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Year 2018 - Volume 38, Number 8
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Different energy sources during the primiparous dairy cow transition period and its effects on blood metabolites and hormones, 38(8):1691-1695
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ABSTRACT.- Artunduaga M.A.T., Lima J.A.M., Azevedo R.A., Lana A.M.Q., Fortes R.V.S, Faria B.N. & Coelho S.G. 2018. [Different energy sources during the primiparous dairy cow transition period and its effects on blood metabolites and hormones.] Diferentes fontes energéticas durante o período de transição de vacas primíparas e os seus efeitos sobre metabólitos sanguíneos e hormônios. Pesquisa Veterinária Brasileira 38(8):1691-1695. Departamento de Zootecnia, Escola de Veterinária, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, MG 30123-970, Brazil. E-mail: rafaelzooufmg@gmail.com
The aim of this study was to compare the effects of glycogenic supply or lipogenic diets on blood metabolites and hormones in primiparous dairy cows (n=40) during the transition period. The animals were randomly assigned to four treatments: control, calcium salts of polyunsaturated fatty acids (Megalac-E, 100g prepartum and 250g postpartum), roasted soybeans (400g prepartum and 800g postpartum) and propylene glycol (300ml pre- and postpartum). The supplements were provided individually. Blood samples were taken to determine plasma concentrations of insulin, glucose, non-esterified fatty acids (NEFA) and IGF-I. The glucose and insulin concentrations were higher in calcium salts of polyunsaturated fatty acids treatment. The highest concentration of NEFA was observed in the control group. The plasma concentrations of IGF-I were higher for the treatments with lipogenic supplements. Adding calcium salts of polyunsaturated fatty acids diet was able to ease the hormonal and metabolic changes of the transition period features. |
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