Bossoukpe M., Ndiaye O., Diatta O., Diatta S., Audebert A., Couteron Pierre, Leroux L., Diouf A.A., Dendoncker M., Faye E., Taugourdeau S. (2021). Unmanned aerial vehicle for the assessment of woody and herbaceous phytomass in Sahelian savanna. Revue d'Elevage et de Médecine Vétérinaire des Pays Tropicaux, 74 (4), 199-205. ISSN 0035-1865.
Titre du document
Unmanned aerial vehicle for the assessment of woody and herbaceous phytomass in Sahelian savanna
Année de publication
2021
Type de document
Article
Auteurs
Bossoukpe M., Ndiaye O., Diatta O., Diatta S., Audebert A., Couteron Pierre, Leroux L., Diouf A.A., Dendoncker M., Faye E., Taugourdeau S.
Source
Revue d'Elevage et de Médecine Vétérinaire des Pays Tropicaux, 2021,
74 (4), 199-205 ISSN 0035-1865
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.
Plan de classement
Sciences du monde végétal [076]
;
Etudes, transformation, conservation du milieu naturel [082]
;
Télédétection [126]
