Requirement of digestible methionine + cystine in Japanese quails during the laying phase

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Abstract

An experiment was carried out with Japanese quails in the initial laying phase, from 43 to 168 days of age, to determine the nutritional requirement of digestible methionine + cystine for this period. 375 quails were used, being fifteen quails used per experimental unit. A total of 5 treatments (0.60, 0.75, 0.90, 1.05 and 1.20% digestible methionine + cystine) were used in a completely randomized design with 5 replicates each. The performance parameters evaluated were feed intake (g / bird), body weight (g), egg weight (g), laying rate (%), egg mass (g eggs.bird.day-1), feed conversion by mass and dozen eggs (g.g-1 of eggs, g.dz-1 of eggs), viability (%) and the body chemical composition (%). The egg quality parameters were: % of component (yolk, albumen and shell relative to egg weight), specific gravity (g mL-1), Haugh unit, yolk index, shell weight per surface area and thickness of the shell (mm). Quadratic effect was found on the performance parameters evaluated (P<0.05), except for age at first egg and viability with linear effect. Regarding egg quality, no significant effect was observed on the variables tested (P>0.05). The nutritional recommendation of digestible methionine + cystine for Japanese quails at laying phase is 0.90% from the maximum point obtained for the egg mass, egg weight and laying rate, corresponding to daily intake of 241.54 mg of digestible methionine + cystine / day, respectively.
Keywords: body composition; egg mass; egg quality; egg weight.

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Published

2023-01-10

How to Cite

PRESTES PERINE MORETTO RODRIGUES, T.; DE OLIVEIRA GRIESER, D.; POZZA, P. C.; ESPEJO STANQUEVIS, C.; FINCO, E. M.; IRENI BENITES, M.; DE OLIVEIRA BRUXEL, T.; MARCATO, S. M. Requirement of digestible methionine + cystine in Japanese quails during the laying phase. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 24, 2023. Disponível em: https://revistas.ufg.br/vet/article/view/72583. Acesso em: 17 jul. 2024.

Issue

Vol. 24 (2023): Continuous publication

Section

ZOOTECNIA

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Copyright (c) 2023 Brazilian Animal Science/ Ciência Animal Brasileira

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