Interpretive Summary: Standardized ileal digestibility of amino acids in canola meal fed to gestating and lactating sows
By: Anne Wallace
Canola meal (CM) is a common ingredient in pig feed that may have unfavorable effects on feed intake and digestibility. Anti-nutrients and the high dietary fiber content of CM are primarily responsible for this observed decrease in nutrient utilization.
More digestible CM varieties, or ways to counter anti-nutrients in CM are therefore needed. In this study published in the October 2019 issue of the Journal of Animal Science, researchers added a carbohydrase enzyme mixture to CM-based pigfeed to see how it affected the standard ileal digestibility (SID) of amino acids (AA) in CM of gestating and lactating sows.
Eight animals were fed one of four different diets, as follows: two diets had their AA sourced completely from CM, (1) with added carbohydrase enzyme mixture, and (2) without, (3) a casein-cornstarch diet, and (4) a phosphorus-free diet (the latter two diets were to determine endogenous, or internal, losses of nutrients). The (small intestinal) SID of AA was calculated to accurately determine digestibility.
Ileal digesta from the animals were analyzed at different intervals. It was determined that the SID of AA in CM was higher in lactating sows than in gestating sows. The addition of carbohydrase enzyme mixture increased the ileal digestibility of several AA during lactation, but not gestation.
Results indicated that overall, the addition of a carbohydrase enzyme mixture to a CM diet may increase the SID of AA in CM of lactating sows. Larger and more comprehensive studies may be warranted to reaffirm the findings of this study.