Wheat DDGS Feed Guide - Western Canadian Feed Innovation ...

Wheat DDGS In Swine Diets
Ethanol co-products such as wheat DDGS can be included in swine diets. Under current pricing scenarios,
wheat DDGS is cost effective and can be included in mash diets. Wheat DDGS of good quality can be included
up to 10% in a weaner/nursery diet and up to 20% in a grower or finisher diet.
Wheat DDGS contains more non-starch polysaccharide (NSP) than wheat grain. The NSP content of wheat
DDGS is also slightly higher than in corn DDGS. Within the NSP, the content of xylose and arabinose sugar is
increased, indicating that the content of arabinoxylans is substantially higher in wheat DDGS than in the parent
wheat. Wheat DDGS contains more xylose than corn DDGS (Table 11) but has similar arabinose content. These
data indicate that the ratio of arabinose to xylose in the arabinoxylans in wheat DDGS is different than in corn
DDGS.
ENERGy DIGESTIBILITy AND CONTENT
Increased wheat NSP is related to reduced energy digestibility for swine (Zijlstra et al. 1999). Estimations of
energy digestibility and energy content differ substantially among studies, depending on study design, wheat
DDGS inclusion level, feedstock quality and fermentation, and drying technologies used in the manufacturing
process. Widyaratne and Zijlstra (2008) reported apparent total tract energy digestibility of 68.3% and 67.1%
for wheat DDGS and a 4:1 mixture of wheat:corn DDGS when each replaced 40% wheat in the diet. Nyachoti
et al. (2005) also replaced 40% of the wheat in the basal diet with wheat DDGS from two different lots and
reported total digestibility of energy as 65% and 68% as compared to wheat at 86%. The diets in the studies of
Widyaratne and Zijlstra (2007) and Nyachoti et al. (2005) were not balanced for energy or amino acid content.
The impact of fibre-degrading enzymes on digestibility of wheat DDGS is not clear. The addition of a commercial
xylanase to a diet containing 40% wheat DDGS did not improve total tract energy digestibility (Widyaratne et al.,
2009). Thacker (2009) incorporated 20% of wheat DDGS into diets for growing pigs and reported the total tract
digestibility of dietary energy was 76.5% with no improvement with the addition of a xylanase and ß-glucanase
cocktail (76.7%). Some ethanol plants add fibre-degrading enzymes during the production process, making a
positive enzyme effect on DDGS less likely.
25
SWINE DIETS