%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture non répertoriées par l'AERES
%A Bossoukpe, M.
%A Ndiaye, O.
%A Diatta, O.
%A Diatta, S.
%A Audebert, A.
%A Couteron, Pierre
%A Leroux, L.
%A Diouf, A.A.
%A Dendoncker, M.
%A Faye, E.
%A Taugourdeau, S.
%T Unmanned aerial vehicle for the assessment of woody and herbaceous phytomass in Sahelian savanna
%D 2021
%L fdi:010084079
%G ENG
%J Revue d'Elevage et de Médecine Vétérinaire des Pays Tropicaux
%@ 0035-1865
%K SAHEL ; SENEGAL
%N 4
%P 199-205
%R 10.19182/remvt.36802
%U https://www.documentation.ird.fr/hor/fdi:010084079
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2022-02/010084079.pdf
%V 74
%W Horizon (IRD)
%X The phytomass of herbaceous and woody plants is the main source of feed for pastoral livestock in the Sahelian savanna. The assessment of the available feed-stock plays a key role in national livestock policies and generally requires many field measurements of both herbaceous and woody plants. In this study, we tested the possibility of using a red-green-blue (RGB) unmanned aerial vehicle (UAV) to evaluate the phytomass of both woody and herbaceous species. We thus mapped 38 one-hectare plots with a Dji Spark UAV in Northern Senegal. The herbaceous phy-tomass was measured on the ground. For the woody communities, we evaluated the leaf phytomass using dendrometric parameters combined with allometric equations. We performed partial-least-square regressions between UAV-based three-dimension and color indices and phytomass. Results showed a Q² (cross-validation results for each response variable) of 0.57 for woody phytomass, 0.68 for herbaceous dry mass, and 0.76 for their fresh mass. This study confirmed the relevance of using low-cost RGB UAV to assess savanna phytomass.
%$ 082 ; 076 ; 126