Efecto de la suplementación energético-proteica sobre el desempeño productivo y perfil metabólico de ovinos en pastoreo en condiciones tropicales.

Abstract

The present investigation was carried out with the objective of evaluating the effect of energy-protein supplementation on productive performance and metabolic profile in grazing sheep under tropical conditions. For this study, 6 Dorper breed sheep were used, with an average age of 17±2,41 months, with an initial body weight (CP) of 54.67±5,72 Kg on average. The animals were distributed in a completely randomized design, in two treatments: Control, group of sheep that did not receive a supplement and the supplemented group that received 500 g per animal of energy-protein supplement formulated to present 18% crude protein (CP). All animals were managed in a rotational grazing system, three paddocks were used with an approximate area of 1554 mt 2 , equipped with feeders and drinkers with unrestricted access to water and mineralizing salt. The experiment lasted 63 days, divided into three periods of 21 days, with one blood collection being carried out per period to quantify serum concentrations of urea, total proteins, albumin, globulin, glucose, and total cholesterol. Supplementation increased blood serum urea nitrogen and globulin concentrations (P <0.05). However, there was no effect of supplementation on serum levels of cholesterol, albumin, total protein, and globulins in the blood (P> 0.10). On the other hand, a higher concentration effect was evidenced on the second day of collection on globulin concentrations tended to increase with supplementation, in this study no effect (P> 0.10) of supplementation on body weight was evidenced end (PCF) of the animals. In conclusion, energy-protein supplementation for Dorper sheep grazing in the middle tropics increases the concentration of serum urea nitrogen and glucose in the blood.