Xylanase increased the ileal digestibility of nonstarch polysaccharides and concentration of low molecular weight nondigestible @entity3363 in XXXX fed high levels of @entity3505 distillers dried grains with solubles.

@entity6122 @entity6213 @entity1707 @entity13275 @entity4628 @entity4583 @entity413 @entity376 @entity3505 @entity3363
UNASSIGNED: The objective was to study the effect of a commercially available xylanase (CAX), an experimental xylanase (EX), and EX in combination with protease (EXP) on the degradation of nondigestible @entity3363 (NDC) and @entity4628 ( @entity4628 ) of nutrients in @entity3505 distillers dried grains with solubles (wDDGS). The control and 3 enzyme diets contained 96% wDDGS supplemented with vitamins, minerals, @entity376 , and @entity6213 as a digestibility marker in addition to enzyme premix. Eight ileal cannulated @entity1707 were fed 4 experimental diets containing 96% wDDGS-a control diet or 1 of 3 diets with CAX, EX, or EXP-in a double 4 * 4 Latin square design. The experimental period lasted 7 d; adaptation lasted 4 d, and the ileal digesta were collected for 8 h on d 5 and 7, when spot samples of feces were also collected. Digesta samples were analyzed for NDC, total and soluble nonstarch polysaccharides (NSP), low molecular weight (LMW) NDC, OM, CP, fat, starch, and marker. Compared with the control diet, addition of CAX, EX, and EXP increased the @entity4628 of arabinoxylan by 32 ( < 0.001), 28 ( = 0.001), and 24% ( = 0.004), respectively. In addition, EXP increased the @entity4628 of noncellulosic polysaccharide @entity413 by 21% compared with the control ( = 0.005). Compared with the control, addition of EX, EXP, and CAX decreased the concentration of soluble arabinoxylan in ileal digesta by 40 ( < 0.0001), 40 ( < 0.0001), and 21% ( = 0.022), respectively. Furthermore, addition of CAX, EXP, and EX increased the concentration of LMW arabinoxylan in ileal digesta by 40 ( = 0.0001), 36 ( = 0.0006), and 24% ( = 0.023), respectively, compared with the control. Addition of EX and EXP decreased the concentration of soluble NSP of ileal digesta by 25 ( = 0.001) and 26% ( < 0.001), respectively, compared with the control diet. Addition of CAX ( < 0.0001) and EXP ( = 0.013) increased the @entity4583 -to- @entity6122 ratio in the insoluble arabinoxylan fraction in ileal digesta compared with the control diet, and CAX increased the @entity13275 -to-xylose ratio of the ileal insoluble NSP fraction ( < 0.0001) compared with the control diet. Enzyme addition did not affect @entity4628 of OM, CP, starch, and fat ( > 0.3). In conclusion, addition of xylanases to wDDGS diets increased the ileal digestibility of NSP and generated LMW NDC components in the small intestine of @entity1707 but did not affect ileal digestibility of nutrients in the current study.
