| Revista: | Revista brasileira de ciencia avicola |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000279277 |
| ISSN: | 1516-635X |
| Autores: | Casartelli, Elenice Maria1 Junqueira, Otto Mack Laurentiz, Antonio Carlos de Filardi, Rosemeire da Silva Lucas-Junior, Jorge de Araujo, L.F2 |
| Instituciones: | 1Universidade Estadual Paulista "Julio de Mesquita Filho", Departamento de Zootecnia, Jaboticabal, Sao Paulo. Brasil 2Serrana Nutricao Animal, Sao Paulo. Brasil |
| Año: | 2005 |
| Periodo: | Abr-Jun |
| Volumen: | 7 |
| Número: | 2 |
| Paginación: | 93-98 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Nota breve o noticia |
| Enfoque: | Experimental |
| Resumen en inglés | 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 |
| Disciplinas: | Medicina veterinaria y zootecnia |
| Palabras clave: | Aves de corral, Nutrición animal, Gallinas ponedoras, Dietas, Suplementación, Enzimas, Fitasa, Fósforo, Calidad, Huevos, Rendimiento |
| Keyword: | Veterinary medicine and animal husbandry, Animal nutrition, Poultry, Laying hens, Diets, Supplementation, Enzymes, Phytase, Phosphorus, Quality, Eggs, Yield |
| Texto completo: | Texto completo (Ver HTML) |
