Effects of Supplemental Enzymes in Diets Containing Distillers Dried Grains with Solubles on Finishing Pig Growth Performance

Abstract

Four experiments involving 4,506 pigs were conducted to determine the effects of different commercial enzymes on the growth performance of growing-finishing pigs fed distillers dried grains with solubles (DDGS). All experiments were conducted in the same commercial swine research facility. Experiments 1 and 2 used corn- and soybean meal-based diets with 15% DDGS. A β-mannanase enzyme was used in Exp. 1, and a blend of enzymes that contained β-glucanase, cellulase, and protease activities was used in Exp. 2. There were no differences (P>0.10) in ADG, ADFI, and G:F between pigs fed diets with added enzyme and pigs fed diets without enzyme in either experiment (ADG 1.00 vs. 1.01 kg/d, and G:F 0.408 vs. 0.408; ADG 0.94 vs. 0.94 kg/d, and G:F 0.424 vs. 0.421, in Exp. 1 and 2, respectively) In Exp. 3, diets containing 45 and 60% DDGS were fed with or without 2 commercial proprietary enzyme products designed for use in diets containing DDGS. Average daily gain (0.85 vs. 0.86 kg/d) and G:F (0.370 vs. 0.373) were not different (P>0.10) among treatments. In Exp. 4, an enzyme product with bacterial endo-1,4-β-xylanase was evaluated in diets containing 30% DDGS. Average daily gain (0.82 vs. 0.82 kg/d) and G:F (0.391 vs. 0.387) were not different (P>0.10) among treatments. Based on the results, the different enzymes evaluated in these experiments did not enhance finishing pig growth performance when diets contained varying levels of DDGS.