Objective: Pregnant Nelore heifers (n = 417) were used to evaluate the effects of supplementation with monensin-molasses multinutrient block (B) during pre and/or postpartum on reproductive and progeny performance.Methods: Heifers were allocated in four treatments: i) CC: heifers received control supplement (C) in loose meal form (0.06% of body weight [BW] offered daily before and after parturition; n = 108); ii) CB: received C before parturition and B (0.07% of BW offered weekly after parturition; n = 117); iii) BC: received B before and C after parturition (n = 103) and iv) BB: received B before and after parturition (n = 89). During pre and postpartum periods, concentration of metabolites/hormones and cow/calf performance was evaluated over time. Cows were synchronized twice for fixed timed artificial insemination (FTAI) using an estradiol/progesterone-based protocol. Data was analyzed by orthogonal contrasts (C).Results: B increased pregnancy at first FTAI (p = 0.04) and overall pregnancy rate (C1: CC vs BB+BC+CB; p = 0.05). Supplemented cows had greater body condition score (BCS) only at parturition (D0; p = 0.04) and at D40 (p = 0.02). B increased BW (p = 0.03), glucose concentrations (p = 0.01) and subcutaneous fat thickness (p = 0.03) only at D40. Concentrations of insulin were higher in supplemented cows (p = 0.008). Calves born by cows supplemented before and after parturition (C2: BB vs BC+CB) were heavier at 80 (p<0.001), 120 (p<0.001), 170 (p = 0.002) and 210 (p = 0.02) days old.Conclusion: Regardless of period of treatment, block supplementation increased pregnancy at first FTAI and overall pregnancy rate. Additionality, block supplementation during both pre and postpartum periods improved progeny weight until weaning. Block supplementation can be a tool to optimize fertility and calf performance in Nelore primiparous cows.
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Docente e pesquisadora -Curso de Medicina Veterinária -Faculdades Objetivo-ASSOBES-IUESO -Goiânia, GO. ResumoO Brasil é um dos maiores produtores de ração e suplemento mineral e vem apresentando crescimento significativo na produção de alimento nos últimos anos. Para se adaptar as exigências de qualidade do mercado, faz-se necessário adquirir matérias-primas de fornecedores confiáveis, a fim de minimizar os custos e maximizar a qualidade do produto final. Diante desse cenário, esse artigo teve como objetivo avaliar os níveis de garantia de matérias-primas em indústria de suplemento mineral. O estudo foi realizado numa empresa produtora de mistura mineral, localizada na cidade de Goiânia, LEITE, A.A.A. et al. Avaliação dos níveis de garantia de matérias-primas em indústria de suplemento mineral. PUBVET,
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