originalEspanyol
Pàgines (de-a)127-139
Nombre de pàgines13
RevistaOrsis : organismes i sistemes (Ed. impresa)
Volum8
Estat de la publicacióPublicada - 1993

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