A morphogenetic crop model for sugar-beet (Beta vulgaris L.)

Lemaire Sébastien, Maupas Fabienne, Cournède Paul-Henry, De Reffye Philippe. 2008. A morphogenetic crop model for sugar-beet (Beta vulgaris L.). In : International Symposium on Crop Modeling and Decision Support : ISCMDS 2008, April 19-22, Nanjing, China. s.l. : s.n., 1-18. International Symposium on Crop Modeling and Decision Support, Nanjing, Chine, 19 Avril 2008/22 Avril 2008.

Résumé : This paper is the instructions for the proceeding of the International Symposium on Crop. Sugar beet crop models have rarely taken into account the morphogenetic process generating plant architecture despite the fact that plant architectural plasticity plays a key role during growth, especially under stress conditions. The objective of this paper is to develop this approach by applying the GreenLab model of plant growth to sugar beet and to study the potential advantages for applicative purposes. Experiments were conducted with husbandry practices in 2006. The study of sugar beet development, mostly phytomer appearance, organ expansion and leaf senescence, allowed us to define a morphogenetic model of sugar beet growth based on GreenLab. It simulates organogenesis, biomass production and biomass partitioning. The functional parameters controlling source-sink relationships during plant growth were estimated from organ and compartment dry masses, measured at seven different times, for samples of plants. The fitting results are good, which shows that the introduced framework is adapted to analyse source-sink dynamics and shoot-root allocation throughout the season. However, this approach still needs to be fully validated, particularly among seasons.

Mots-clés Agrovoc : Beta vulgaris

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

Auteurs et affiliations

• Lemaire Sébastien, CIRAD-BIOS-UMR AMAP (FRA)
• Maupas Fabienne, Institut technique de la betterave (FRA)
• Cournède Paul-Henry, Ecole centrale Paris (FRA)
• De Reffye Philippe, CIRAD-BIOS-UMR AMAP (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/548606/)

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