Abstract
A total of 1,170 pigs (PIC 337 × 1050; initial BW 56.3 lb) 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 standardized ileal digestible (SID) lysine requirement for these pigs; (2) a negative control diet formulated to provide 90% of the SID lysine requirement minus the expected nutrient release (both amino acids and dietary energy) 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. The diets were formulated such that the negative control diet containing the protease enzyme had calculated nutrient concentrations similar to the positive control. Pens of pigs were randomly allotted to 1 of 3 treatments with 26 pigs per pen and 15 replicates per treatment.
Highlights
With ever-increasing feed prices, the swine industry continues to search for alternatives to reduce feed cost and extract more nutrients from feed ingredients
A total of 1,170 pigs (PIC 337 × 1050; initial BW 56.3 lb) 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 standardized ileal digestible (SID) lysine requirement for these pigs; (2) a negative control diet formulated to provide 90% of the SID lysine requirement minus the expected nutrient release from the protease enzyme
Summary
With ever-increasing feed prices, the swine industry continues to search for alternatives to reduce feed cost and extract more nutrients from feed ingredients. Proteases are endogenous enzymes that are required for the digestion and utilization of dietary proteins. It has been suggested that supplemental protease enzymes can be added to diets to improve protein utilization. Preliminary results indicate that a new protease enzyme (CIBENZA DP100, Novus International, Inc., St. Charles, MO) may be able to increase digestibility of dietary protein and increase dietary energy utilization, eliciting improved growth performance. Research has been conducted with nursery pigs, none is available to verify this response in finishing pigs housed in commercial research facilities
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