Results and Discussion
Calculated and analyzed values for CP and amino acid
content are shown in Table 2. Analyzed CP values for all
diets were in good agreement with the calculated
values. Analyzed levels of all supplemental amino acids
were all in close agreement with the calculated values.
The amino acid content in all diets was higher than the
NRC (1994) recommendation for essential amino acids.
Reduction of CP level in the diets had a significant
influence on the live performance of male broilers (Table
3; Fig. 1). As noted in the previous results from our
laboratory, a reduction in the dietary crude protein to levels lower than 22% resulted in a significant reduction performance when added to diets with 16 or 18% CP.