Simulation of the topological development of young eucalyptus using a stochastic model and sampling measurement strategy

Diao Jun, De Reffye Philippe, Lei Xiangdong, Guo Hong, Letort Véronique. 2012. Simulation of the topological development of young eucalyptus using a stochastic model and sampling measurement strategy. Computers and Electronics in Agriculture, 80 (1) : 105-114.

Quartile : Q1, Sujet : AGRICULTURE, MULTIDISCIPLINARY / Quartile : Q2, Sujet : COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Résumé : Tree crown architecture affects light interception, biomass production and mechanical stability. Crown architecture is largely determined by the topological development of the plant due to meristem activity. Modeling approaches can provide new insights into the dynamics of plant topology, but they are often hampered by experimental difficulties in data collection on complex trees with numerous internodes, especially in tropical tree species that present the additional difficulty of continuous growth with no marked cessation. Tree topological structure shows high variability resulting from genotypic and environmental factors in real stands. In this paper, a stochastic model was developed to describe the topological development of trees. In the model, growth and branching processes are driven by the respective probabilities of activity, rest or death of apical and lateral buds. Because of its mathematical formulation, the model inversion can be done analytically - which is rare - and parameter values can be estimated from experimental data. A new strategy was defined to sample measurements and applied to five eucalyptus trees. Incomplete systems were also defined for the case, common with trees, of incomplete datasets. After parameter estimation, simulation of random eucalyptus tree was presented. The model could describe tree topological development of eucalyptus reasonably well. This work offers a simple and practical method to describe the topological development of trees with continuous growth. It can realistically and flexibly describe the canopy topological development, and has the potential to be integrated with the process of biomass production and allocation for functional-structural plant modeling in the future.

Mots-clés Agrovoc : Eucalyptus, modèle mathématique, mortalité, développement biologique

Mots-clés géographiques Agrovoc : Chine

Classification Agris : U10 - Informatique, mathématiques et statistiques
F62 - Physiologie végétale - Croissance et développement
F50 - Anatomie et morphologie des plantes
K10 - Production forestière

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Diao Jun, Chinese Academy of Forestry (CHN)
• De Reffye Philippe, CIRAD-BIOS-UMR AMAP (FRA)
• Lei Xiangdong, Chinese Academy of Forestry (CHN)
• Guo Hong, Chinese Academy of Forestry (CHN)
• Letort Véronique, Ecole centrale Paris (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/562749/)

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