Effect Of Soluble Fiber In Late Gestation Diet On Reproduction Performance,Metabolism And Microbial Composition Of Sows

This study was aimed to investigate the effects of dietary soluble dietary fiber levels during late gestation on sow reproductive performance,metabolites,and gut microbiota.Total 87 of LY sows were randomly assigned to four groups,based on soluble dietary fiber levels: 3.63% SF group,4.34% SF group,5.05% SF group and5.77% SF group,respectively.The results showed that 5.05% SF during late gestation improved serum glucose concentration of sows(P < 0.05),and prevented prolonged farrowing duration(P < 0.10),which significantly reduced stillborn number(P <0.05).Compared to 3.63% SF group,5.05% SF group improved serum activity of total antioxidant capacity(T-AOC),superoxide dismutase(SOD)and glutathione peroxidase(GSH-Px)(P < 0.05).Additionally,ADFI of sows,piglet birth weight,and weaning litter weight during lactation were also increased with increasing SF level(quadratic,P < 0.05).And the proportion of newborn piglets with a body temperature above 38.5 ℃,and piglet diarrhea rate during lactation significantly decreased with the increase of soluble dietary fiber level(P < 0.05),piglet survival rate(linear,P <0.05)increased with increasing SF levels in sow diets during late gestation.16 S rRNA sequencing was conducted to analyze the diversity and composition of intestinal microbiota for sows.Compared to 3.63% SF group(basal diet),5.05% SF group with the best production performance reduced relative abundance of Streptococcus,increased relative abundance of CF231,Paludibacter,Parabacteroides,Phascolarctobacterium,Sutterella,and Desulfovibrio.In conclusion,an appropriate level of soluble dietary fiber during late gestation improved antioxidant capacity in sows,regulated sow energy metabolism and piglet health,and improved reproduction performance,and the potential mechanisms might be via regulating gut microbiota.