Standardized ileal digestible lysine requirement of white commercial layers in peak egg production

Authors

  • Silvana Marques Pastore Universidade Federal de Viçosa
  • Paulo Cezar Gomes Universidade Federal de Viçosa
  • Gabriel da Silva Viana Universidade Federal de Viçosa
  • Eliane Aparecida da Silva Empresa Comércio e Indústria Uniquímica
  • Will Pereira de Oliveira Instituto Federal Fluminense - Campus Bom Jesus do Itabapoana
  • Leonardo Valentino Soares Barbosa Universidade Federal de Minas Gerais
  • Alícia Zem Fraga Faculdade de Ciências Agrarias e Veterinárias - FCAV/Unesp
  • Warley Junior Alves Faculdade de Ciências Agrarias e Veterinárias - FCAV/Unesp

DOI:

https://doi.org/10.14393/BJ-v34n1a2018-37205

Keywords:

digestible amino acids, egg quality, laying hen, nutritional requirements, performance

Abstract

This study was conducted to determine the standardized ileal digestible lysine (SID Lys) requirements for white commercial layers in peak egg production phase. A total of two hundred eighty-eight 24 week-old Hy-Line W-36 layers were randomly assigned to one of six treatments groups, with eight replicates of six hens each. A basal diet, SID Lys-deficient, was graded supplemented with L-Lysine HCl (78.4%) in order to produce experimental treatments (6.0, 6.6, 7.2, 7.8, 8.4 and 9.0 g SID Lys/kg diet). Throughout the 16-week-feeding trial (24 to 40 weeks of age) hens had free access to water and mash feed. Data were analyzed as one-way ANOVA and optimum SID Lys level for each dependent variable assessed were estimated using polynomial and linear broken-line regression model. Feed intake and SID Lys intake were both linearly enhanced by graded SID Lys levels. According to linear broken-line regression model, the breakpoint for egg production, egg weight, and egg mass occurred at 8.14, 8.56 and 8.35 g SID Lys/kg diet, respectively. The breakpoint for feed conversion per egg mass (kg/kg) and per dozen of eggs (kg/dozen) occurred at 8.48 and 7.80 g SID Lys/kg diet, respectively. Eggshell weight and albumen weight were unaffected by dietary SID Lys supply. Weight gain and yolk weight reached optimum values at 8.33 and 8.03 g SID Lys/kg diet, respectively, according to linear broken-line regression model. In conclusion, SID Lys requirement for white commercial layers in peak egg production phase is 8.48 g/kg diet, which corresponds to an average daily SID Lys intake of 813 mg/hen.

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Author Biography

Will Pereira de Oliveira, Instituto Federal Fluminense - Campus Bom Jesus do Itabapoana

Professor do Instituto Federal Fluminense - campus Bom Jesus do Itabapoana - na área de produção animal. Possui graduação, mestrado e doutorado em Zootecnia, com ênfase em Bioclimatologia Animal, pela Universidade Federal de Viçosa, atuando principalmente nos seguintes temas: ambiente térmico, nutrição e desempenho de aves e suínos.

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Published

2017-12-20

How to Cite

PASTORE, S.M., GOMES, P.C., VIANA, G. da S., SILVA, E.A. da, OLIVEIRA, W.P. de, BARBOSA, L.V.S., FRAGA, A.Z. and ALVES, W.J., 2017. Standardized ileal digestible lysine requirement of white commercial layers in peak egg production . Bioscience Journal [online], vol. 34, no. 1, pp. 186–193. [Accessed29 May 2022]. DOI 10.14393/BJ-v34n1a2018-37205. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/37205.

Issue

Section

Agricultural Sciences