Date of Award
Master of Science - Agriculture
John Michael Mehaffey
The objective of this study was to evaluate performance parameters and meat yield of commercial broiler chickens fed diets with different amino acid concentrations, with or without chromium supplementation, and delivered through two different feeding programs over 54 days. The experimental study was completed as a randomized-block design with 4,800, Ross 708 X Ross 708 commercial broiler chickens, picked at random, and evenly divided into six treatment groups (800 birds per group). Treatments 1 and 4 where placed under feeding program (FP1). Treatments 2, 3, 5, and 6 where placed under a different feeding program (FP2). Three different feed formulations were used, treatments 1 and 4 received formulation (A), treatments 2 and 5 received formulation (B), and treatments 3 and 6 received formulation (C). The treatments 1, 2, and 3 did not receive chromium (NC), while treatments 4, 5, and 6 did receive chromium (C). These birds were reared in 96, 5’X10’ (50 ft2) floor pens, at a stocking density of 1.00 ft2/bird (50 birds per pen). Throughout the duration of the trial bird performance was measured.
Average body weight, feed conversion ratio, feed consumed, and percent mortality was collected at the change of each feed phase. From the results of this study there was no significant effect on broiler performance from the supplementation of chromium, feed formulation, and feeding program. Although, the results on Table 14 from the yield study shows that treatment 2 was significantly different from treatments 1, 3, and 4 in front half carcass weight, however, was not significantly different from treatments 5 and 6. Table 14 results also show treatment 2 having significant differences from treatments 1 and 4 in breast meat yield, however was not significantly different from treatments 3, 5, and 6. However, there is a possibility that these areas of significance in the yield study could be false positives found in the data of this single trial. Additional studies should be conducted to further the assumption if there is an actual significant difference between the treatments.
Brock, Ian, "The Effects Of Different Amino Acid Concentrations, With Or Without Chromium Supplementation, On The Performance And Yield Of Commercial Broiler Chickens Fed Two Different Feeding Programs." (2020). Electronic Theses and Dissertations. 288.
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