Feedlot performance, feeding behavior and rumen morphometrics of Nellore cattle submitted to different feeding frequencies

  • Juliana da Silva University of São Paulo; FZEA; Dept. of Animal Science
  • Tássia Veluma Barbosa Carrara São Paulo State University; FMVZ; Dept. of Animal Breeding and Nutrition
  • Murillo Ceola Stefano Pereira São Paulo State University; FMVZ; Dept. of Animal Breeding and Nutrition
  • Cassiele Aparecida de Oliveira University of São Paulo; FZEA; Dept. of Animal Science
  • Ivan Carlos Batista Júnior São Paulo State University; FCAT
  • Daniel Hideki Mariano Watanabe São Paulo State University; FCAT
  • André Luiz Nagatani Rigueiro São Paulo State University; FMVZ; Dept. of Animal Breeding and Nutrition
  • Mário De Beni Arrigoni São Paulo State University; FMVZ; Dept. of Animal Breeding and Nutrition
  • Danilo Domingues Millen São Paulo State University; FCAT
Keywords: Zebu, carcass, concentrate, intake, papillae

Abstract

Owing to the lack of information in the literature about the ideal feeding frequency adopted by feedlot systems, this study was designed to evaluate the effect of different feeding frequencies on performance, carcass traits, feeding behavior and rumen morphometrics of Nellore cattle. Forty-eight yearling bulls were housed in individual pens with an average initial body weight of 358.2 kg. The experiment was designed as a completely randomized block and the treatments were the feeding of cattle one, two, three, or four times daily (n = 12 per treatment). Orthogonal contrasts were used to assess linear, quadratic and cubic relationship between feeding frequency and the dependent variable. As feeding frequency increased, final body weight (p = 0.03) and average daily gain (p = 0.01; one: 0.98 kg d–1; two: 0.96 kg d–1; three: 1.18 kg d–1; four: 1.14 kg d–1) increased linearly and the feed:gain ratio decreased (p = 0.02). Also, as feeding frequency increased, hot carcass weight was affected cubically (p = 0.01; one: 246.9 kg; two: 243.0 kg; three: 263.1 kg; four: 258.1 kg). During the adaptation period dry matter intake variation was affected cubically (p ≤ 0.05; one: 16 %; two: 23 %; three: 14 %; four: 16 %). Increases in feeding frequency affected papillae height (p < 0.01) and papillae surface area (p < 0.01) cubically, as well as producing increases in the mitotic index (p = 0.05; one: 9 %; two: 11 %; three: 13 %; four: 13 %) and cells in proliferation (p = 0.05) linearly. Thus, Nellore yearling bulls should be fed three times daily in feedlot operations.

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Published
2018-04-01
How to Cite
Silva, J., Carrara, T., Pereira, M., Oliveira, C., Batista Júnior, I., Watanabe, D., Rigueiro, A., Arrigoni, M., & Millen, D. (2018). Feedlot performance, feeding behavior and rumen morphometrics of Nellore cattle submitted to different feeding frequencies. Scientia Agricola, 75(2), 121-128. https://doi.org/10.1590/1678-992x-2016-0335
Section
Animal Science and Pastures