Influence of dietary amino acid density, crude protein level, and feed scheduling on performance and carcass traits of Ross 708 female broilers slaughtered between 1.9 and 2.0 kg

Abstract

SUMMARY: Adjustments in dietary amino acid density, CP levels, and feed scheduling influence broiler performance, carcass traits, and integrator profitability. Therefore, 2 experiments were conducted to assess the former factors on the live performance and carcass traits of female Ross 708 broilers grown for a high-value bone-in market (36 d processing). Experiment 1 evaluated 4 amino acid densities while Experiment 2 was arranged as a 2 × 2 factorial evaluating dietary CP and feed scheduling. Amino acid density in Experiment 1 had no effect on any performance or processing parameter except feed conversion which was decreased for birds fed the Medium diet. The lack of substantial improvement in live performance resulted in increased feed, live BW, and carcass costs per kg. Neither feed scheduling nor dietary CP had an effect on live performance in Experiment 2. However, feeding low CP diets resulted in increased total breast meat yield, whereas increasing the number of feeding phases decreased total breast meat yield. In conclusion, dietary alterations in amino acid density in female broiler broilers warrants further attention.

Keywords

• amino acid density
• low crude protein
• feeding phase
• performance
• female