Impacts of FMNR on the agricultural performance of smallholder farming systems at landscape scale in Senegal

Leroux Louise, Gbodjo Jean Eudes, Djiba S., Tounkara Adama, Ndao Babacar, Diouf Abdoul Aziz, Soti Valérie, Affholder François, Tall F., Clermont-Dauphin Cathy. 2019. Impacts of FMNR on the agricultural performance of smallholder farming systems at landscape scale in Senegal. 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. 367. World Congress on Agroforestry. 4, Montpellier, France, 20 Mai 2019/22 Mai 2019.

Matériel d'accompagnement : 1 poster

Résumé : Management of isolated trees as an integrated part of smallholder farming systems has long been a key food security strategy in Africa. Current knowledge on the impact of parklands structuring on agrosystems productivity is limited. Combining multisources remote sensing, landscape ecology and statistical modelling, this study aims at evidencing the contribution of FMNR to the agricultural performance of smallholder farming systems at landscape scale in Senegal. Agronomical surveys were conducted in 2017 and 2018 on 70 farmers' fields with heterogeneous trees composition. We assessed groundnut aboveground biomass (AGB) and millet grain yield (GY). Proxies for parklands composition and vegetation productivity were derived from remote sensing. Regression models were calibrated and model parameters were optimized using a random sample consensus method accounting for measurement uncertainties. For 2017, Green chlorophyll index over millet flowering phase and whole groundnut cropping cycle allowed estimating GY and AGB with R² of 0.76 and 0.67 respectively. Integrating information on tree cover structure (fraction of soil covered by trees) increased assessment accuracy by 7% for millet GY (R2=0.83) and 22% for groundnut AGB (R2-0.89). These promising results have to be strengthened with data from ongoing cropping season but they already indicate the need to integrate information on trees at landscape scale to better assess agricultural performance of smallholder farming systems.

Mots-clés Agrovoc : reconstitution forestière, régénération naturelle, conservation des sols, petite exploitation agricole, agroforesterie

Mots-clés géographiques Agrovoc : Sénégal

Mots-clés libres : Parklands, Peanut Basin, Remote sensing, Landscape

Classification Agris : K10 - Production forestière
F08 - Systèmes et modes de culture
P01 - Conservation de la nature et ressources foncières

Auteurs et affiliations

• Leroux Louise, CIRAD-PERSYST-UPR AIDA (SEN) ORCID: 0000-0002-7631-2399 - auteur correspondant
• Gbodjo Jean Eudes, IRSTEA (FRA)
• Djiba S., UCAD (SEN)
• Tounkara Adama, CIRAD-PERSYST-UPR AIDA (FRA)
• Ndao Babacar, CIRAD-PERSYST-UPR AIDA (FRA)
• Diouf Abdoul Aziz, CSE [Centre de suivi écologique] (SEN)
• Soti Valérie, CIRAD-PERSYST-UPR AIDA (SEN)
• Affholder François, CIRAD-PERSYST-UPR AIDA (FRA)
• Tall F., ISRA (SEN)
• Clermont-Dauphin Cathy, INRA (GLP)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/592667/)

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