Response of broilers to digestible sulfur amino acids and threonine intake: maximum economic return

  • Matheus De-Paula Reis São Paulo State University
  • Mirella Cunha-Melaré São Paulo State University
  • Gabriel Silva-Viana São Paulo State University
  • Daniella C. Zanardo-Donato São Paulo State University
  • Nilva Kazue-Sakomura São Paulo State University
Keywords: amino acid supplementation, dose-response, economic return, feed cost, gross margin, growth performance, poultry, segmented model

Abstract

Background: The determination of amino acid supplements for broiler chicken requirements based on performance does not always reflect maximum profitability. Objective: To estimate the optimal levels of digestible threonine (Thr) and sulfur amino acids (SAA) in diets for broilers based on an economic analysis. Methods: Two dose-response assays were conducted, and each assay was divided into three phases: initial (1-14 days), grower (15-28 days), and finisher (29-42 days). Five hundred and sixty male Cobb 500® broilers were randomly distributed to seven treatments with increasing levels of the amino acid (SAA or Thr), with four replicates and 20 birds each. Bodyweight gain (BWG) and feed intake (FI) were used to fit a segmented model. Gross income (GI), total feed costs (TFC) and gross margin (GM) were calculated based on local values. Results: Increasing levels of amino acid elicited a response in BWG and FI for all evaluated phases. The estimates for maximum profit based on GI and TFC were 223, 504, and 975 mg SAA/bird/d, and 236, 696, and 1,042 mg Thr/bird/d in starter, grower and finisher phases, respectively. Conclusion: Varying the AA prices affected only slightly the economic optimal intake of Thr and sulfur amino acids. Despite market fluctuations, the economic approach presented in this study demonstrates to be a helpful tool to choose the ideal inclusion level of amino acids in the feed.

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Author Biographies

Matheus De-Paula Reis, São Paulo State University

https://orcid.org/0000-0001-8255-9032
Department of Zootechnics, Faculty of Agricultural and Veterinary Sciences (FCAV), São Paulo State University (Unesp), Jaboticabal, São Paulo, Brazil.

Mirella Cunha-Melaré, São Paulo State University

https://orcid.org/0000-0002-0211-0954
Department of Zootechnics, Faculty of Agricultural and Veterinary Sciences (FCAV), São Paulo State University (Unesp), Jaboticabal, São Paulo, Brazil.

Gabriel Silva-Viana, São Paulo State University

https://orcid.org/0000-0002-9489-5612
Department of Zootechnics, Faculty of Agricultural and Veterinary Sciences (FCAV), São Paulo State University (Unesp), Jaboticabal, São Paulo, Brazil.

Daniella C. Zanardo-Donato, São Paulo State University

https://orcid.org/0000-0003-3021-3501
Department of Zootechnics, Faculty of Agricultural and Veterinary Sciences (FCAV), São Paulo State University (Unesp), Jaboticabal, São Paulo, Brazil.

Nilva Kazue-Sakomura, São Paulo State University

https://orcid.org/0000-0001-5707-4113
Department of Zootechnics, Faculty of Agricultural and Veterinary Sciences (FCAV), São Paulo State University (Unesp), Jaboticabal, São Paulo, Brazil.

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Published
2020-05-06
How to Cite
De-Paula Reis M., Cunha-Melaré M., Silva-Viana G., Zanardo-Donato D. C., & Kazue-Sakomura N. (2020). Response of broilers to digestible sulfur amino acids and threonine intake: maximum economic return. Revista Colombiana De Ciencias Pecuarias, 33(4), 239-251. https://doi.org/10.17533/udea.rccp.v33n4a04
Section
Original research articles