Effects of Dietary Neutral Detergent Fiber Level on Growth Performance,Digestive Capacity,Intestinal Microbiota and Metabolic Products of Jinfen White Pigs
This study aimed to assess the effects of different neutral detergent fiber(NDF)level diets on the growth performance,antioxidant capacity,digestive capacity,intestinal microbiota and metabolic products of Jinfen white pigs.A total of 80 Jinfen white pigs,averaging(19.72±0.37)kg in weight,were randomly allo-cated to four groups,each comprising five replicates with four pigs(half male and half female)per replicate.Pigs in the four groups were fed diets with NDF level of 9.0％(without soybean husk,9N group),13.5％(with 9.35％soybean husk,13.5N group),18.0％(with 18.64％soybean husk,18N group)and 22.5％(with 28.03％soybean husk,22.5N group),respectively,and the 9N group served as control group.The pre-trial period lasted for 7 days,and the experimental period lasted for 30 days.The results showed as follows:1)the feed-to-gain ratio significantly decreased in the 9N,18N and 22.5N groups compared with the 13.5N group(P＜0.05).2)22.5N group exhibited significantly higher serum total antioxidant capacity than that in 9N and 18N groups(P＜0.05).3)The cellulase content in the anterior segment of the colon in the 13.5N and 22.5N groups was significantly higher than that in the 18N and 9N groups(P＜0.05).4)The apparent digestibility of crude protein in the 18N and 22.5N groups was significantly lower than that in the 9N and 13.5N groups(P＜0.05).5)9N group exhibited the highest propionic acid and isobutyric acid concentrations,while 13.5N group showed the highest butyric acid and valeric acid concentrations(P＜0.05).The alpha diversity indexes of intes-tinal microbiota in the 13.5N,18N,and 22.5N groups were significantly higher than those in the 9N group(P＜0.05);the relative abundance of Prevotella_9 in colon contents in the 18N group was significantly higher than that in the 9N and 22.5N groups(P＜0.05),and the relative abundance of Lachnospira in colon contents in the 13.5N group was significantly higher than that in the 9N group(P＜0.05);propionic acid,isobutyric acid and isovaleric acid all showed significant or extremely significant positive correlation with Prevotella_9(P＜0.05 or P＜0.01),and butyric acid showed a extremely significant positive correlation with Lachnospira(P＜0.01).7)The expression level of γ-L-glutamyl-L-glutamate in the colon contents in the 13.5N group was significantly higher than that in the other three groups(P＜0.05).Based on these findings,the appropriate im-provement of the dietary NDF level reduces the feed-to-gain ratio,improves the antioxidant capacity of the body,improves the digestive capacity of the body,increases the diversity of intestinal microbiota,improves the intestinal health,affects the metabolic products of the body,and then promotes the healthy development of the body.of Jinfen white pigs.Under the condition of this experiment,the optimal dietary NDF level for Jinfen white pigs is within the range of 13.5％to 18.0％.[Chinese Journal of Animal Nutrition,2024,36(6):3601-3618]
Jinfen white pigsdietary NDF levelgrowth performancedigestive capacityintestinal microbi-otametabolic products
万方数据
维普
