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A static model is used to evaluate the potential contribution of crop residues to ruminant feeding in the different agro-ecological zones of Burkina Faso. Residues of cereal crops including maize (Zea mays L.), millet (Pennisetum glaucum [L.] R.Br.), sorghum (Sorghum bicolor [L.] Moench) and rice (Oryza sativa L.) represent 90 to 98% of the total quantities of crop residues. These residues are characterized by low crude protein (CP) content (average 4.7%) and low digestibility of organic matter (OMD, average 49.2%). The best quality residues are haulms of cowpea (Vigna unguiculata [L.] Walp) and groundnut (Arachis hypogaea L.) with 12.6 to 15.6% CP and 57 to 61% OMD. Residues of bambara groundnut (Voandzeia subterranea) are of intermediate value: 6.4% CP and 55% OMD. With the current amounts of different residues, a maximum of 8, 54, 98 and 76% of the current ruminant stock, respectively in the Sahelian, Sub-Sahelian, North Soudanian and South Soudanian zones, could be fed at maintenance level during the dry season. Optimum utilization of crop residues in the Soudanian zones may contribute to intensify ruminant livestock production. (Resume d'auteur)

Contribution des résidus de récoltes à l'alimentation des ruminants dans différentes zones agro-écologiques du Burkina Faso