Asian-Australasian Journal of Animal Sciences (Nov 2015)

Effect of Lipid Sources with Different Fatty Acid Profiles on Intake, Nutrient Digestion and Ruminal Fermentation of Feedlot Nellore Steers

  • Giovani Fiorentini,
  • Isabela P. C. Carvalho,
  • Juliana D. Messana,
  • Roberta C. Canesin,
  • Pablo S. Castagnino,
  • Josiane F. Lage,
  • Pedro B. Arcuri,
  • Telma T. Berchielli

DOI
https://doi.org/10.5713/ajas.15.0130
Journal volume & issue
Vol. 28, no. 11
pp. 1583 – 1591

Abstract

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The present study was conducted to determine the effect of lipid sources with different fatty acid profiles on nutrient digestion and ruminal fermentation. Ten rumen and duodenal fistulated Nellore steers (268 body weight±27 kg) were distributed in a duplicated 5×5 Latin square. Dietary treatments were as follows: without fat (WF), palm oil (PO), linseed oil (LO), protected fat (PF; Lactoplus), and whole soybeans (WS). The roughage feed was corn silage (600 g/kg on a dry matter [DM] basis) plus concentrate (400 g/kg on a DM basis). The higher intake of DM and organic matter (OM) (p0.05), such as the molar percentage of acetate, propionate, butyrate and the acetate:propionate ratio. Treatments PO, LO and with WS decreased by around 50% the concentration of protozoa (p<0.001). Diets with some type of protection (PF and WS) decreased the effects of lipid on ruminal fermentation and presented similar outflow of benefit UFA as LO.

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