Analysis of the density effects on the source-sink dynamics in Sugar-Beet growthReportar como inadecuado

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* Corresponding author 1 ITB - Institut Technique de la Betterave 2 MAS - Mathématiques Appliquées aux Systèmes - EA 4037 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, Centre de coopération internationale en recherche agronomique pour le développement CIRAD : UMR 4 EGC - Environnement et Grandes Cultures 5 UMR AMAP - Botanique et Bioinformatique de l-Architecture des Plantes

Abstract : Background and Aims: 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. Methods: 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. Keys Results and Conclusions: 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 of phyllochron increase, 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

Autor: Sébastien Lemaire - Fabienne Maupas - Paul-Henry Cournède - Jean-Michel Allirand - Bertrand Ney - P. De Reffye -



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