Abstract
A total of 36 pigs (PIC 337 × 1050; initially 185 lb BW) were used in a 14-d study to evaluate the effects of xylanase (Porzyme 9302; Danisco Animal Nutrition, St. Louis, MO) in growing-finishing diets varying in dietary fiber on nutrient digestibility. Pigs were randomly allotted to 1 of 6 dietary treatments in a 2 × 3 factorial. Main effects were increasing dried distillers grains with solubles (DDGS; 35, 42.5, and 50%) with or without xylanase (0 or 4,000 units xylanase per kilogram of diet. The 6 treatment diets were corn-soybean meal–based with 15% added wheat middlings (midds), with 6 replications per treatment. All diets were fed in meal form. Multiple enzyme × DDGS interactive effects (P < 0.05) were observed for digestibility of various nutrients. The majority of these interactions resulted from differences in response to increasing DDGS with and without xylanase. In diets with xylanase, apparent digestibility generally decreased as DDGS increased. In diets without xylanase, apparent digestibility decreased as DDGS increased from 35 to 42.5% but increased in diets containing 50% DDGS. Overall, despite the interactions, increasing DDGS regardless of enzyme inclusion lowered (quadratic, P < 0.01) apparent fecal digestibility of DM, GE, ADF, NDF, and zinc as well as fecal digestibility (linear, P < 0.02) of fat, Ca, and P. Despite the interactions, adding dietary xylanase did not improve digestibility in corn-soybean meal–based diets containing fibrous co-products.; Swine Day, Manhattan, KS, November 15, 2012
Highlights
Feed ingredients such as wheat midds and DDGS are often used as alternatives to corn and soybean meal in swine diets
A total of 36 pigs (PIC 337 × 1050; initially 185 lb BW) were used in a 14-d study to evaluate the effects of xylanase
MO) in growing-finishing diets varying in dietary fiber on nutrient digestibility
Summary
Feed ingredients such as wheat midds and DDGS are often used as alternatives to corn and soybean meal in swine diets. The remaining components of the kernel, such as fiber, increase in concentration, which causes most grain co-products to be low in dietary energy. Both DDGS and midds have higher crude fiber content than corn and contain more arabinoxylans. Arabinoxylans are hydrophilic non-starch polysaccharides (NSP) found in grain as minor constituents in the cell wall that act as anti-nutritional factors. Swine do not digest NSP efficiently due to their lack of fiber-specific digestive enzymes; enzymes like xylanase are viable solutions to increase nutrient availability
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Kansas Agricultural Experiment Station Research Reports
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
