Efecto de la Acacia melanoxylon en diferentes niveles más enzimas fibrolíticas sobre el comportamiento productivo y digestibilidad en ovinos

Abstract

The objective of the present investigation was to evaluate the effect of Acacia melanoxylon plus fibrolytic enzymes on the productive behavior and digestibility in sheep. This research was carried out at the Faculty of Agricultural Sciences - UTA. 18 weaned sheep with an average weight of 15 kg were used, in a completely randomized design (DCA) with three groups and 6 repetitions, with diets: T0: Control diet that does not contain inclusion of Acacia melanoxylon, T1: 15% inclusion of Acacia melanoxylon and T2: 30% inclusion of Acacia melanoxylon + 0.2% fibrolytic enzymes. Voluntary intake, weight gain, feed conversion and digestibility in sheep were evaluated. The voluntary consumption of Dry Matter was higher (0.0002) for T1 (1265.25) and T2 (1268.85) compared to T0 (863.75), in Organic Matter it showed differences being higher (0.0002) for T1 (1207.43) and T2 (1206.05) in relation to T0 (831.35); In neutral detergent fiber and acid detergent fiber there were very significant differences (<0.0001) between treatments, being the highest T2 (442.00 and 97.72 respectively) for the other treatments. The weight gain obtained differences between treatments (P=0.0288) being higher for T1 (147.90) and the best feed conversion was for T2 (0.08). The apparent digestibility of DM and OM did not show significant differences; however, there is an increase in digestibility in T1 (67.48 MS and 68.42 MO) and T2 (72.97 MS and 75.53 MO) compared to T0 that only obtained (44.18 MS and 45. 14 MO). In neutral detergent fiber they did not show significant differences (0.0002) for T1 (31,40) and T2 (50,27) in relation to T0 (13.92); And the acid detergent fiber did not show significant differences between T0 (22.39) and T1 (22.58) but the best digestibility of (FDA) was obtained by T2 (37.46). The voluntary intake of digestible DM was higher (0.0002) for T1 (874.82) and T2 (908.58) compared to T0 (637.30); In MO, a difference (0.0004) was found, being (846.30) for T1 and (869.50) for T2, while T0 obtained (627.32); FDN and FDA showed significant differences (<0.0001) in T2 (218.88 and 35.58 respectively). The voluntary consumption of the metabolic weight in DM was higher (0.0009) in T1 (106.93) and T2 (109.66) for T0 (79.65); in MO it was higher (0.0013) for T1 (102.03) and T2 (104.23) compared to T0 (76.67); in FDN and FDA in T2 were significantly different for (<0.0001) being (38.20 and 7.81 respectively). It was concluded that the use of Acacia melanoxylon plus fibrolytic enzymes improves the productive performance and digestibility in sheep.