Ruminai degradability of soybean oil meal and coast-cross hay, with canulated steers fed different ratios of roughageconcentrate in their diets

Authors

  • Adriana Ramenzoni Sefrin Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Pirassununga, SP
  • Carlos de Sousa Lucci Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Pirassununga, SP
  • Laércio Melotti Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Pirassununga, SP

DOI:

https://doi.org/10.11606/issn.2318-3659.v34i1p31-36

Keywords:

Digestibility, Bovine, Fistula, Hay, Soybean meal

Abstract

This work evaluated ruminal degradabilities of soybean oil meal dry matter (DM) and protein (CP), and of coast-cross hay DM and neutral detergent fiber (NFD), through nylon bag technique in situ. For treatments were used different proportions of roughage in D M. rations: A = 40%; B = 60%; C = 80% and D = 100% hay. Sixteen steers with rumen canulas were used in a randomized block design with two replicates for each treatment inside blocks, all diets balanced for nitrogen. DM degradability of soybean oil meal with 24 h of incubation time increased linearly (p < 0.05), with higher levels of roughage from 77.9% to 88.1%. CP degradability of soybean oil meal presented no differences among treatments, with values between 81.7% and 90.4% at 24 h of incubation time. Hay DM and NDF degradabilities showed smaller values (p < 0.01) in the lower roughage level (40%). Total protozoa concentration in rumen fluid showed quadratic regression (p < 0.01), with smallest concentration for the lower roughage level (40%).

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Published

1997-02-01

How to Cite

Sefrin, A. R., Lucci, C. de S., & Melotti, L. (1997). Ruminai degradability of soybean oil meal and coast-cross hay, with canulated steers fed different ratios of roughageconcentrate in their diets. Brazilian Journal of Veterinary Research and Animal Science, 34(1), 31-36. https://doi.org/10.11606/issn.2318-3659.v34i1p31-36

Issue

Section

ANIMAL NUTRITION AND NUTRITIONAL DISEASES