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Effects of a novel protease enzyme (CIBENZA) on finishing pig growth performance and carcass characteristics
A total of 1,170 pigs (PIC 337 × 1050; initial BW 25.5 kg) were used in a 131-d study to determine the effects of a protease enzyme on growth performance and carcass characteristics of finishing pigs. Dietary treatments consisted of: 1) a positive control diet formulated to provide 90% of the estimated standardized ileal digestible (SID) Lys requirement; 2) a negative control diet formulated to provide 90% of the SID Lys requirement minus the expected nutrient release (approximately 27 kcal/kg and 3.4% Lys) from the protease enzyme (CIBENZA DP100, Novus International, Inc., St. Charles, MO), and 3) the negative control diet with the addition of 0.05% CIBENZA DP100 (600,000 U protease/g). Pens of pigs were randomly allotted to 1 of the 3 treatments with 26 pigs per pen and 15 replicates per treatment. Pigs were harvested (average final BW of 132 kg) at a commercial facility. Overall (d 0 to 131), pigs fed the positive control diet had an increased (P < 0.05) ADG of 0.02 kg compared to pigs fed the negative control diet. Pigs fed the negative control diet plus CIBENZA DP100 had increased (P < 0.05) ADFI (2.7%) and a tendency for improved (P = 0.09) ADG (1.8%) compared to pigs fed the negative control diet without the enzyme. No differences were observed in ADG, ADFI, or G/F between pigs fed the positive control and those fed the negative control plus the protease enzyme, which suggests that the release values attributed to the enzyme were accurate. The only observed effect on carcass characteristics was for yield, in which the pigs fed the negative control diet with enzyme had a lower (P < 0.05) carcass yield (0.9 percentage units) compared to pigs fed the negative control diet without enzyme. These data suggest that the protease enzyme CIBENZA DP100 will elicit improved growth performance when added to diets formulated at 90% of the pig’s estimated SID lysine requirement.
Keywords: finishing pigs, growth, protease enzyme
Item |
Positive Control |
Negative +DP100 |
Negative Control |
SEM |
||
d 131, kg |
133.3a |
132.6ab |
130.2b |
1.253 |
||
ADG, kg |
0.831a |
0.826abx |
0.811by |
0.006 |
||
ADFI, kg |
2.184ab |
2.207a |
2.148b |
0.021 |
||
G:F |
0.381 |
0.375 |
0.378 |
0.003 |
||
HCW, kg |
98.4 |
97.4 |
96.8 |
0.903 |
||
Yield, % |
73.8ab |
73.5a |
74.4b |
0.262 |
||
|
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a,bSuperscripts differ, P < 0.05. x,ySuperscripts differ, P < 0.10