Clermont-Dauphin Cathy, Ndienor Moussa, Diongue Djim M.L., Ba Halimatou Sadyane, Leroux Louise, Jourdan Christophe, Letourmy Philippe, Roupsard Olivier, Seghieri Josiane.
2022. Does the management of Faidherbia albida trees in Senegalese parklands affect their ecological services to improve millet sustainability?.
In : En transition vers un monde viable
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Url - éditeur : https://conferium.com/Clients/226_web/index.lasso?lang=fr
Résumé : Agroforestry systems in central Senegal, commonly referred as parklands, are mostly composed of Faidherbia albida trees scattered in pearl millet or in groundnut crops. Many studies showed that this Nitrogen-fixing legume tree increased millet production and soil fertility. Most studies consisted of comparing millet yield under and far outside the tree crown of isolated, mature and non-pruned trees. However, how the tree density, tree size and pruning intensity within F.albida parklands may affect the tree services is not known yet. To address this question, a network of 73 contrasted F. albida parklands selected over 5 villages was monitored over the rainy season 2019. The sampled parklands showed various combinations of tree density, tree trunk size and pruning intensity. In each sampled parkland, we set up a pair of plots of 16 m2 on millet crop, one under the canopy of a selected F. albida tree, and the other halfway between this tree and the nearest F.albida tree. Our results showed that millet grain and straw yield, soil organic carbon, N and P Olsen were significantly higher under the tree canopies than halfway between two trees. Multiple Linear Regression Statistics indicated that higher tree density had a significant positive effect on the millet grain yield, and the tree size had a significant positive effect on the soil variables. Unexpectedly, high tree pruning, removing about 60% of the potential tree canopy area, had no significant effect. We concluded that tree density and size may increase F. albida tree services and thus, the millet crop sustainability. Moreover, the current tree pruning intensities allowed farmers benefit simultaneously from direct provisioning services of F. albida trees, and from their indirect services regarding soil fertility and millet yield. These results may help reasoning innovative management practices for these parklands.
Auteurs et affiliations
- Clermont-Dauphin Cathy, IRD (THA)
- Ndienor Moussa, ISRA (SEN)
- Diongue Djim M.L., UCAD (SEN)
- Ba Halimatou Sadyane, ISRA (SEN)
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Leroux Louise, CIRAD-PERSYST-UPR AIDA (KEN)
ORCID: 0000-0002-7631-2399
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Jourdan Christophe, CIRAD-PERSYST-UMR Eco&Sols (FRA) ORCID: 0000-0001-9857-3269
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Letourmy Philippe, CIRAD-PERSYST-UPR AIDA (FRA) ORCID: 0000-0003-1040-0860
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Roupsard Olivier, CIRAD-PERSYST-UMR Eco&Sols (SEN) ORCID: 0000-0002-1319-142X
- Seghieri Josiane, IRD (FRA)
Source : Cirad-Agritrop (https://agritrop.cirad.fr/601942/)
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