PeerJ (Nov 2023)

Estimate of lysine nutritional requirements for Japanese quail breeders

  • Lizia Cordeiro de Carvalho,
  • Manoela Garcia Borgi Lino de Sousa,
  • Jaqueline Aparecida Pavanini,
  • Tadia Emanuele Stivanin,
  • Nelson José Peruzzi,
  • Alan Rodrigo Panosso,
  • Michele Bernardino de Lima,
  • Edney Pereira da Silva

DOI
https://doi.org/10.7717/peerj.15637
Journal volume & issue
Vol. 11
p. e15637

Abstract

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Background Japanese quail breeders are the basis for genetic improvement and multiplication for commercial layers, however, there have been no known studies on the optimal lysine level for these birds. Thus, study the egg output response to the lysine (Lys) supply using different e-functions and evaluate the that best fit, have allowed the partition the lysine requirements for maintenance, both weight and egg output maximum. Methods The objectives of this study were to identify the responses to various Lys levels, identify the functions related to these responses and determine the ideal Lys intake amount for Japanese quail breeders. A completely randomized design of seven treatments with seven replicated was used. Treatments consisted of diet supplementation by Lys in concentrations of 16.8, 11.8, 8.4, 6.7, 5.0, 3.4, and 1.7 g/kg. Six exponential models were adjusted. Results The level of Lys was found to affect bird responses (P < 0.001). The birds responded to the levels provided, allowing for the creation of a lysine response curve. A monomolecular function with four parameters was balanced against the statistics of adjustment and selection of models. It was possible to estimate the level of lysine required for maintenance as 133 ± 2 mg/kg BW0.67, and based an average of 41% efficiency, 22 mg Lys produced 1 g of egg output (EO). The daily intake calculated by the monomolecular factorial model was 284 mg Lys for a bird with 0.170 kg body weight and production of 10 g EO/day. The four-parameter monomolecular function proposed in this study is adequate for interpreting the animal response and calculating lysine intake for breeders.

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