&lt;b&gt;Níveis dietéticos de metionina e cobre quelatado, treonina e zinco quelatado sobre a composição química do ovo e o teor de colesterol da gema&lt;/b&gt;

Souza, Janaina Cristina da Silva Maciel de

doi:10.11606/d.10.2018.tde-23022018-122854

Cited by 1 publication

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“…Egg are composed of 9.5% eggshell, 24.0% yolk, and 67.5% albumen (Souza, 2017). On average, the cholesterol content of egg yolk varies according to weight: an egg with 60 g of yolk provides about 210 mg of cholesterol (Leeson & Summers, 2001;Spence, Jenkins, & Davignon, 2010).…”

Section: Introductionmentioning

confidence: 99%

Dietary levels of methionine plus cystine and chelated copper on the chemical composition of eggs and yolk cholesterol of 49-week-old brown laying hens

Souza

Neto

2020

SCA

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Highlights:Interaction of dietary levels of methionine + cystine and organic copper. Chemical composition of the egg. Met + Cys was determinant on yolk cholesterol concentration in laying hens. AbstractThe present study aims to evaluate the possible interactions of dietary levels of methionine plus cystine (Met + Cys) and organic copper (Cu) on the chemical composition of eggs, using 320 Hy-Line Brown hens at 49 weeks of age. Composition and deposition variables were evaluated in a 4 × 5 factorial arrangement, with total analysed levels of 18, 44, 71, and 99 mg kg -1 of Cu and 0.613, 0.631, 0.816, 0.918, and 0.955% Met + Cys. We allocated four replicate cages (four hens/cage) to each treatment group. Two eggs per plot were sampled to determine the chemical composition of albumen and yolk, based on natural and dry matter and on daily rates of deposition. An interaction effect of Met + Cys and Cu levels was observed for deposition rates of ash and Cu in the yolk, and the chemical composition of Ethereal Extract (EE) and ash in eggs, EE in albumen and Nitrogen, EE, and ash in the yolk. An isolated effect was observed for Met + Cys on egg chemical composition and on shell and yolk fractions, as well as on deposition rates of albumen N, EE, and ash, and yolk EE. The yolk cholesterol content increased by 18.17% with increasing Met + Cys in diets. In conclusion, the chemical composition of eggs varied with dietary Met + Cys and organic Cu concentrations. Dietary levels of Met + Cys determined the yolk cholesterol concentration in laying hens. ResumoO presente estudo teve como objetivo avaliar as possíveis interações dos níveis alimentares de metionina mais cistina (Met + Cys) e cobre orgânico (Cu) na composição química dos ovos, utilizando 320 galinhas Hy-Line Brown com 49 semanas de idade. As variáveis de composição e deposição foram avaliadas em arranjo fatorial 4 × 5, com níveis totais analisados de 18, 44, 71 e 99 mg kg-1 de Cu e 0,613, 0,631, Semina: Ciências Agrárias, Londrina, v. 41, n. 1, p. 269-282, jan./fev. 2020 Souza, J. C. S. M. et al.0,816, 0,918 e 0,955% de Met + Cys. Alocaram-se quatro gaiolas replicadas (quatro galinhas / gaiola) para cada grupo de tratamento. Foram amostrados dois ovos por parcela para determinar a composição química do albúmen e da gema, com base na matéria natural e seca e nas taxas diárias de deposição. Foi observado um efeito de interação dos níveis de Met + Cys e Cu para as taxas de deposição de cinzas e Cu na gema e composição química do Extrato Etéreo (EE) e cinzas nos ovos, EE no albume e nitrogênio, EE e cinzas na gema. gema. Um efeito isolado foi observado para Met + Cys na composição química dos ovos e nas frações de casca e gema, bem como nas taxas de deposição de N no albúmen, EE e cinzas e gema EE. O teor de colesterol na gema aumentou 18,17% com o aumento de Met + Cys nas dietas. A composição do ovo variou com as concentrações de Met + Cys e Cu orgânico. Os níveis alimentares de Met + Cys determinaram a concentração de colesterol na gema em galinhas poedeiras. Palavras-c...

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Section: Introductionmentioning

confidence: 99%