Free access
Issue
Ann. For. Sci.
Volume 60, Number 4, May-June 2003
Page(s) 371 - 378
DOI http://dx.doi.org/10.1051/forest:2003028
Ann. For. Sci. 60 (2003) 371-378
DOI: 10.1051/forest:2003028

How to relate the standing tree shape to internal wood characteristics: Proposal of an experimental method applied to poplar trees

Thiéry Constant, Frédéric Mothe, Miguel Angel Badia and Laurent Saint-Andre

LERFOB, UMR INRA-ENGREF, Wood Quality Research Team, Research Centre of Nancy, 54280 Champenoux, France
(Received 4 January 2002; accepted 8 July 2002)

Abstract
This paper presents an experimental method allowing 3D measurements of the geometry of a standing mature tree to be closely linked to the spatial distribution of internal wood properties. The accuracy of the geometrical information is assessed from repeated measurements performed on 10 mature poplar trees and demonstrates that wind is the most limiting factor. Since the method was developed to study the spatial distribution of tension wood, some pictures of the latter are presented. Furthermore, some preliminary relationships between variables derived from measurements such as the height, the local tree slope, the eccentricity of the tension wood area, or the eccentricity of the disc are discussed to illustrate the potential of the method.

Résumé
Comment connecter la forme d'un arbre sur pied aux propriétés internes du bois : proposition d'une méthode expérimentale appliquée sur des peupliers. Cet article présente une méthode expérimentale de mesure de la géométrie tridimensionnelle d'un arbre sur pied mature permettant un couplage étroit avec la mesure des propriétés internes du bois. La précision de l'information géométrique est estimée à partir de mesures répétées sur 10 peupliers et met en évidence le vent comme principal facteur limitant. La méthode ayant été développée pour étudier la distribution spatiale du bois de tension, quelques illustrations de cette dernière sont présentées. En outre, des relations préliminaires liant des variables telles que la hauteur, l'inclinaison locale de l'arbre, l'excentricité de la zone de bois de tension ou l'excentricité de la rondelle sont discutées afin d'illustrer le potentiel de la méthode.


Key words: standing tree / 3D digitising / internal structure / reaction wood / metrology

Mots clés : arbre sur pied / digitalisation 3D / structure interne / bois de réaction / métrologie

Correspondence and reprints: Thiéry Constant Tel.: (33) 3 83 39 40 66; fax: (33) 3 83 39 40 69;
    e-mail: constant@nancy.inra.fr

© INRA, EDP Sciences 2003

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