Animal Bioscience

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Chemical composition and standardized ileal digestibility of crude protein and amino acid in whole yeast and autolyzed yeast derived from sugarcane ethanol production fed to growing pigs

  • Kaewtapee, Chanwit (Department of Animal Science, Faculty of Agriculture, Kasetsart University) ;
  • Jantra, Nontawut (Department of Animal Science, Faculty of Agriculture, Kasetsart University) ;
  • Petchpoung, Krittaya (Scientific Equipment and Research Division Kasetsart University, Bangkhen Campus) ;
  • Rakangthong, Choawit (Department of Animal Science, Faculty of Agriculture, Kasetsart University) ;
  • Bunchasak, Chaiyapoom (Department of Animal Science, Faculty of Agriculture, Kasetsart University)
  • Received : 2021.12.10
  • Accepted : 2022.03.21
  • Published : 2022.09.01
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Abstract

Objective: This research determined the chemical composition and the apparent and standardized ileal digestibility (AID and SID) of crude protein (CP) and amino acids (AA) in whole yeast and autolyzed yeast derived from sugarcane ethanol production fed to growing pigs. Methods: Six growing pigs were randomly allocated in a replicated 3×3 Latin square design with 3 diets and 3 periods of 7 days each, resulting in a total of 6 experimental replications. Three assay diets were formulated using whole yeast, autolyzed yeast, or soybean meal as the sole sources of dietary CP and AA. Pigs were allowed to adapt to the assay diets for 5 days. Thereafter, ileal digesta samples were collected continuously for 8 hours on days 6 and 7. Results: There was no difference in the chemical composition between whole yeast and autolyzed yeast, but whole yeast had low digestibility of CP and AA due to the presence of a rigid cell wall. As conducting autolysis can induce cell wall damage, the AID and SID of CP and AA were greater in autolyzed yeast than in whole yeast. Conclusion: The information obtained on the SID of CP and AA in both yeast products can be used for the accurate estimation of the bioavailability of CP and AA in feed formulations. The yeast products derived from sugarcane ethanol production are an alternative protein source in pig diets.

Keywords

Acknowledgement

Financial support of the project by Mith Phol Bio Fuel Co., Ltd. (Bangkok, Thailand) is gratefully acknowledged.

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