Effects of including autolyzed yeast in the finishing of feedlot steers

Authors

DOI:

https://doi.org/10.5433/1679-0359.2021v42n4p2471

Keywords:

Carcass finishing, Digestibility, Food additive, Prebiotics, Saccharomyces cerevisiae.

Abstract

Functional additives, such as autolyzed yeasts, have been used to achieve greater production efficiency and animal health. These compounds are also alternatives to the use of performance-enhancing antimicrobials. The objective was to evaluate the productive performance, ingestive behavior, apparent digestibility of feed DM and the carcass characteristics of beef steers finished in feedlot receiving autolyzed yeasts in the diet. The experimental design was randomized blocks, consisting of three treatments and six repetitions, where each repetition was represented by a stall with two animals. 36 bulls, ½ Angus × ½ Nelore blood, from the same herd, with an average age of 11 months and an average body weight of ± 330 kg were used. The treatments were as follows: CON - yeast-free diet; Y4 - yeast diet (4 g animal day-1) and Y7 - yeast diet (7 g animal day-1). The product used is a functional ingredient containing the yeast Saccharomyces cerevisiae. The inclusion of autolyzed yeasts resulted in greater daily body weight gain and better feed conversion in the initial feedlot phase. The apparent digestibility of DM of diets containing autolyzed yeast was superior to the control diet, and its use did not interfere with the animal ingestive behavior. Supplementation with autolyzed yeasts at the inclusion level of 4 g day-1 promoted better results in the finishing of feedlot steers, and that the supplemented groups (4 g animal day-1 and 7 g animal day-1) achieved the same degree of carcass finishing, higher than the control group.

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Author Biographies

Giovanna Bobato Pontarolo, Universidade Estadual do Centro Oeste

Student of the Master’s Program, Graduate Program in Veterinary Sciences, Universidade Estadual do Centro Oeste, UNICENTRO, Guarapuava, PR, Brazil.

Mikael Neumann, Universidade Estadual do Centro Oeste

Prof. PhD., Graduate Program in Veterinary Sciences, Graduate Program in Plant Production, UNICENTRO, Guarapuava, PR, Brazil.

Fernando Braga Cristo, Universidade Estadual do Centro Oeste

Student of the Master’s Program, Graduate Program in Veterinary Sciences, Universidade Estadual do Centro Oeste, UNICENTRO, Guarapuava, PR, Brazil.

Edelmir Silvio Stadler Júnior, Universidade Estadual do Centro Oeste

Master in Veterinary Sciences, Graduate Program in Veterinary Sciences, UNICENTRO, Guarapuava, PR, Braail.

André Martins de Souza, Universidade Estadual de Londrina

Student of the Doctoral Program, Graduate Program in Animal Science, Universidade Estadual de Londrina, UEL, Londrina, PR, Brazil.

Milena Pontarolo Machado, Universidade Estadual do Centro Oeste

Undergraduate Student in Veterinary Medicine, UNICENTRO, Guarapuava, PR, Brazil.

Melina Aparecida Bonato, ICC Brazil

Research & Development Department, ICC Brazil, São Paulo, SP, Brasil.

Liliana Longo Borges, ICC Brazil

Research & Development Department, ICC Brazil, São Paulo, SP, Brasil.

Valter Harry Bumbieris Junior, Universidade Estadual de Londrina

Prof. PhD., Department of Animal Science, UEL, PR, Brazil.

Marlon Richard Hilario da Silva, Universidade Federal do Pará

Prof. PhD., Universidade Federal do Pará, UFPA, Belém, PA, Brazil

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Published

2021-05-20

How to Cite

Pontarolo, G. B., Neumann, M., Cristo, F. B., Stadler Júnior, E. S., Souza, A. M. de, Machado, M. P., … Silva, M. R. H. da. (2021). Effects of including autolyzed yeast in the finishing of feedlot steers. Semina: Ciências Agrárias, 42(4), 2471–2488. https://doi.org/10.5433/1679-0359.2021v42n4p2471

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