Multi-level analysis of nutrient cycling within agro-sylvo-pastoral landscapes in West Africa using an agent-based model

Grillot Myriam, Guerrin François, Gaudou Benoit, Masse Dominique, Vayssières Jonathan. 2018. Multi-level analysis of nutrient cycling within agro-sylvo-pastoral landscapes in West Africa using an agent-based model. Environmental Modelling and Software, 107 : 267-280.

Quartile : Q1, Sujet : COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS / Quartile : Q1, Sujet : ENVIRONMENTAL SCIENCES / Quartile : Q2, Sujet : ENGINEERING, ENVIRONMENTAL

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Géographie-Aménagement-Urbanisme-Architecture

Résumé : Livestock-driven nutrient flows are the main sources of soil and crop fertilization in West African agro-sylvo-pastoral landscapes. They result from nutrient recycling between farm activities and the spatial transfer of nutrients within the landscape. “Extensive” systems, based on livestock mobility are tending to be replaced by more “intensive” systems based on in-barn livestock fattening. We built an agent-based model to compare these systems in terms of nitrogen cycling at land plot, herd, household and village levels. Model evaluation, based on field-data from two real contrasted villages, showed that the model satisfactorily reproduces the differences between an “extensive” and an “intensive” system with key parameters such as variability among households and soil fertility gradients. Simulations highlighted bottlenecks along the nitrogen (N) cycle like accumulation of N in manure heaps and housing areas, reducing N recycling efficiency, especially in “intensive” systems. The model can be further used to explore improved agro-sylvo-pastoral landscapes.

Mots-clés Agrovoc : système agrosylvopastoral, cycle de l'azote, fertilité du sol, élevage intensif, élevage extensif, système d'élevage

Mots-clés géographiques Agrovoc : Afrique occidentale

Mots-clés libres : Biomass flows, Crop-livestock integration, Multi-agent system, Multi-level modeling, Nutrient spatial transfers, Soil fertility management

Classification Agris : F08 - Systèmes et modes de culture
K01 - Foresterie - Considérations générales
F61 - Physiologie végétale - Nutrition
L01 - Élevage - Considérations générales

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

• Grillot Myriam, CIRAD-ES-UMR SELMET (SEN) - auteur correspondant
• Guerrin François, INRA (FRA)
• Gaudou Benoit, Université de Toulouse (FRA)
• Masse Dominique, IRD (FRA)
• Vayssières Jonathan, CIRAD-ES-UMR SELMET (REU) ORCID: 0000-0003-3127-7208 - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/589551/)

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