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| Casartelli,EM; Junqueira,OM; Laurentiz,AC; Filardi,RS; Lucas Júnior,J; Araujo,LF. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Commercial laying hens; Eggshell quality; Phosphorus sources; Phytase enzyme. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000200005 |
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| Junqueira, Otto Mack; FCAV UNESP Jaboticabal; Duarte, Karina Ferreira; FCAV UNESP Jaboticabal; Assuena, Vinícius; FCAV UNESP Jaboticabal; Filardi, Rosemeire da Silva; FEIS UNESP Ilha Solteira; Laurentiz, Antonio Carlos de; FEIS UNESP Ilha Solteira; Praes, Maria Fernanda Ferreira Menegucci; FCAV UNESP Jaboticabal. |
| An experiment was conducted to evaluate the performance, bone densitometry and carcass yield of broilers chicks, using different levels of phytase enzyme. Nine hundred and sixty male one-day-old broiler chicks were used. The birds were distributed in a completely randomized experimental design, involving five treatments and six replications of 32 chicks each. The treatments consisted of a control diet for each phase, and four other diets were formulated adding growing levels of the phytase enzyme (250, 500, 750 and 1,000 FTU of phytase kg-1 feed). When adding the phytase enzyme, the nutritional matrix was valued to guarantee the same nutritional levels as the control diet. In general, the addition of phytase enzyme determined a linear decrease on the... |
| Tipo: Pesquisa de campo |
Palavras-chave: 5.04.03.00-1 bone characteristics; Carcass yield; Performance; Phytase enzyme bone characteristics; Carcass yield; Performance; Phytase enzyme. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/10702 |
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