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Authors: Hossain, Sajjad
Keywords: Phytase, cost-benefit analysis, serum P, bone quality
Issue Date: Mar-2021
Publisher: Chattogram Veterinary and Animal Sciences University Chattogram-4225, Bangladesh
Abstract: The experiment was performed to evaluate the effect of phytase super dosing on performance, tibia bone quality and serum biochemistry of broiler chicken. Ninety-six day-old chicks were distributed randomly into four treatment groups: D0, D1, D2, D3 with four replicates per treatment (6 chicks per replicate). The treatment consists of control diet (D0), control diet + 500 FTU phytase/kg (D1), control diet + 1500 FTU phytase/kg (D2) control diet + 2500 FTU phytase/kg (D3). These experimental diets were fed to the birds from d 13 to 28. Birds were offered a commercial starter diet from d 0 to 12. The different levels of phytase had no significant effect on BWG and FI. Birds fed the D1 and D2 diets showed better (P < 0.05) FCR than those on D0 and D3 diet. The concentration of serum P and TP was highest (P<0.05) in birds consumed the D2 diet than birds fed other diets. There was no significant effect of phytase level on serum Ca and GPT, GOT, and AP levels. The length and width of the tibia bone were increased (P < 0.05) in birds fed D1 and D2 diet compared to those on other diets. Birds on D2 diet showed increased (P < 0.05) level of Ca content in tibia bone. The weight of the heart was increased (P < 0.05) in birds fed D0 and D3. The drumstick weight was greater (P < 0.05) in birds consumed D1 and D2 diets than those on D0 and D3 diets. Bird fed D1 and D2 diets showed lower total feed and production cost and had better total profit/kg live bird and cost: benefit ratio. In conclusion, supplementing the diet with 500 and 1500 FTU phytase/kg improved the overall production performance of broiler chickens and consequently enhanced the economic profitability.
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