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Anim Biosci > Accepted Articles
https://doi.org/10.5713/ab.21.0416    [Accepted] Published online January 5, 2022.
Standardized ileal digestibility of amino acids of protein sources associated with exogenous enzymes for broilers
Bruno Duarte Alves Fortes1,*  , Heloisa Helena de Carvalho Mello2  , Marcos Barcellos Café2  , Emmanuel Arnhold2  , José Henrique Stringhini2 
1Federal Institute of Education, Science and Technology Goiano, Iporá, 76200-000, Brazil
2Department of Animal Science, Federal University of Goiás, Goiás, 74690-900, Brazil
Correspondence:  Bruno Duarte Alves Fortes, Tel: +55-62-98400-0900, Fax: +55-62-35211591, Email: bruno.fortes@ifgoiano.edu.br
Received: 11 September 2021   • Revised: 27 October 2021   • Accepted: 12 December 2021
Abstract
Objective
Two experiments were conducted to evaluate the effect of enzyme complex (EC) on the standardized ileal digestibility (SID) of amino acids (AA) in corn gluten meal (60%) (CGM), soy protein concentrate (SPC), dried bovine plasma (DBP) and poultry offal meal (POM). Experiments I and II were conducted with broilers in the pre-starter (1 to 7 days of age) and starter (1 to 21 days of age) phases, respectively.
Methods
The treatments consisted of a protein-free diet (PFD) containing feedstuffs either supplemented with EC (xylanase, amylase, and protease) or not. In Experiment I, a total of 360 one-day-old male Cobb-500® broiler chicks were randomly housed in 45 pens, resulting in five replicates with eight birds each, totalizing eight treatments and one PFD group. In Experiment II a total of 270 one-day-old male Cobb-500® broiler chicks were randomly housed in 45 pens, resulting in five replicates with six birds each, totalizing eight treatments and one PFD group. The PFD groups were used to assess the endogenous AA losses. The birds were slaughtered to collect the ileal content.
Results
In the pre-starter phase, the SID of arginine, branched chain-aminoacids, glycine, serine, aspartate, and glutamic acid increased with EC addition. The EC improved the SID of arginine and glutamic acid of CGM; the SID of valine and cystine of SPC; the SID of leucine, glycine, and aspartate of POM and the SID of isoleucine of DBP. In the starter phase, the SID of isoleucine, phenylalanine and glycine increased in EC-supplemented diets. The EC improved the SID of isoleucine of DBP; the SID of phenylalanine of CGM and POM. The SID of AA of SPC was not influenced by the EC.

Conclusion

The addition of an enzyme complex to broiler pre-starter and starter diets is efficient in increasing the SID of AA on SPC, POM and DBP.
Keywords: Enzyme Complex; Feedstuffs; Multivariate Analysis; Poultry


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