Effects of dietary lysophospholipid complex on apparent ileal digestibility and growth performance in nursery pigs

Abstract Text: Two experiments were conducted to evaluate the effect of dietary lysophospholipid complex (LPC; Lipidol, Easybio System, Korea) on apparent ileal digestibility (AID) and growth performance of nursery pigs. The LPC used in this study includes lysolecithin, lysophosphatidylinositol, lysophosphatidylethanolamine, and lysophosphatidic acid (5%) with calcium silicate as a carrier (95%). In Exp 1, 24 newly weaned pigs (12 barrows and 12 gilts at 7.2 ± 0.1 kg BW) were randomly allotted to 2 treatments in a randomized complete block design. Sex and initial BW were used as blocks. Pigs were fed a basal diet supplemented with either 0 or 0.1% LPC in 2 phases (7 and 12 d, respectively). Titanium dioxide (0.5%) was added to the diets from d 14 as an indigestible external marker. Body weight and feed consumption were recorded on d 7, 14, and 19. On d 19, jejunal digesta were collected to measure viscosity and ileal digesta were collected to measure AID of DM, GE, lipid, and CP. In Exp 2, 150 pigs at 6 wk of age (75 barrows and 75 gilts, 14.2 ± 0.2 kg BW) were randomly allotted to 2 treatments in a randomized complete block design. Sex and initial BW were used as blocks. Pigs were fed a basal diet supplemented with either 0 or 0.1% LPC for 3 wk. Body weight and feed consumption were recorded weekly. Blood samples were collected at the end of the study to measure the concentrations of tumor necrosis factor-α and immunoglobulin G to observe general health status of pigs. Data were analyzed using the Mixed Model procedure of SAS. In Exp 1, AID of lipid tended to be increased (72.7 to 84.2%, P = 0.086) by LPC whereas AID of DM, GE, and CP were not affected. Viscosity of jejunal digesta were not affected by LPC. Dietary LPC increased ADG (681 to 774 g/d, P < 0.05) and ADFI (1,000 to 1,089 g/d, P < 0.05) of nursery pigs from d 14 to 19. In Exp 2, dietary LPC tended to increase (P = 0.072) ADG (664 to 708 g/d) during 3 wk period whereas ADFI and G:F were not affected by dietary LPC. Serum concentrations of tumor necrosis factor-α and immunoglobulin G were not affected by dietary LPC. In conclusion, dietary supplementation of LPC improved growth of nursery pigs potentially by enhancing lipid digestibility.

Keywords: apparent ileal digestibility, growth performance, lysophospholipid, nursery pigs