Effects of oleaginous yeast on growth performance, fatty acid composition of muscles, and energy utilization by poultry

H. S. Hussein, R. I. Mackie, N. R. Merchen, D. H. Baker, C. M. Parsons

Research output: Contribution to journalArticlepeer-review

Abstract

The nutritive value of high-fat yeast (HFY; Cryptococcus curvatus) was evaluated in two experiments. In Experiment 1, chicks were used to compare effects of supplemental fat from HFY or tallow on growth performance and fatty acid composition of breast and thigh muscles. In Experiment 2, adult cockerels were used to determine the true metabolizable energy value of HFY. Feeding HFY did not exert any negative effects on chick performance and it improved feed efficiency by 6% over a control (no added fat) diet. However, chicks gained more slowly and had lower gain/feed when HFY replaced tallow in the diet. Chicks fed HFY had a lower proportion of oleic acid in breast and thigh muscles, despite the higher proportion of oleic acid in HFY than tallow. True metabolizable energy of HFY was much lower than anticipated and suggests that the digestibility of fat from HFY was low. Physical or chemical treatment of HFY seems necessary to enhance the energy value of HFY as a potential animal feed supplement.

Original languageEnglish (US)
Pages (from-to)125-130
Number of pages6
JournalBioresource Technology
Volume55
Issue number2
DOIs
StatePublished - Feb 1996

Keywords

  • Energy
  • Fat
  • Fatty acids
  • Growth
  • Lactose
  • Yeast

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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