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Phenology of grasslands: a new model

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Abstract

Understanding the phenology of grasses is crucial for grasslands management as it strongly affects the quantity and quality of the biomass. The floral transition (FT) of the apex is induced by the exposition to specific conditions of temperature and photoperiod. Under non-inductive climatic conditions, the apex is vegetative and continually produces leaves. After exposure to cold temperature and long photoperiod, the meristem completes its floral induction and starts floral development. Heading date (HD) constitutes a main marker of the reproductive development. Determinants of the HD identified are the advancement of floral induction, the final number of leaves and the development of the leaves and the spike. The aim of the present work is to present a model of FT for perennial grasses driven by environmental conditions. The HD is simulated from the phyllochrone and organ size, given by a functional-structural model of ryegrass. Model behaviour is assessed using a dataset of HD.
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Dates and versions

hal-02950236 , version 1 (27-09-2020)

Identifiers

  • HAL Id : hal-02950236 , version 1

Cite

Simon Rouet, Leclercq Denis, Marie-Hélène Bernicot, Didier Combes, Romain Barillot, et al.. Phenology of grasslands: a new model. ICROPM2020: Second International Crop Modelling Symposium , Feb 2020, Montpellier, France. ⟨hal-02950236⟩
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