Caractéristiques physiques et ingestion des blocs multinutritionnels (BMN) à base des feuilles d’<i>Albizia lebbeck</i> associés à la paille de <i>Hyparrhenia diplandra</i> chez la brebis Djallonké au sud-est du Gabon

En saison seche, les complements alimentaires offerts aux petits ruminants contiennent generalement du son de ble ou du mais, qui ne sont pas toujours disponibles. Or, les feuilles d’Albizia lebbeck, legumineuse couramment rencontree dans la region de Franceville, pourrait constituer une alternative a l’utilisation des cereales dans des rations pour ruminants. C’est ainsi que, les caracteristiques physiques et l’ingestion des blocs multinutritionnels (BMN) a base des feuilles d’Albizia lebbeck associees a la paille d’Hyparrhenia diplandra chez la brebis Djallonke, ont ete etudies a Franceville au Gabon en 2017. Trois formules de blocs multinutritionnels a savoir BMN0 (bloc a base de son de ble), BMN50 (son de ble substitue a 50% par les feuilles d’Albizia lebbeck) et BMN100 (son de ble substitue a 100% par les feuilles d’Albizia lebbeck), ont ete utilisees. Les caracteristiques physiques des blocs (cohesion, durete et couleur) ont ete evaluees apres sechage pendant 21 jours. Un dispositif en carre latin (3x3) a permis d’evaluer l’appetibilite et l’ingestion des blocs multinutritionnels associes a la paille d’Hyparrhenia diplandra chez les brebis Djallonke en saison seche. Les resultats ont montre que la cohesion s’est degradee avec le niveau croissant d’inclusion des feuilles d’Albizia lebbeck ; tandis que la durete etait moyenne pour le BMN50 et le BMN100. Les ingestions des BMN etaient de 133,72±27,35 ; 200,90±61,46 et 235,96±106,48 gMS/j/animal, correspondant a des niveaux d’appetibilite de 24,8±2,70 34,17±4,45 et 46,89±8,16%, respectivement pour les blocs BMN0, BMN50 et BMN100. Cette etude a revele aussi que, la consommation des blocs avec inclusion des feuilles d’Albizia lebbeck a augmente significativement l’ingestion de la paille d’Hyparrhenia diplandra. Aussi, cette legumineuse pourrait constituer une alternative a l’utilisation du son de ble dans les blocs a nutriments multiples en saison seche. © 2020 International Formulae Group. All rights reserved. Mots cles: Alimentation, appetibilite, Franceville, legumineuses, petits ruminants English Title: Physical characteristics and intake of multinutrient blocks (BMN) based on Albizia lebbeck leaves associated with Hyparrhenia diplandra’s straw in Djallonke ewes in southeastern of Gabon English Abstract In the dry season, feed supplements for small ruminants usually contain wheat bran or corn, which are not always available. However, the leaves of Albizia lebbeck, legume commonly found in the region of Franceville, could be an alternative to the use of cereals in ruminant rations. Thus, the physical characteristics and intake of Albizia lebbeck leaves based multinutrient blocks (BMN) as supplement to Hyparrhenia diplandra’s straw in Djallonke ewes, were studied at Franceville in 2017. Three types of multinutrient blocks namely BMN0 (block of wheat bran without Albizia lebbeck leaves), BMN50 (wheat bran substituted 50% by Albizia lebbeck leaves) and BMN100 (wheat bran substituted 100% by Albizia lebbeck leaves), were used for this study. The physical characteristics (cohesion, hardness and color) of blocks were evaluated after drying in the shade during 21 days in a well-ventilated area. A Latin square arrangement (3x3) was used to assess the palatability and intake of multinutrient blocks associated with Hyparrhenia diplandra straw for Djallonke ewes at dry season. The results showed that the blocks cohesions of blocks degraded with the increasing level of inclusion of Albizia lebbeck leaves; while hardness was medium for BMN50 and BMN100. Intake of BMN was 133.72 ± 27.35; 200.90 ± 61.46 and 235.96 ± 106.48 gDM/d/animal, corresponding to a palatability of 24.8±2.70, 34.17±4.45 and 46.89±8.16%, respectively for BMN0, BMN50 and BMN100. This study also revealed that consumption of blocks with inclusion of Albizia lebbeck leaves significantly increased Hyparrhenia diplandra’s straw intake. Also, this legume could be an alternative to using wheat bran in multinutrient blocks at dry season. © 2020 International Formulae Group. All rights reserved. Keywords: Feeding, Franceville, legumes, palatability, small ruminants