Modulating the Growth Curve in Broiler Chicken through Varying Balanced Protein Regimen (All Step-up, Designed to Get Compensatory Responses)
نویسندگان
چکیده
Background: Compensatory growth is a well-established characteristic even in broiler chicken having very short grow-out cycle. Feeding manipulations that take advantages of compensatory after period nutrient restriction might be beneficial to poultry industry. Methods: In total, 1400 one-day-old straight run chicks (Hubbard) were allocated 8 experimental treatments, replicated 7 times with 25 each, completely randomized design. The 3 isocaloric corn soybean meal diets; high BP (HBP) 1.2% standardized ileal digestible lysine (SID Lys), medium (MBP) 1.1% SID Lys and low (LBP) 1.0% Lys, offered starter, grower finisher phases, as HML (conventional) LHH, MHH, LMM, MMH, LLM, LLH LMH all steps-up. Result: Greater (P less than 0.05) BW BWG observed groups during phases. MMH group had greater FI better FCR starter LMM heavier abdominal fat pad, whereas, MHH dressed carcass, breast meat, drumstick thigh yield. groups, similarly, higher spleen, thymus, bursa weights, antibody titers against NDV IBDV total protein concentration. blood glucose, urea cholesterol concentrations. It is, therefore, recommended HBP (1.2% Lys) should gradually step down LBP (1.10% for efficient sustainable production chicken.
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ژورنال
عنوان ژورنال: Indian Journal of Animal Research
سال: 2023
ISSN: ['0367-6722', '0976-0555']
DOI: https://doi.org/10.18805/ijar.bf-1583