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Simple Summary: Deoxynivalenol is a secondary metabolite produced by fungal activity which has detrimental effects on nutrient digestibility and growth performance in pigs. These metabolites are found in the grain feeds such as barley, corn, and wheat, which are major ingredients in pig diets. To mitigate the negative effects of deoxynivalenol, clay products are often supplemented in pig diets. However, clay products potentially bind nutrients, including minerals and amino acids, consequently decreasing the digestibility of these essential nutrients. On the other hand, a preservative blend product containing antioxidants, microorganisms, vitamins, and amino acids was reported to restore the impaired growth performance by deoxynivalenol. In the present study, sodium digestibility was decreased by dietary deoxynivalenol but restored with the supplementation of the preservative blend product. Zinc digestibility was increased by dietary deoxynivalenol but decreased when bentonite was added to the deoxynivalenol-contaminated diet. The digestibility of some amino acids was decreased by supplemental bentonite. Overall, the addition of the preservation blend product improved some mineral digestibility whereas the addition of bentonite decreased the digestibility of some minerals and amino acids. The objectives were to determine the effects of dietary deoxynivalenol (DON) on apparent ileal digestibility (AID) of nutrients and to evaluate the efficacy of a bentonite (BEN) and a preservative blend (PB) product for alleviating DON effects on the nutrient digestibility of pigs. Twelve crossbred barrows with an initial body weight of 69.4 kg (standard deviation = 3.5) equipped with a T-cannula in the distal ileum were allotted a triplicated 4 × 2 incomplete Latin square design with four dietary treatments and two periods. Dietary treatments were (1) an uncontaminated diet, (2) a contaminated diet (CD) mainly based on contaminated wheat with 1.6 mg/kg DON, (3) CD + 0.25% PB consisting of preservation components as major sources, antioxidants, microorganisms, and amino acids (AA), and (4) CD + 0.25% BEN. The AID and ATTD of dry matter, organic matter, crude protein, most minerals, and most AA were not affected by DON contamination. Dietary DON decreased the AID and ATTD of sodium (p < 0.05) but were restored by supplementing the PB product (p < 0.05). The AID of zinc was increased (p < 0.05) by dietary DON, but supplementing BEN decreased zinc digestibility (p < 0.05). The AID of Arg, Ile, Thr, and Asp was decreased (p < 0.05) by BEN addition. In conclusion, dietary DON affected the digestibility of some minerals but not AA in pigs. Supplemental BEN can negatively affect the nutrient digestibility of some minerals and AA in pigs. The addition of a PB product in pig diets can restore digestibility of sodium but not of other nutrients. Based on these observations, feed additives for alleviating DON effects on nutrient digestibility of pigs can be carefully selected by swine diet formulators. [ABSTRACT FROM AUTHOR] |
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