Data/hora: 11/06/2024 12:15:31

Provedor de dados: 	89	
País: 	Brazil	
Título: 	Requirement of Digestible Methionine + Cystine to Molted Laying Hens	
Autores: 	Oliveira Filho,PA; Cruz,FGG; Rufino,JPF; Silva,EM; Viana Filho,GB; Silva,FM.	
Data: 	2019-01-01	
Ano: 	2019	
Palavras-chave: 	Amino acid; Egg quality; Hen; Performance; Serum.	
Resumo: 	ABSTRACT The present study aimed to determine the ideal requirement of digestible methionine + cystine to molted laying hens. The experimental period lasted 105 days, divided into five periods of 21 days. 144 Hisex White laying hens with 84 weeks-of-age were used. The experimental design was completely randomized with treatments constituted for six levels of digestible methionine + cystine (0.45, 0.50, 0.55, 0.60, 0.65, and 0.70%) in the diets, with four replicates of six birds each. Data collected were evaluated by polynomial regression at 5%. There was a significant effect (p&lt;0.05) of digestible methionine + cystine on feed intake, energy intake, protein intake, egg production, and egg mass. Internal egg quality presented positive linear effect (p&lt;0.05) on albumen height and yolk color. External egg quality was affected (p&lt;0.05) in eggshell %, eggshell thickness and eggshell resistance, where the level of 0.60% of digestible methionine + cystine in the diets provided eggshells with better quality (higher percentage, thicker and breaking resistance). Differences (p&lt;0.05) were also observed in glucose and triglycerides concentration, with 0.60% of digestible methionine + cystine in the diets presenting better equilibrium. Results of the present study suggested that higher levels of digestible methionine + cystine improved the performance and internal egg quality of molted laying hens. The level of 0.60% of digestible methionine + cystine provided better eggshell and equilibrium on blood biochemistry.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000400323	
Editor: 	Fundação APINCO de Ciência e Tecnologia Avícolas	
Relação: 	10.1590/1806-9061-2019-1076	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Poultry Science  v.21 n.4 2019	
Fonte: 	info:eu-repo/semantics/openAccess