Markers evaluation on estimation of faecal output and digestibility in ruminants

Authors

  • Luciano da Silva Cabral UFMT
  • Sebastião Campos Valadares Filho UFV
  • Edenio Detmann UFV
  • Joanis Tilemahos Zervoudakis UFMT
  • Alexandre Lima Souza UFMT
  • Rafael Gonçalves Veloso

Abstract

The present work was carried out in order to evaluate the accuracy of internal and external markers on apparent dry matter digestibility (ADMD) and faecal excretion (FE) estimative in cattle fed diets with corn silage, elephant grass silage and Tifton-85 bermudagrass hay. The indigestible neutral detergent fiber (INDF) and indigestible acid detergent fiber (IADF) obtained in vitro were used as internal markers and the chromium as external marker, which were compared to the digestibility obtained by total collection of faeces, measured from six bovines. INDF and IADF were determined in vitro after 144 hours incubation with ruminal liquid from cattle. FE and ADMD were accurately predicted by chromium and INDF. IADF overestimated FE and underestimated ADMD for the diet based of Tifton-85 bermudagrass hay. The IADF utilization obtained in vitro as marker of FE and ADMD need more investigations and methods standardization.

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Author Biography

Luciano da Silva Cabral, UFMT

possui graduação em Zootecnia pela Universidade Federal Rural do Rio de Janeiro (1995), mestrado (1999) e doutorado (2002) em Zootecnia pela Universidade Federal de Viçosa (1999). Atualmente é professor adjunto ii da Universidade Federal de Mato Grosso, revisor ad hoc - Revista Ciência Rural. Orienta estudantes de Mestrado e Doutorado nos Programas de Pós-Graduação em Agricultura Tropical e Ciência Animal da UFMT, atuando na área de nutrição e produção de ruminantes. É Coordenador do Setor de Ovinocultura e Nutrição Animal da Fazenda Experimental e é Chefe do Laboratório de Nutrição Animal

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Published

2008-04-01

Issue

Vol. 9 No. 1 (2008)

Section

Animal Nutrition

License

Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons

Licença Creative Commons