Compensatory gain of crossbred heifers supplemented in pastures under evaluation hormonal profile and blood parameters

Authors

  • Geraldo Trindade Júnior Universidade Estadual do Sudoeste da Bahia
  • Robério Rodrigues Silva Universidade Estadual do Sudoeste da Bahia
  • Gleidson Giordano Pinto de Carvalho Universidade Estadual do Sudoeste da Bahia
  • Fabiano Ferreira da Silva Universidade Estadual do Sudoeste da Bahia
  • João Alberto Negrão Universidade de São Paulo
  • Daniele Soares Barroso Universidade Estadual do Sudoeste da Bahia
  • Daniel Lucas Santos Dias Universidade Estadual do Sudoeste da Bahia
  • Patrícia Barcellos Costa Universidade Estadual do Oeste do Paraná

DOI:

https://doi.org/10.5433/1679-0359.2015v36n3p1481

Keywords:

Hormones, Metabolites, Restriction, Refeeding, Cattle.

Abstract

The objective of this experiment was to verify the effect of nutritional management that alternates periods of energy/protein restriction and refeeding of grazing crossbred heifers during their prepuberty on the hormonal profile and blood parameters. The study was conducted at Princesa do Mateiro farm in Ribeirão do Largo, in the southwest region of the state of Bahia. Twenty crossbred heifers 5/8 Dairy Guzerat x 3/8 Dutch with an average age of 12 months and average body weight of 187 ± 13.74 kg were used at the beginning of the experiment. It lasted 238 days, 14 out of them were for the animals’ adaptation. The animals were kept in rotational grazing of Brachiariabrizantha cv. Marandú pastures and randomly assigned to two treatments: Control (T100) = animals receiving concentrate supplement to supply 100% of the nutrients requirement to gain 750 g day-1 of live weight and Compensatory Nutrition (CN). The animals of the CN treatment alternated periods of Restriction (T80) = receiving concentrate supplement to meet 80% of the demand for nutrients of the (T100) and periods of Refeeding (T120) = getting concentrate supplement to supply 120% of the nutrient requirements of the (T100 The final plasma concentrations of IGF-I, glucose and urea were higher (P<0.05) in the animals undergoing compensatory nutrition (CN) treatment. The insulin, cholesterol, progesterone and protein levels of the animals from Control and CN nutritional systems did not changed (P>0.05). There were positive correlations (P<0.05) between IGF-I, insulin, glucose and cholesterol, and a negative correlation (P<0.05) between IGF-I and urea. There were also positive correlation (P<0.05) between insulin and glucose and positive correlation (P<0.05) between glucose and cholesterol. There was a negative correlation (P<0.05) of the urea with cholesterol, progesterone and protein. Progesterone also showed a positive correlation (P<0.05) with the protein.

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Author Biographies

Geraldo Trindade Júnior, Universidade Estadual do Sudoeste da Bahia

Zootecnista, Prof. Dr., Universidade Estadual do Sudoeste da Bahia, UESB, campus de Itapetinga, BA.

Robério Rodrigues Silva, Universidade Estadual do Sudoeste da Bahia

Zootecnista, Prof. Dr., Universidade Estadual do Sudoeste da Bahia, UESB, campus de Itapetinga, BA.

Gleidson Giordano Pinto de Carvalho, Universidade Estadual do Sudoeste da Bahia

Zootecnista, Prof.. Dr.,Universidade Federal da Bahia, UFBA, Salvador, BA.

Fabiano Ferreira da Silva, Universidade Estadual do Sudoeste da Bahia

Médico Veterinário, Prof. Dr., UESB, campus de Itapetinga, BA.

João Alberto Negrão, Universidade de São Paulo

Zootecnista, Prof. Dr., Universidade de São Paulo, USP, campus de Pirassununga, SP.

Daniele Soares Barroso, Universidade Estadual do Sudoeste da Bahia

Zootecnista, Discente de Mestrado, UESB, campus de Itapetinga, BA.

Daniel Lucas Santos Dias, Universidade Estadual do Sudoeste da Bahia

Zootecnista, Discente de Doutorado,UESB, campus de Itapetinga, BA.

Patrícia Barcellos Costa, Universidade Estadual do Oeste do Paraná

Médica Vterinária, Profª Drª, Universidade Estadual do Oeste do Paraná, UNIOESTE, campus de Marechal Cândido Rondon, PR.

Published

2015-06-10

How to Cite

Trindade Júnior, G., Silva, R. R., Carvalho, G. G. P. de, Silva, F. F. da, Negrão, J. A., Barroso, D. S., … Costa, P. B. (2015). Compensatory gain of crossbred heifers supplemented in pastures under evaluation hormonal profile and blood parameters. Semina: Ciências Agrárias, 36(3), 1481–1494. https://doi.org/10.5433/1679-0359.2015v36n3p1481

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