MARKERS OF RUMINAL KINETIC ON LACTATING HOLSTEIN x ZEBU COWS

Authors

  • Janaina Januário da Silva Universidade Federal de Minas Gerais
  • Eloísa Oliveira Simões Saliba Universidade Federal de Minas Gerais
  • Luiz Januário Magalhães Aroeira Embrapa Gado de Leite - CNPGL
  • Norberto Mário Rodriguéz Universidade Federal de Minas Gerais
  • André Guimarães Maciel Silva Universidade Federal de Minas Gerais

DOI:

https://doi.org/10.5216/cab.v12i1.1234

Keywords:

cattle production

Abstract

The efficiency of polyethylenoglicol (PEG) and Co-EDTA was evaluated on the estimate of the main parameters that characterize the liquid phase’s kinetics of Holstein x Zebu cows’ rumen. Significant differences were not observed (P>0,05) among the markers for estimates of ruminal volume (l), passage rate (l/h), retention time (h), outflow rate (l/h) and recycling rate (cycles/d). However, Co-EDTA was the most suitable marker and presented more stability than PEG did. When the spectrophotometry (Co-EDTA methodology of analysis) became impossible, the marker PEG can be a cheap alternative and it supplies satisfactory results, since, the meticulousness of the turbidimetric technique is respected.

KEYWORDS: Co-EDTA, liquid phase, outflow rate, polyethylenoglicol, ruminal volume.

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Author Biographies

Janaina Januário da Silva, Universidade Federal de Minas Gerais

Zootecnista, doutora pela Escola de Veterinária da UFMG. Rua Hermínio Marco Calônego, 303. CEP: 18608-200, Botucatu - SP.

Eloísa Oliveira Simões Saliba, Universidade Federal de Minas Gerais

Professora do Depto.de Zootecnia da Escola de Veterinária da UFMG. CEP: 30123-970, Belo Horizonte – MG.

Luiz Januário Magalhães Aroeira, Embrapa Gado de Leite - CNPGL

Pesquisador da Embrapa Gado de Leite - CNPGL.

Norberto Mário Rodriguéz, Universidade Federal de Minas Gerais

Professor do Depto.de Zootecnia da Escola de Veterinária da UFMG. CEP: 30123-970, Belo Horizonte – MG.

André Guimarães Maciel Silva, Universidade Federal de Minas Gerais

Doutorando em Zootecnia na Escola de Veterinária da UFMG. CEP: 30123-970, Belo Horizonte – MG, Brasil.

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Published

2011-03-31

How to Cite

DA SILVA, J. J.; SALIBA, E. O. S.; AROEIRA, L. J. M.; RODRIGUÉZ, N. M.; SILVA, A. G. M. MARKERS OF RUMINAL KINETIC ON LACTATING HOLSTEIN x ZEBU COWS. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 12, n. 1, p. 01–07, 2011. DOI: 10.5216/cab.v12i1.1234. Disponível em: https://revistas.ufg.br/vet/article/view/1234. Acesso em: 27 sep. 2024.

Issue

Vol. 12 No. 1 (2011)

Section

Animal Production

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