Soybean protein degradation in the rumen through nylon bags €œin situ€

Authors

  • Laércio Melotti Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Pirassununga, SP
  • Edison Valvasori Instituto de Zootecnia, Divisão de Zootecnia de Bovinos Leiteiros, Seção de Criação e Manejo do Gado Leiteiro, Nova Odessa, SP
  • Carlos de Sousa Lucci Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Pirassununga, SP
  • José Carlos Machado Nogueira Filho Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Pirassununga, SP

Keywords:

cattle, soybean protein. rumen degradability, solubility

Abstract

Six crossbred (5/8 European x 3/8 Zebu) steers with ruminal cannula were used in a 3x3 change-over design to compare soybean protein degradation in situ, with the treatments: A) raw ground soybean meal, B) ground-toasted soybean, and C) commercial soybean oil meal. After 21 days of adaptation for each subperiod, protein degradability was measured by the nylon bag technique with incubation times of 0, 1, 3, 6, 12, 24, 48 and 72h, simultaneously the protein solubility was measured. Protein degradability rate and protein solubility were depressed in the toasted soybean (0.041 and 54.78% for toasted soybean against 0.085 and 66.09% for raw soybean, respectively). After 3 hours of incubation only 22.53% of toasted soybean (B) was degradated in comparison with 49.74% of the raw soybean (A).

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Published

2014-01-14

Issue

Section

FORAGE CROPS AND PASTURES

How to Cite

Soybean protein degradation in the rumen through nylon bags €œin situ€. (2014). Bulletin of Animal Husbandry, 49(2), 119-123. http://bia.iz.sp.gov.br/index.php/bia/article/view/855

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