Adaptation of the GreenLab model for analyzing sink-source relationships in Chinese Pine saplings

Hong Guo 1, * Veronique Letort 2, 3 Lingxia Hong 1 Thierry Fourcaud 4 Paul-Henry Cournède 2, 3 Yuanchang Lu 1 Philippe de Reffye 3, 4
* Corresponding author
3 DIGIPLANTE - Modélisation de la croissance et de l'architecture des plantes
MAS - Mathématiques Appliquées aux Systèmes - EA 4037, Inria Saclay - Ile de France, Ecole Centrale Paris, CIRAD - Centre de Coopération Internationale en Recherche Agronomique pour le Développement
Abstract : Since the 1990s, a new generation of models has emerged to simulate tree growth with consideration of both tree structure and functional processes. However, calibration of these functional-structural models (FSMs) often remains an open problem due to the topological complexity of trees and to the heavy measurements required. In this paper, we explore a possible way for dealing with the fitting problem, based on the GreenLab model approach. Detailed organ-level data including topological and geometrical measurements were collected on eight Chinese Pine saplings (Pinus tabulaeformis carr.) grown near Beijing. Adaptation of GreenLab to introduce a flexible modeling for biomass allocation to ring growth is presented. The main assumptions, such as allometry rules and sink relationships, were investigated. The problem of calibration of a complex branching structure was solved by defining an average tree. The results were interpreted with particular focus on the ones concerning the hidden mechanisms of secondary growth.
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Hong Guo, Veronique Letort, Lingxia Hong, Thierry Fourcaud, Paul-Henry Cournède, et al.. Adaptation of the GreenLab model for analyzing sink-source relationships in Chinese Pine saplings. PMA06, Plant growth modeling, Simulation, Visualization and Applications, Nov 2006, Beijing, China. pp.236-243. ⟨hal-00576583⟩

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