Nutritional value of distillers dried grains with solubles from corn and sorghum and xylanase in diets for pigs

ABSTRACT Two experiments were conducted to evaluate the digestibility and energy of distillers dried grains with solubles (DDGS) from corn and sorghum with or without xylanase enzyme in diets for pigs. The values of dry matter (DM), organic matter (OM), crude protein (CP), mineral matter (MM), ether extract (EE), neutral detergent fiber (NDF), gross (GE), digestible (DE), metabolizable energy (ME), and digestibility coefficients (DC) were determined. In the experiment 1, we used eight barrows of 26.15±3.45 kg with repeated measures in three periods of five days of collection. The treatments consisted of a reference diet (RD); RD with 200 g kg−1 corn DDGS or sorghum DDGS; and RD with 400 g kg−1 corn DDGS or sorghum DDGS. Corn DDGS showed higher values of DE, ME, and DC of EE, GE, and CP. Inclusions of 400 g kg−1 of the test ingredients resulted in higher values of DE and ME and trend for higher DC of DM, OM, and CP. In experiment 2, nine barrows weighing 34.91±1.46 kg were fed RD, 200 g kg−1 corn DDGS or 200 g kg−1 corn DDGS plus xylanase enzyme. The inclusion of xylanase did not influence the digestibility and energy values in diets containing corn DDGS. Values of DE and ME of corn DDGS were 3,477 and 3,277 kcal kg−1, respectively, for the substitution of 200 g kg−1 and 3,761 and 3,068 kcal kg−1 for the substitution of 400 g kg−1 RD. For sorghum DDGS, DE and ME values were 3,030 and 2,863 kcal kg−1, respectively, for replacement of 200 g kg−1 and 3,398 and 3,296 kcal kg−1 for substitution of 400 g kg−1 RD. Levels of up to 400 g kg−1 do not influence the DE and ME of the diets but impair the digestibility coefficient of DM, OM, CP, EE, MM, and NDF. The use of xylanase enzyme in diets containing 200 g kg−1 of corn DDGS does not affect the digestibility of the diets.