PSX-31 Effects of Dietary Non-starch Polysaccharide (NSP) and NSP-Degrading Enzyme Complex (Endo-PowerTM) Supplementation on Growth Performance, Intestinal Environments and Systemic Immune Responses in Growing Pigs.

Abstract

The objective of this experiment was to investigate the effects of non-starch polysaccharide (NSP) and NSP-degrading enzyme complex (NEC) levels on growth performance and gut environment in growing pigs. NEC is known to improve the utilization of nutrient in feed. Beside of this increased digestibility, NEC is also known to promote gut health by increased villus height. Therefore, we conducted an experiment with diets included NSP-rich feed ingredients (wheat and barley) and NEC (Endo-PowerTM; α-1,6-galactosidase and β-galactomannanase). One hundred eight 8-week-old pigs were randomly allotted into a 2x3 factorial designed experiment with 6 replications. The high- (H-) or low-NSP contained (L-) diet supplemented with 3 dietary levels of NEC, 0% (CON), 0.1% (NEC-0.1), and 0.2% (NEC-0.2), was provided for four weeks. One pig from each pen was sacrificed to collect plasma, jejunum, ileal content and cecal content samples. The data was analyzed using ANOVA procedures of SAS 9.4. The means were compared by Duncan’s multi-range test at P<0.05 level of significance. Body weight, average daily gain, and feed intake in L-NEC-0.1 and H-NEC-0.2 treatments were significantly higher (P<0.05) than other treatments during the whole experimental period. In L-diet treatments, cecal population of coliform was significantly reduced and cecal butyrate concentration was significantly increased by NEC-0.1 supplementation (P<0.05). And in H-diet treatments, plasma IL-4 and IL-6 levels were significantly decreased, and jejunal villus heights and ileal energy digestibility were significantly increased by NEC-0.2 supplementation (P<0.05). These results imply that growth-promoting effects of NEC were maximized in L-NEC-0.1 and H-NEC-0.2 treatments via modulation of gut environments. It seems that NEC’s mechanism in gut appears to be different depending on the dietary NSP levels.