2007
DOI: 10.1590/s1516-35982007000800017
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Exigência nutricional de metionina + cistina digestível para galinhas poedeiras no período de 34 a 50 semanas de idade

Abstract: RESUMO -Com o objetivo de estabelecer a exigência nutricional em metionina + cistina para galinhas poedeiras leves e semipesadas no período de 34 a 50 semanas de idade, 360 poedeiras (metade Lohmann e metade Lohmann Brown) foram submetidas a uma ração basal contendo 2850 kcal EM/kg, 15,0% PB, suplementada com cinco níveis (0,00; 0,052; 0,107; 0,162 e 0,217%) de DL-metionina + cistina, de modo a proporcionar 0,517; 0,569; 0,624; 0,679 e 0,734% de metionina+cistina digestível nas rações. Foi utilizado esquema fa… Show more

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Cited by 21 publications
(41 citation statements)
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“…This increase may be due to an increase in the maintenance requirement as a function of the age of the bird estimated by the BL model as 37, 39, 48 and 52 mg/bird d for the first, second, third and fourth periods, respectively, considering that this model describes the individual response well. The optimal digestible met+cys intake for the four periods was high compared with those reported in the literature (Togashi et al, 2002;Sá et al, 2007;Barbosa et al, 2010). The difference in those results is related to the type of methodology, and the analysis in the current study was used for each period and not for the overall study period.…”
Section: Resultsmentioning
confidence: 54%
See 1 more Smart Citation
“…This increase may be due to an increase in the maintenance requirement as a function of the age of the bird estimated by the BL model as 37, 39, 48 and 52 mg/bird d for the first, second, third and fourth periods, respectively, considering that this model describes the individual response well. The optimal digestible met+cys intake for the four periods was high compared with those reported in the literature (Togashi et al, 2002;Sá et al, 2007;Barbosa et al, 2010). The difference in those results is related to the type of methodology, and the analysis in the current study was used for each period and not for the overall study period.…”
Section: Resultsmentioning
confidence: 54%
“…Several studies have reported the effect of different met+cys intakes on egg mass (Togashi et al, 2002, Sá et al, 2007Barbosa et al, 2010). However, the result in the current study was different from that reported by other researchers such as Varela (2009) who used levels greater than 6.84 g kg −1 met+cys.…”
Section: Resultsmentioning
confidence: 99%
“…Também foi observado efeito linear (P<0,05) dos níveis de lisina digestível da dieta sobre o peso do ovo das aves semipesadas. Esses resultados são semelhantes aos obtidos por diversos autores (Novack & Scheideler, 2004;Jardim Filho et al, 2004;Carvalho et al, 2004;Sá et al, 2007;Geraldo, 2006), que também observaram efeitos significativos dos níveis dietéticos de lisina sobre o desempenho de poedeiras.…”
Section: Resultsunclassified
“…Além do desempenho produtivo, a suplementação de lisina tem efeito sobre a composição dos ovos (Prochaska et al, 1996) e, dependendo do mercado consumidor, esse efeito pode ser explorado comercialmente (Rizzo, 2004). A lisina também é usada como referência (Emmert & Baker, 1997;Sá et al, 2007) na determinação dos níveis dos outros aminoácidos na busca pelo nível de proteína ideal, assim, é importante determinar com acurácia as exigências desse aminoácido em aves poedeiras. De acordo com Macari et al (1994), a ingestão de lisina em excesso pode desencadear efeito aminostático que afeta o consumo.…”
unclassified
“…Quadratic effect was observed for percentage of posture, number of eggs per bird housed and number of eggs per bird, considering the average values of all experimental period. Similarly, Sá et al (2007) evaluated the effect of increasing levels of methionine + cystine in the diet on performance of laying hens from 34 to 50 weeks of age and also observed quadratic effect on egg production.…”
Section: Resultsmentioning
confidence: 99%