DynACof, a model fro growth, yield, carbon, water, energy balances and ecosystem services of Coffea in agroforestry

Vezy Rémi, Le Maire Guerric, Charbonnier Fabien, Christina Mathias, Georgiou Selena, Imbach Pablo, Hidalgo Hugo G., Alfaro Eric J., Blitz-Frayret Céline, Laclau Jean-Paul, Lehner Peter, Robelo Diego, Loustau Denis, Roupsard Olivier. 2019. DynACof, a model fro growth, yield, carbon, water, energy balances and ecosystem services of Coffea in agroforestry. In : 4th World Congress on Agroforestry. Book of abstracts. Dupraz Christian (ed.), Gosme Marie (ed.), Lawson Gerry (ed.). CIRAD, INRA, World Agroforestry, Agropolis International, MUSE. Montpellier : CIRAD-INRA, Résumé, p. 820. World Congress on Agroforestry. 4, Montpellier, France, 20 Mai 2019/22 Mai 2019.

Résumé : Agroforestry systems (AFS) are complex to model mainly due to the high spatial variability induced by the shade trees. Recently, the microclimate and lighf heterogeneity issue in AFS has been addressed using the 30 ecophysiological process-based model MAESPA (Charbonnier et al., 2013; Vezy et al., 2018). MAESPA surpassed the classical sun/shade dichotomy in AFS (Charbonnier et al., 2014) and provided continuous maps of e.g. available light, light-use~ fficiency and canopy temperature within Coffea Agroforestry Systems (GAS). A step further was to design a crop model for Coffea grown under agroforestry that would benefit from this continuum to estimate ecosystem services on the long term and under climate change scenarios. We designed DynA_Cof, a new process-based growth and yield model to compute plot-scale net and gross primary productivity, carbon allocation, growth, yield, energy, and water balance of GAS according to shade tree species and management, while accounting for fine-scale spatial effects using MAESPA metamodels (Figure 1). DynA_Cof satisfactorily simulated the daily plot-scale gross primary productivity (RMSE= 1.69 gc m-2 d-1 on 1562 days) and the energy and water balances (RMSE: AET = 0.63 mm d-1 , H= 1.27 MJ m-2 d-1, Rn= 1.98 MJ m-2 d-1) compared to measurements from an eddy-flux tower in Aquiares (Costa Rica) and also the NPP for above and below-ground organs, coffee bean yield and shade tree wood production compared to a comprehensive database from this site.

Mots-clés Agrovoc : agroforesterie, arbre d'ombrage, rendement des cultures, Coffea arabica

Mots-clés géographiques Agrovoc : Costa Rica

Mots-clés libres : Agroforestry, Sustainability

Classification Agris : F08 - Systèmes et modes de culture
K10 - Production forestière
F62 - Physiologie végétale - Croissance et développement
P01 - Conservation de la nature et ressources foncières

Auteurs et affiliations

• Vezy Rémi, CIRAD-BIOS-UMR AMAP (FRA) ORCID: 0000-0002-0808-1461
• Le Maire Guerric, CIRAD-PERSYST-UMR Eco&Sols (FRA) ORCID: 0000-0002-5227-958X
• Charbonnier Fabien
• Christina Mathias, CIRAD-PERSYST-UPR AIDA (REU) ORCID: 0000-0003-3618-756X
• Georgiou Selena, CATIE (CRI)
• Imbach Pablo, CATIE (CRI)
• Hidalgo Hugo G., UCR (CRI)
• Alfaro Eric J., UCR (CRI)
• Blitz-Frayret Céline, CIRAD-PERSYST-UMR Eco&Sols (FRA) ORCID: 0009-0003-1169-8168
• Laclau Jean-Paul, CIRAD-DG-Saurs (FRA) ORCID: 0000-0002-2506-214X
• Lehner Peter, Cafetalera Aquiares (CRI)
• Robelo Diego, Cafetalera Aquiares (CRI)
• Loustau Denis, INRA (FRA)
• Roupsard Olivier, CIRAD-PERSYST-UMR Eco&Sols (SEN)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/593062/)

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