This study was to determine the effect of a protease (CIBENZA® EP150) on performance and carcass yield of broilers fed different levels of protein. The maximum use of the protein source in accordance of the utilization (digestibility) of the animals, allowing cost reduction per kilogram of chicken produced.
Materials and Methods
5,088 day old chicks were alotted to 48 pens in a randomized block design. The treatments were:
1) Low protein and amino acids (95% of commercial levels)
2) Low protein and amino acids + CIBENZA® EP150
3) Average protein and amino acid (100% of commercial levels)
4) Average protein and amino acid + CIBENZA® EP150.
5) High protein and amino acid (105% of commercial levels)
6) High protein and amino acids + CIBENZA® EP150.
CIBENZA® EP150, an intrinsic protease produced from the Bacillus licheniformis PWD-1 strain, was added at a rate of 300,000 units of activity/kg feed. Animals were fed a pelleted four-phase diet. Performance and carcass yield were evaluated and the results were submitted for analysis of variance (GLM ANOVA) and subsequently to Tukey test (P<0.05).
Results and Discussion:
According to Figure 1, CIBENZA® EP150 was effective in recovering the fraction of performance lostdue to a 10 percent drop in protein and amino acids in the diet.