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Nutritional requirements of digestible methionine + cystine for Japanese quails in production phase

This experiment was carried with Japanese quails in the egg production phase with the objective of determining the requirements of digestible methionine + cystine (M+C) for higher production and egg quality. A total of 240 Japanese quails were distributed in a randomized complete block design. The b...

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Published in:Revista brasileira de zootecnia 2009-12, Vol.38 (12), p.2389-2393
Main Authors: Costa, Fernando Guilherme Perazzo(UFPB CCA Departamento de Zootecnia), Rodrigues, Valéria Pereira(UFPB CCA), Goulart, Cláudia de Castro(UFPB CCA ,UVA CCAB), Vargas Junior, José Geraldo(UFES CCA Departamento de Zootecnia), Silva, José Humberto Vilar da(UFPB CCHSA Departamento de Agropecuária), Souza, Janete Gouveia de(UFRN CCA Departamento de Zootecnia)
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Language:eng ; por
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Summary:This experiment was carried with Japanese quails in the egg production phase with the objective of determining the requirements of digestible methionine + cystine (M+C) for higher production and egg quality. A total of 240 Japanese quails were distributed in a randomized complete block design. The basal diet was supplemented with different DL-methionine levels, corresponding to digestible methionine + cystine levels of 0.55, 0.61, 0.67, 0.73 and 0.79%. The characteristics analyzed were feed intake (g/quail/day), egg production (%), egg weight (g), egg mass (g/quail/day), feed conversion (dozen eggs/egg mass and kg feed/dozen eggs), egg shell (% and g), albumen (% and g), yolk (% and g) and specific gravity (g/cm³). The digestible M+C level for Japanese quails was 0.696% in the diet, corresponding to a daily intake of 186.7 mg/quail. Um experimento com codornas japonesas na fase de produção de ovos foi desenvolvido com o objetivo de determinar a exigência de metionina + cistina digestível para maior produção e melhor qualidade dos ovos. Foram utilizadas 240 aves distribuídas em delineamento em blocos inteiramente casualizados, alimentadas com uma ração basal suplementada com DL metionina, de forma a se obterem 0,55; 0,61; 0,67; 0,73 e 0,79% de metionina + cistina digestível. As características de desempenho analisadas foram consumo de ração (g/ave/dia), produção de ovos (%), peso (g) e massa de ovo (g/ave/dia), conversão alimentar (g de ração/g de ovos e kg de ração/dúzia de ovos), casca de ovo (% e g), albúmen (% e g), gema (% e g) e gravidade específica (g/cm³). O nível de metionina + cistina digestível para codornas japonesas é de 0,696%, que corresponde a consumo diário de 186,7 mg/ave.
ISSN:1516-3598
1806-9290
1806-9290
1516-3598
DOI:10.1590/S1516-35982009001200014