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

Grillot, Myriam and Guerrin, François and Gaudou, Benoît and Masse, Dominique and Vayssières, Jonathan Multi-level analysis of nutrient cycling within agro-sylvo-pastoral landscapes in West Africa using an agent-based model. (2018) Environmental Modelling and Software, 107. 267-280. ISSN 1364-8152

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Official URL: https://doi.org/10.1016/j.envsoft.2018.05.003

Abstract

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.

Item Type:Article
Additional Information:https://www.sciencedirect.com/science/article/pii/S1364815217304000
HAL Id:hal-02283180
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre de Coopération Internationale en Recherche Agronomique - CIRAD (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
French research institutions > Institut de Recherche pour le Développement - IRD (FRANCE)
Other partners > Montpellier SupAgro (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Université de Toulouse > Université Toulouse - Jean Jaurès - UT2J (FRANCE)
Université de Toulouse > Université Toulouse 1 Capitole - UT1 (FRANCE)
Other partners > Centre de Suivi Ecologique - CSE (SENEGAL)
Other partners > Institut Sénégalais de Recherches Agricoles - ISRA (SENEGAL)
Other partners > Université Cheikh Anta Diop de Dakar - UCAD (SENEGAL)
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Deposited On:05 Sep 2019 13:11

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