Abstract
ABSTRACT This study investigated the effects of adding a multi-enzyme cocktail (MC) to a distillers dried grains with solubles (DDGS)-containing diet on energy and nutrient coefficients of apparent ileal (CAID) and total tract (CATTD) digestibility, digesta volatile fatty acids (VFA) concentration, and gut bacterial profile using ileal-cannulated barrows (n = 9; 62.7 ± 6.4 Kg initial body weight). Three isocaloric/isonitrogenous diets based on corn and soybean meal with 0 (control) or 30% DDGS (DDGS diet) and DDGS diet supplemented with MC (DDGS + MC) were used. The 3 diets were fed to pigs in a 2-period change over design to obtain 6 observations per diet. A casein–cornstarch-based diet was used in a separate period to determine basal endogenous N and AA losses to estimate standardized ileal digestibility (SID) of AA. All diets contained titanium dioxide as a digestibility marker. Ileal digesta and feces were used for VFA and bacterial profile determination, respectively. The CAID for DM, N, starch, and energy were greater (P 0.10). The DDGS diet also decreased (P 0.10) for N and NDF. However, diet had no effect (P > 0.10) on hindgut nutrient disappearance. Diet did not influence (P > 0.10) digesta pH and VFA concentrations except for isovalerate concentration, which was greatest (P 0.10) by diet. In conclusion, adding MC to the DDGS diet improved the digestibility of DM, starch, most AA, but not NDF and N digestibility. The results show that addition of MC to the DDGS diet stimulated the growth of intestinal bacteria with xylanolytic and cellulolytic activities.
Published Version
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