Parametric identification of a functional-structural tree growth model and application to beech trees (Fagus sylvatica)

Abstract : Functional-structural models provide detailed representations of tree growth and their application to forestry seems full of prospects. However, owing to the complexity of tree architecture, parametric identification of such models remains a critical issue. We present the GreenLab approach for modelling tree growth. It simulates tree growth plasticity in response to changes of their internal level of trophic competition, especially topological development and cambial growth. The model includes a simplified representation of tree architecture, based on a species-specific description of branching patterns. We study whether those simplifications allow enough flexibility to reproduce with the same set of parameters the growth of two observed understorey beech trees (Fagus sylvatica L.) of different ages in different environmental conditions. The parametric identification of the model is global, i.e. all parameters are estimated simultaneously, potentially providing a better description of interactions between sub-processes. As a result, the source-sink dynamics throughout tree development is retrieved. Simulated and measured trees were compared for their trunk profiles (fresh masses and dimensions of every growth units, ring diameters at different heights) and compartment masses of their order 2 branches. Possible improvements of this method by including topological criteria are discussed.
Type de document :
Article dans une revue
Functional Plant Biology, CSIRO Publishing, 2008, 35, pp.951-963. 〈http://www.publish.csiro.au/paper/FP08065.htm〉. 〈10.1071/fp08065 〉
Liste complète des métadonnées

Littérature citée [53 références]  Voir  Masquer  Télécharger

https://hal.inria.fr/inria-00529461
Contributeur : Veronique Letort <>
Soumis le : lundi 25 octobre 2010 - 16:12:35
Dernière modification le : jeudi 29 mars 2018 - 13:36:02
Document(s) archivé(s) le : mercredi 26 janvier 2011 - 03:21:17

Fichier

Letort_et_al_2008_FSPM07_Beech...
Fichiers produits par l'(les) auteur(s)

Identifiants

Citation

Veronique Letort, Paul-Henry Cournède, Amélie Mathieu, Philippe De Reffye, Thiéry Constant. Parametric identification of a functional-structural tree growth model and application to beech trees (Fagus sylvatica). Functional Plant Biology, CSIRO Publishing, 2008, 35, pp.951-963. 〈http://www.publish.csiro.au/paper/FP08065.htm〉. 〈10.1071/fp08065 〉. 〈inria-00529461〉

Partager

Métriques

Consultations de la notice

761

Téléchargements de fichiers

312