Effect of dietary phytase suplementation on the performance, bone densitometry, and phosphorus and nitrogen excretion of broilers
Carregando...
Data
2009-03-01
Autores
Assuena, V [UNESP]
Junqueira, Otto Mack [UNESP]
Duarte, KF [UNESP]
Laurentiz, AC [UNESP]
Filardi, RS [UNESP]
Sgavioli, S [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Fundação APINCO de Ciência e Tecnologia Avícolas
Resumo
This experiment was carried out to evaluate the effects of the inclusion of different levels of phytase on broiler performance, bone densitometry, and phosphorus and nitrogen excretion. Nine hundred and sixty one-day old broilers, 50% males and 50% females, were distributed in a completely randomized experimental design into five treatments and six replicates 32 birds each. The treatments consisted of a control diet and four diets with the addition 25, 50, 75, and 100 g/ ton of phytase (250, 500, 750 and 1000 FTU of phytase/kg fed). Diets were formulated to contain equal nutritional levels, and considered the phytase product nutritional levels. In general, the addition of phytase resulted in a linear decrease in broiler performance. However, the performance results obtained with the level of 250 FTU phytase/kg feed were not different from the control treatment. The best bone density results were observed in the control treatment, with no phytase. The results of this experiment indicate that the nutritional matrix of the phytase product needs to be reviewed when added in levels higher 250 FTU/kg to broiler diets.
Descrição
Palavras-chave
Bone mineralization, feed conversion ratio, feed intake, weight gain
Como citar
Revista Brasileira de Ciência Avícola. Fundação APINCO de Ciência e Tecnologia Avícolas, v. 11, n. 1, p. 25-30, 2009.