Free Access
Ann. For. Sci.
Volume 63, Number 1, January-February 2006
Page(s) 9 - 14
Published online 28 January 2006
Ann. For. Sci. 63 (2006) 9-14
DOI: 10.1051/forest:2005093

A method for multiple intra-ring demarcation of coniferous trees

Young-In (David) Park, Guillaume Dallaire and Hubert Morin

Département des Sciences fondamentales, Université du Québec à Chicoutimi, 555 boulevard de l'Université, Saguenay, Québec, Canada

(Received 1 December 2004; accepted 28 September 2005; published online 28 January 2006)

Abstract - Earlywood (E) and latewood (L) are arbitrary concepts, by consequence, the E/L demarcation method is as well. The threshold method has been widely used in wood anatomy as well as wood density. Because of the presence of the intra-annual variation in tree-ring structure, however, the conventional threshold method needs adjustment in an objective and effective way. We suggest the analysis of the error zone method for this adjustment. The method was tested with 500 radial cell files of mature balsam fir, and showed its potential as an objective, robust and easily applicable adjustment tool.

Résumé - Une méthode pour la démarcation intra-cerne multiple de conifère. Le bois initial et le bois final sont des concepts arbitraires, de même que leur démarcation. La méthode de seuil est appliquée généralement dans le domaine de l'anatomie et de la densité du bois. Mais, la méthode conventionnelle du seuil nécessite des ajustements parce qu'il y a des variations dans la structure du cerne. Nous suggérons la méthode de l'analyse de la zone d'erreur pour effectuer cet ajustement. La méthode suggérée a été vérifiée avec 500 files radiales de cellules de sapin baumier matures, et elle a démontré son potentiel comme un moyen objectif, robuste et facile à appliquer.

Key words: multiple intra-ring demarcation / intra-ring variation / wall-lumen ratio / Mork's definition / wood anatomy

Mots clés : démarcation intra-cerne multiple / variation intra-cerne / ratio parois-lumen / définition de Mork / anatomie du bois

Corresponding author: Young-In (David) Park

© INRA, EDP Sciences 2006

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