Lemaire Sébastien, Maupas Fabienne, Cournède Paul-Henry, Allirand Jean-Michel, De Reffye Philippe, Ney Bertrand.
2010. Analysis of the density effects on the source-sink dynamics in sugar-beet growth.
In : Plant growth modeling and applications. Proceedings PMA09 : The Third International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications, Beijing, China, 9-13 November 2009. Li Baoguo (ed.), Jaeger Marc (ed.), Guo Yan (ed.). China Agricultural University, CIRAD
Résumé : This paper aims at studying the capacity of an individual-based morphogenetic crop model of sugar beet growth - GreenLab - to predict the effects of population density on growth and yield. A field experiment was carried out for three homogeneous population densities to measure detailed plant development and growth of one cultivar. A set of in situ measurements were used to observe some model inputs (organs' expansion times and life-spans) and destructive data of dry masses were collected for model calibration. For all density conditions, the plasticity of total biomass production and allocation patterns was accurately simulated using the sets of optimized parameters. Most of them reveal stable across different spacing, and a few parameters vary with density: specific blade mass, time after which phyllochron increases, petiole sink and the characteristic surface used to compute Beer's law at individual level. These results are a first step towards developing a predictive capacity regarding crop spacing.
Classification Agris : U10 - Informatique, mathématiques et statistiques
F40 - Écologie végétale
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)
- Allirand Jean-Michel, INRA (FRA)
- De Reffye Philippe, CIRAD-BIOS-UMR AMAP (FRA)
- Ney Bertrand, INRA (FRA)
Autres liens de la publication
Source : Cirad - Agritrop (https://agritrop.cirad.fr/556083/)
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