The effect of grazing intensity and supplementation on performance, stress indicators and metabolic profiles of finishing lambs

Authors

  • João Paulo Ramos Costa Universidade Estadual Paulista
  • Wilton Ladeira da Silva Universidade Estadual Paulista
  • Gregory Caputti de Paula Universidade Estadual Paulista
  • Denise Tsuzukibashi Universidade Estadual Paulista
  • Euclides Braga Malheiros Universidade Estadual Paulista
  • Ana Cláudia Ruggieri Universidade Estadual Paulista
  • João Alberto Negrão Universidade de São Paulo, Faculdade de Zootecnia e Engenharia de Alimentos

DOI:

https://doi.org/10.5433/1679-0359.2015v36n6p3863

Keywords:

Blood parameters, Cortisol, Energy metabolism, Ovine, Pasture, Protein metabolism.

Abstract

In the present study, the effect of grazing intensity (GI) and feed supplementation in sixty-four crossbred Santa Inês lambs was assessed based on performance, blood stress indicators, and metabolic profiles. The GIs analyzed were VH = very high, H = high, L = low, and VL = very low, and were represented by the residual leaf area index (LAIr). The lambs were divided into two groups, supplemented (SP) and non-supplemented (NSP). The dry matter intake (DMI) and average daily gain (ADG) increased linearly with decreasing GI (P < 0.05), and the ADG was higher for the NSP group than the SP group (P < 0.05). The plasma cortisol concentration was higher in the NSP group (P < 0.05), and it was not affected by GIs (P > 0.05). The neutrophil:lymphocyte (N:L) ratio decreased linearly with GI (P < 0.05), and the SP group had a higher N:L ratio (P < 0.05). None of the parameters evaluated for protein metabolism were affected by GI (P > 0.05), except albumin, where the SP group had a higher concentration of this metabolite (P < 0.05). Regarding energy metabolism indicators, glucose showed a linear increase with a decrease in GI (P < 0.05) and was higher in the SP group (P < 0.05); however, there was a decreasing linear effect (P < 0.05) and the NSP group had higher serum levels (P < 0.05) of non-esterified fatty acids (NEFA). The concentration of beta hydroxybutyrate (HBA-B) was higher in the SP group (P < 0.05). The concentration of calcium was affected by GI (P < 0.05). The phosphorus concentration was higher in the SP group (P < 0.05), and concentration of magnesium was not affected by any of the treatments (P > 0.05). It was concluded that GI and SP modified the performance, stress indicators, and metabolic profiles of finishing lambs.

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Author Biographies

João Paulo Ramos Costa, Universidade Estadual Paulista

Discente do Programa de Pós-Graduação em Zootecnia, Depto de Zootecnia, Universidade Estadual Paulista/FCAV, Jaboticabal, São Paulo, SP, Brasil.

Wilton Ladeira da Silva, Universidade Estadual Paulista

Discente do Programa de Pós-Graduação em Zootecnia, Depto de Zootecnia, Universidade Estadual Paulista/FCAV, Jaboticabal, São Paulo, SP, Brasil.

Gregory Caputti de Paula, Universidade Estadual Paulista

Discente do Programa de Pós-Graduação em Zootecnia, Depto de Zootecnia, Universidade Estadual Paulista/FCAV, Jaboticabal, São Paulo, SP, Brasil.

Denise Tsuzukibashi, Universidade Estadual Paulista

Discente do Programa de Pós-Graduação em Zootecnia, Depto de Zootecnia, Universidade Estadual Paulista/FMVZ, Botucatu, São Paulo, SP, Brasil.

Euclides Braga Malheiros, Universidade Estadual Paulista

Prof., Depto Ciências Exatas, FCAV, São Paulo, SP, Brasil.

Ana Cláudia Ruggieri, Universidade Estadual Paulista

Profª, Depto Zootecnia, FCAV, Jaboticabal, São Paulo, SP, Brasil.

João Alberto Negrão, Universidade de São Paulo, Faculdade de Zootecnia e Engenharia de Alimentos

Prof., Depto de Ciências Básicas, Universidade de São Paulo/FZEA, Pirassununga, São Paulo, SP, Brasil.

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Published

2015-12-09

How to Cite

Costa, J. P. R., Silva, W. L. da, Paula, G. C. de, Tsuzukibashi, D., Malheiros, E. B., Ruggieri, A. C., & Negrão, J. A. (2015). The effect of grazing intensity and supplementation on performance, stress indicators and metabolic profiles of finishing lambs. Semina: Ciências Agrárias, 36(6), 3863–3876. https://doi.org/10.5433/1679-0359.2015v36n6p3863

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