Evaluation of different levels of exogenous hydrophilic emulsifier supplementation in swine diets

Abstract

This study was conducted to evaluate the effects of exogenous hydrophilic emulsifier supplementation on apparent ileal nutrient digestibility in growing pigs. A total of 9 crossbred growing pigs ([Yorkshire × Landrace] × Duroc, average body weight (BW) : 22.95 ± 1.45kg) were allotted to each treatment in an individual metabolic crate to collect feces and urine separately in a completely randomized design (CRD) with 3 replicates per treatment. Treatments were : 1) Control : corn-SBM based diet with 3% tallow (ME 3,265 kcal/kg), 2) E0.05 : basal diet + 0.05% emulsifier (SOLMAX®50, KIMIN INC., Korea), 3) E0.10 : basal diet + 0.10% emulsifier. All other nutrients in experimental diet were met or exceeded the NRC requirement (1998). The experimental diets were provided twice daily at 07:00 and 19:00. In the results of the essential amino acids, the AID of lysine was increased as hydrophilic emulsifier level increased (linear, P<0.01). In addition, the AID of methionine and threonine were increased as hydrophilic emulsifier level increased (linear, P=0.03 and quadratic, P=0.01, respectively). However, the result in E0.05 treatment was differed significantly compared to that in control diet. Also, the AID of valine was increased as hydrophilic emulsifier level increased (quadratic, P<0.01) and the result in E0.05 treatment was significantly different compared to control treatment. The AID of saturated fatty acid was increased as hydrophilic emulsifier level increased (linear, P<0.01

quadratic, P=0.03) and the results in E0.05 and E0.10 treatments had a highly significant difference compared to those in control treatment (P<0.01). Among the saturated fatty acids, the AID of myristic acid (C14:0) was increased as hydrophilic emulsifier level increased (linear, P=0.04

quadratic, P=0.02) and the results in E0.05 and E0.10 treatments had a significant difference compared to control treatment (P=0.02). The AID of palmitic acid (C16:0), heptadecanoic acid (C17:0) and stearic acid (C18:0) were increased as hydrophilic emulsifier level increased (linear, P<0.01

quadratic, P<0.01). Regarding the AID of unsaturated fatty acids, there were no detectable effects on the AID except oleic acid (C18:1). The AID of oleic acid (C18:1) was increased as hydrophilic emulsifier level increased (quadratic, P=0.02) and the result in E0.05 treatment was significantly different compared to control treatment. Consequently, these results demonstrated that exogenous hydrophilic emulsifier supplementation improved the apparent ileal digestibility of amino acids and fatty acids, particularly essential amino acids and saturated fattty acids in growing pig.