Estimate of lysine nutritional requirements for Japanese quail breeders.

Autor:	de Carvalho LC; Universidade Estadual Paulista, Department of Animal Science, College of Agriculture and Veterinary Sciences, Jaboticabal, São Paulo, Brasil., de Sousa MGBL; Universidade Estadual Paulista, Department of Animal Science, College of Agriculture and Veterinary Sciences, Jaboticabal, São Paulo, Brasil., Pavanini JA; Universidade Estadual Paulista, Department of Animal Science, College of Agriculture and Veterinary Sciences, Jaboticabal, São Paulo, Brasil., Stivanin TE; Genetic improvement of Japanese Quails, Vicami Codornas, Assis, São Paulo, Brasil., Peruzzi NJ; Universidade Estadual Paulista, Department of Animal Science, College of Agriculture and Veterinary Sciences, Jaboticabal, São Paulo, Brasil., Panosso AR; Universidade Estadual Paulista, Department of Animal Science, College of Agriculture and Veterinary Sciences, Jaboticabal, São Paulo, Brasil., de Lima MB; Universidade Estadual Paulista, Department of Animal Science, College of Agriculture and Veterinary Sciences, Jaboticabal, São Paulo, Brasil., da Silva EP; Universidade Estadual Paulista, Department of Animal Science, College of Agriculture and Veterinary Sciences, Jaboticabal, São Paulo, Brasil.
Jazyk:	angličtina
Zdroj:	PeerJ [PeerJ] 2023 Nov 06; Vol. 11, pp. e15637. Date of Electronic Publication: 2023 Nov 06 (Print Publication: 2023).
DOI:	10.7717/peerj.15637
Abstrakt:	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 BW 0.67 , 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. Competing Interests: Tadia Emanuele Stivanin is employed by Vicami Codornas. (©2023 Carvalho et al.)
Databáze:	MEDLINE
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