Artigo
Effect of phytase in laying hen diets with different phosphorus sources
Fecha
2005-06-01Registro en:
Revista Brasileira de Ciência Avícola. Fundação APINCO de Ciência e Tecnologia Avícolas, v. 7, n. 2, p. 93-98, 2005.
1516-635X
10.1590/S1516-635X2005000200005
S1516-635X2005000200005
S1516-635X2005000200005.pdf
3868629166600922
8942267939443572
9351275288031709
0000-0003-1271-6092
Autor
Universidade Estadual Paulista (Unesp)
Serrana Nutrição Animal
Resumen
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.