Data/hora: 11/06/2024 07:20:40

Provedor de dados: 	89	
País: 	Brazil	
Título: 	Effect of phytase in laying hen diets with different phosphorus sources	
Autores: 	Casartelli,EM; Junqueira,OM; Laurentiz,AC; Filardi,RS; Lucas Júnior,J; Araujo,LF.	
Data: 	2005-06-01	
Ano: 	2005	
Palavras-chave: 	Commercial laying hens; Eggshell quality; Phosphorus sources; Phytase enzyme.	
Resumo: 	An experiment was conducted to evaluate the effects of the enzyme phytase in diets formulated with different phosphorus sources on performance, eggshell quality and excretion of commercial laying hens. Two hundred and eighty-eight commercial Hyssex Brown laying hens were evaluated during two production phases, which included eight twenty-eight-day cycles, using a completely randomized design in a 3x2 factorial with six replicates of eight birds per treatment. Three phosphorus sources (calcium and sodium phosphate, micro-granulated dicalcium phosphate and triple super phosphate) and two phytase levels (0 or 1000 FTU/kg diet) were tested in the composition of the diets. After the post-peak period, triple super phosphate decreased bird performance and eggshell quality. It was possible to reduce the levels of phosphorus supplementation when phytase was added to the diet. Besides, phytase supplementation reduced phosphorus, calcium and nitrogen excretions, but affected mean egg weight at production peak.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000200005	
Editor: 	Fundação APINCO de Ciência e Tecnologia Avícolas	
Relação: 	10.1590/S1516-635X2005000200005	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Poultry Science  v.7 n.2 2005	
Fonte: 	info:eu-repo/semantics/openAccess