Effect of Phytase Supplementation on Performance Tibia Ash and Serum P in Broilers Fed Diets with Different Levels of Phosphorus

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Gürbüz, Y., Cetin, M. and Sengul, T. 2009. Effect of phytase supplementation on performance, tibia ash and serum P in broilers fed diets with different levels of phosphorus. J. Appl. Anim. Res., 36: 137–140. In order to determine the optimal concentration of phytase and available phosphorus (aP) supplementation in broiler diets; 0.13%, 0.26% and 0.40% aP contents, each supplemented with 400, 800 and 1200 IU/kg phytase respectively, were tested against a control diet of 0.49% aP with no enzyme addition. Birds performed significantly better with control diet with sufficient phosphors concentration. The diet of 0.13% available aP with 400 IU/kg enzyme concentration (A) had lowest serum phosphorus level and tibia ash content in broiler chicken. No remarkable difference, available was observed in feed utilization efficiency among the experimental diets. However, costly aP could be saved by feeding it at the lowest level with highest level of phosphatase.