Effect of phytase in laying hen diets with different phosphorus sources
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Data
2005-06-01
Autores
Casartelli, em [UNESP]
Junqueira, Otto Mack [UNESP]
Laurentiz, AC [UNESP]
Filardi, RS [UNESP]
Lucas Júnior, J [UNESP]
Araujo, LF
Título da Revista
ISSN da Revista
Título de Volume
Editor
Fundação APINCO de Ciência e Tecnologia Avícolas
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.
Descrição
Palavras-chave
Commercial laying hens, eggshell quality, phosphorus sources, phytase enzyme
Como citar
Revista Brasileira de Ciência Avícola. Fundação APINCO de Ciência e Tecnologia Avícolas, v. 7, n. 2, p. 93-98, 2005.