In vivo and in situ digestibilities and nitrogen balance of Buddleia skutchii as a sole component and mixed with Pennisetum clandestinum in sheep diets

摘要: Abstract The objective of this work was to evaluate the intake (I) all Buddleia skutchii foliage (BSF), collected from three different sites (places: A, B and C) in feeding sheep (phase 1), combination with Pennisetum clandestinum (Pc) 2). Trials feed intake, vivo dry matter digestibility (IVDMD), digestibilities crude protein (CP), acid detergent fiber (ADF), neutral (NDF), nitrogen balance were carried out during phase 1. Diet given nine Creole male lambs 23(±3) kg body weight (BW), located individual metabolism crates. During 2, four treatments evaluated (T1 = 100% Pc, T2 = 20% BSF + 80% T3 = 40% BSF + 60% Pc T4 = 60% BSF + 40% Pc) a 4 × 4 Latin square design, using ruminal cannulated rams 50 ± 2 kg BW remained In (DM, CP gross energy (GE)) kinetics situ disappearance DM evaluated. results 1 indicated that BSF Site had relatively higher (14.9%), ADF (50.6%) content retention (1.93 g d−1). On other hand, showed levels 376.29 g d−1 DM, 56.21 g d−1 CP, 206.24 g d−1 1418.21 kcal (P > 0.05); 54.23% DM, 47.17% 39.31% NDF. Therefore, selected for second as best result. We observed nutrition quality diets result increasing concentration diet. When fed on 40% BSF–60% 900.6 g d−1, GE 70.0, 52.82 55.1%, respectively, observed. There not significant differences among diets, disappearance, Kd Kp, but diet 60% presented (42.3%). allowed validate local knowledge promising forage species, should be incorporated production system.