Dietary supplementation of Bacillus subtilis PB6 improves sow reproductive performance and reduces piglet birth intervals

• 来源期刊: 动物营养（英文版）
• 年，卷（期）: 2020,（3）
• 所属期刊栏目: SWINE NUTRITION
• 页码范围: 278-287
• 页数: 10页
• 语种: 英文

摘要

We investigated the effects of dietary supplementation with Bacillus subtilis PB6(B.subtilis PB6)during late gestation and lactation on sow reproductive performance,antioxidant indices,and gut microbiota.A total of 32 healthy Landrace x Yorkshire sows on d 90 of gestation were randomly assigned to 2 groups,with 16 replicates per group,receiving basal diet(CON)or the basal diet+0.2％B.subtilis PB6,containing 4.0 × 108 CFU/kg of feed(BS).The litter sizes(total born)and numbers of piglets born alive were larger in the BS group(P ＜ 0.01),whereas the weights of piglets born alive and the piglet birth intervals were lower in the BS group(P ＜ 0.05).Although the litter weights and piglet bodyweights(after cross-fostering)were lower after BS treatment(P ＜ 0.05),the litter sizes,litter weights,lactation survival rate,and litter weight gains at weaning were higher in BS group(P ＜ 0.05).The concentrations of malondialdehyde(MDA)in the sow sera at parturition were lower in the BS group(P ＜ 0.01).The serum total antioxidant capacity(T-AOC)at parturition and the serum catalase(CAT)concentrations on d 21 of lactation were higher in the BS group(P ＜ 0.05).Dietary supplementation with B.subtilis PB6(P ＜ 0.05)reduced the serum endotoxin concentrations in the sows and the serum cortisol concentrations of the piglets at d 14 of lactation.The α-diversity indices of microbial were higher in the CON group(P ＜ 0.05).At the phylum level,B.subtilis PB6 supplementation increased the relative abundances of Gemmati-monadete and Acidobacteria(both P ＜ 0.01)and reduced those of Proteobacteria,and Actinobacteria(both P ＜ 0.05).At the genus level,B.subtilis PB6 supplementation increased the relative abundance of Ruminococcaceae_UCG-013 cc(P ＜ 0.05)and reduced that of Streptococcus(P ＜ 0.05).This study demonstrated that adding 4.0 × 108 CFU/kg B.subtilis PB6 to sows'feed during late gestation and lactation could shorten piglet birth intervals,enhance the growth performance of suckling piglets,and improve the gut health of sows during late gestation.