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Influence of dietary supplementation of autolyzed whole yeast and yeast cell wall products on broiler chickens.pdf (374.14 kB)

Influence of dietary supplementation of autolyzed whole yeast and yeast cell wall products on broiler chickens

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posted on 2023-05-21, 11:40 authored by Ahiwe, EU, Abdallh, ME, Chang'a, EP, Apeh OmedeApeh Omede, Al-Qahtani, M, Gausi, H, Graham, H, Iji, PA
Objective: This study evaluated the effect of yeast products on growth performance, visceral organ weights, endogenous enzyme activities, ileal nutrient digestibility and meat yield of broiler chickens fed diets containing autolyzed whole yeast (WY) and yeast cell walls (YCW) at varying levels of inclusion.

Methods: Nine dietary treatments consisting of WY or YCW included at 0.5, 1.0, 1.5, or 2.0 g/kg diet and a control diet without yeast supplementation was used in the experiment. Each of the nine treatments was replicated six times with nine birds per replicate. Birds were housed in cages, in climate-controlled rooms and fed starter, grower and finisher diets.

Results: There was an improvement (p<0.05) in body weight gain and feed conversion ratio on d 10, 24, and 35 for birds fed 1.0 to 2.0 g/kg WY or YCW diet. Small intestine weight was heavier on d 10 and 24 for birds on higher levels of WY and YCW compared to the control group. On d 10 and 24, there was a significant increase (p<0.05) in tissue protein content and pancreatic enzyme activities (trypsin and chymotrypsin) of birds on 1.5 to 2.0 g/kg WY and YCW diets compared to the control group. Compared to the control group, birds on WY (2.0 g/kg diet) and YCW (at 1.5 and 2.0 g/kg diet) had better (p<0.05) protein digestibility on d 24. On d 35, there was significant improvement (p<0.05) in percentage of carcass, absolute and relative breast weight for broiler chickens fed WY and YCW mostly at 2 g/kg diet compared to birds on the control diet.

Conclusion: Supplementation of diets with autolyzed WY and YCW products especially at 1.5 to 2.0 g/kg diet improved broiler chicken performance and meat yield through their positive effects on ileal protein digestibility and pancreatic enzyme activities.


Publication title

Asian - Australasian Journal of Animal Sciences










Tasmanian Institute of Agriculture (TIA)


Asian-Australasian Assoc Animal Production Societies

Place of publication

College Agriculture Life Sciences, Dept Animal Science Technology, Suwon, South Korea, 441-744

Rights statement

© 2020 by Asian-Australasian Journal of Animal Sciences. This is an open-access article distributed under the terms of the Creative Commons Attribution License. (CC BY 4.0) (

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