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

摘要

This paper is the instructions for the proceeding of the InternationalSymposium on Crop. Sugar beet crop models have rarely taken into account themorphogenetic process generating plant architecture despite the fact that plantarchitectural plasticity plays a key role during growth, especially understress conditions. The objective of this paper is to develop this approach byapplying the GreenLab model of plant growth to sugar beet and to study thepotential advantages for applicative purposes. Experiments were conducted withhusbandry practices in 2006. The study of sugar beet development, mostlyphytomer appearance, organ expansion and leaf senescence, allowed us to definea morphogenetic model of sugar beet growth based on GreenLab. It simulatesorganogenesis, biomass production and biomass partitioning. The functionalparameters controlling source-sink relationships during plant growth wereestimated from organ and compartment dry masses, measured at seven differenttimes, for samples of plants. The fitting results are good, which shows thatthe introduced framework is adapted to analyse source-sink dynamics andshoot-root allocation throughout the season. However, this approach still needsto be fully validated, particularly among seasons.