Effect of phytase in broiler nutrition on performances and tibia strenght
2006
Zivkov-Balos, M. | Mihaljev, Z. | Lukic, M. | Kovacevic, M. | Orlic, D.
The effect of microbial phytase in corn/soybean meal diets for broilers on performances and tibia characteristics were investigated. The trial was carried out on 200 Arbor Acres broilers of both sexes divided into four groups. The broilers were fed with complete mixtures with different levels of P (0.80 and 0.57% total P and 0.46 and 0.25% available P) with or without phytase. Reduction of the dietary total and available P levels for experimental broilers induced lower body mass and gain as well as higher feed conversion. However, by introduction phytase into diets negative effects of phosphorus reduction were, to some extent alleviated. Addition of phytase into diets decreased serum Ca and increased serum P. Reduction of the dietary P level had no significant effect on serum Ca, but had significant negative effect on serum P. The obtained results of bone analysis show that phytase was effective in increasing investigated parameters, but no significant differences were found among groups.
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