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چکیده
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A total of 720 one-day-old Arian broiler chicks were used to determination of effects of different feed formulation patterns on productive and serum biological responses. These birds were randomly allocated to 4 group with 6 replicates containing 30 bird (15 males + 15 females). Measurements were subjected to analysis of variance for completely randomized 2×2 factorial design that including 2 dietary energy expression patterns (Apparent (AMEn) and true (TMEn) metabolizable energy corrected to nitrogen equilibrium) and 2 amino acid requirement patterns (Total (TAA) and digestible (DAA)). Productive parameters (body weight (BW), live weight gain(LWG), feed intake (FI) and feed conversion ratio (FCR)) were determined via weekly weighing and serum biological parameters (amylase, lipase and protease activity and glucose, triglyceride and total protein of serum) were measured by standard kit. The results showed that formulation diets based on TMEn and DAA pattern increased BW, BWG and FI so decreased FCR (P˂0.05). Amylase activity, glucose and total protein were decreased by use of AMEn and TAA pattern, however lipase activity and triglyceride were increased by these patterns (P˂0.05). It is suggested that to improve physiological and productive responses of broiler chicks use the TMEn and DAA patterns to diet formulation.
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