Efficacy of microbial phytase at different levels on growth performance and mineral availability in broiler chicken
2009
Khan, S.M.Z.U. (University of Veterinary and Animal Sciences, Lahore (Pakistan). Dept. of Food and Nutrition) | Jabbar, M.A. (University of Veterinary and Animal Sciences, Lahore (Pakistan). Dept. of Food and Nutrition) | Ijaz, M. (University of Veterinary and Animal Sciences, Lahore (Pakistan). Dept. of Clinical Medicine and Surgery) | Qadeer, M.A. (University of Veterinary and Animal Sciences, Lahore (Pakistan). Dept. of Food and Nutrition)
A 4-week feeding trial with 120 day-old broiler (Hubbard) chicks was conducted to determine the efficacy of microbial phytase (Natuphos) at different levels on growth performance and mineral availability in broiler chicks fed a low (0.35%), Phosphorus (P) diet. Four levels of microbial phytase (0, 250, 500 and 750 U/kg diet) were added to diets containing M.E. 3000 Kcal/kg and CP 21%. Phytase supplementation increased (P less than 0.05) body weight, feed intake, FCR and dressing percentage at 28 day. Supplementation of phytase @ 500 U/kg diet to the low phosphorous diet significantly (P less than 0.05) improved toe ash percentage. Microbial phytase improved (P less than 0.05) apparent availability of P, Ca, and Mg. Supplementation of phytase @ 250 U/kg diet was the most economical as cost/kg live weight was lesser than 500 and 750 phytase U/kg diet supplementation. The results showed that microbial phytase supplementation to a low-P diet improved growth performance and apparent mineral availability in broiler chickens.
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