Interpretive Summary: Xylanase, and the role of digestibility and hindgut fermentation in pigs on energetic differences among high and low energy corn samples
By: Dr. John Patience
Corn is the leading energy source in U.S. swine diets, but its energetic value may vary depending on growing conditions. Researchers from Iowa State University investigated the fermentability and digestibility of high and low energy corn sources in growing pigs, and the impact of supplementing xylanase. Their findings suggest energetic differences among corn sources are driven by their ability to be fermented in the hindgut, rather than their digestibility in the small intestine; this is a novel and unexpected finding. Higher energy corn sources in their study had 22% less dietary fiber, yet the fermentability of energy and fiber was approximately 55 and 50% greater than the lower energy corn sources. The benefit of adding xylanase enzyme was equal across the corn samples; in other words, the enzyme was equally effective in both the low and the high energy corn samples.
To view the full article, visit the Journal of Animal Science.