E. McGill
Division of Animal Sciences, University of Missouri-Columbia, Columbia, Missouri 65211, USA
A. Kamyab
Division of Animal Sciences, University of Missouri-Columbia, Columbia, Missouri 65211, USA
J.D. Firman
Division of Animal Sciences, University of Missouri-Columbia, Columbia, Missouri 65211, USA
ABSTRACT
Two experiments were conducted with the objective of testing the effects of feeding a 15% CP diet with crystalline amino acid supplementation on the performance of broilers from 0-3 weeks of age. In both experiments, commercial broilers were fed a diet formulated to meet NRC requirements for the first seven days. The diet contained 23% CP and 3200 kcal/kg ME and also served as the Positive Control diet (PC). On day 7, birds were sorted by weight into battery pens with 5 birds per pen. Both experiments utilized the same six dietary treatments with eight replicates per treatment for a total of 48 pens. The remaining treatments consisted of: a 15% CP negative control diet with crystalline amino acids added back to meet required levels (NC), a NC diet + 0.1% cystine (NC + C), a NC diet + 0.1% threonine (NC + T), a NC diet + 0.1% glycine (NC + G) and a NC diet + 0.1% cystine, threonine and glycine (NC + C,T,G). Glutamic acid was added to all diets to maintain a 20% protein equivalent. All diets were formulated on a digestible basis and were designed to be isocaloric. At the conclusion of the experiments, Body Weight Gain (BWG), Feed Intake (FI) and Feed:Gain (F:G) were measured. In Experiment 1, significant differences (p<0.05) were found in BWG between the PC treatment and PC + C,T,G, although no significant differences in FI or F:G were observed. There were no significant differences (p>0.05) in BWG, FI, or F:G among any of the other treatments. In Experiment 2, treatments had no effect (p>0.05) on performance. Overall, these results suggest that feeding a 15% CP diet + crystalline amino acids to broilers in the starter period can yield similar performance to a 23% CP diet.
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How to cite this article
E. McGill, A. Kamyab and J.D. Firman, 2012. Low Crude Protein Corn and Soybean Meal Diets with Amino Acid Supplementation
for Broilers in the Starter Period 1. Effects of Feeding 15% Crude Protein. International Journal of Poultry Science, 11: 161-165.
DOI: 10.3923/ijps.2012.161.165
URL: https://scialert.net/abstract/?doi=ijps.2012.161.165
DOI: 10.3923/ijps.2012.161.165
URL: https://scialert.net/abstract/?doi=ijps.2012.161.165
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