Data/hora: 06/06/2024 04:40:46

Provedor de dados: 	96	
País: 	Brazil	
Título: 	Different trace mineral sources and recommendations in the performance and quality of eggs from Dekalb White layers	
Autores: 	Pereira,Gabrielle Catarine Castro; Costa,Fernando Guilherme Perazzo; Silva,José Humberto Vilar da; Pascoal,Leonardo Augusto Fonseca; Lima,Cristina Aparecida Barbosa de; Bittencourt,Letícia Cardoso; Sechinato,Alexandre da Silva; Hermes,Rafael Gustavo.	
Data: 	2018-01-01	
Ano: 	2018	
Palavras-chave: 	Albumen; Carbo-amino-phospho-chelates; Egg shell; Trace minerals; Shelf life.	
Resumo: 	ABSTRACT This work aimed to evaluate the performance and egg quality of lightweight laying hens supplemented with a high biological value mineral, carbo-amino-phospho-chelates (CAPC), compared with inorganic minerals (sulfates), at different recommended values. A total of 320 Dekalb White hens, between 53 and 77 weeks of age, were distributed in a completely randomized design into two treatments, 10 replicates of 16 birds each. The treatments consisted of a reference diet formulated according to breed manual recommendations, in which one group was supplemented with a trace mineral source, CAPC (Cu, 8.6; Fe, 43.7; Mn, 56.4; Se, 0.34; and Zn, 43.7 mg/kg) and the other with a sulfate source, using the levels recommended in the breed manual (Cu, 8; Fe, 60; Mn, 70; Se, 0.25; and Zn, 60 mg/kg). There was no effect of trace mineral supplementation on egg production variables, feed conversion ratio by mass or by dozen eggs, and eggs per housed bird. However, there was an increase in feed intake and weight and mass of eggs when birds fed diet supplemented with CAPC. Regarding egg quality, CAPC supplementation increased the albumen weight and percentage, shell weight, thickness, and strength, and Haugh unit. The eggs from birds fed CAPC supplementation showed higher levels of iron and zinc when compared with eggs from birds fed the sulfate source diet. Better quality rates were observed in variables related to shelf life for the group that received CAPC. Trace mineral sources and recommendations in the diets of high genetic potential laying hens need to be reassessed and allow us to conclude that totally replacing the sulfate for different recommendations of CAPC in laying hen diets helps to improve quality characteristics as well as the nutritional value of eggs.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100523	
Editor: 	Sociedade Brasileira de Zootecnia	
Relação: 	10.1590/rbz4720170235	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Zootecnia  v.47 2018	
Fonte: 	info:eu-repo/semantics/openAccess