García Díaz, Juan RamónPérez Bello, AlcidesNoval Artiles, ErnestoHernández Barreto, Miguel Alejandro2018-10-172018-10-1720170122-0268https://dspace.uclv.edu.cu/handle/123456789/9862Objective. In order to evaluate the effect of copper parenteral supplementation on cupremia and weight gain in fattening bulls. Materials and methods. Fifty animals hybrids holstein and zebu were selected, with 18-20 months of age, 210 - 220 kg body weight, clinically healthy and in a system of intensive fattening. Two groups of 25 animals were divided, one control and another supplemented with 50 mg of intravenous Cu every 2 months to complete 3 applications; hemochemical indicators and weight gain were evaluated. The variables were compared using the t-Student test for independent samples and growth curves its parameters were determined. Results. Cu supplementation increased (p<0.001) the cupremia, hemoglobin and hematocrit, and (p<0.01) the average daily gain and the weight of the bulls, with increases in weight between .86 y 9.54 % for the treated group. Final Live weight (446 and 586 kg) and average daily gain (534 and 684 g/d) in control and treated group, respectively, were higher in the supplemented animals with Cu. Conclusions. The parenteral suplementation of 50 mg of Cu increased serum levels of Cu, hemoglobin, hematocrit and live weight gain in fattening bulls.en-USEste documento es Propiedad Patrimonial de Universidad de Córdoba y se deposita en este Repositorio solo con fines académicos y exclusivamente para usuarios de la UCLV hasta tanto sea liberado por la revista Revista MVZ Córdoba, respetando la legislación vigente en Cuba sobre derecho de Autor y la política de acceso de la mencionada publicación periódica.CopperGain Live WeightSupplementary FeedingLive weightSuplementosArticleUniversidad de Córdoba, Colombia.doi.org/10.21897/rmvz.1009