IntroductionThis study was conducted to explore the effects of supplementary feeding of bamboo powder on the physical parameters of sows during the perinatal period of 7 days ± in parturition, including farrow duration, serum biochemical indexes, fecal physicochemical indexes, and microbial flora.MethodsThirty pregnant sows were randomly divided into three groups: the control group was fed a basal diet, TRE1 group and TRE2 group were fed a basal diet supplemented with 30 g d−1and 60 g d−1bamboo powder, respectively. Multiple parameters of sows and offspring piglets were determined.ResultsThe contents of serum total cholesterol and triglyceride of sows in TRE2 group were significantly lower than those in the control group. The contents of serum malondialdehyde of sows in TRE2 and TRE1 groups were significantly lower than that in control group. The water content of sow feces in TRE2 group was significantly higher than that in control group, and the pH values of sows in TRE2 and TRE1 groups were significantly higher than that in control group. The richness index (Chao) of sow fecal bacterial community in TRE2 group was significantly lower than that of the control group, and the Ace and Sobs indexes tended to be lower than those of the control group. At the phylum level, the relative abundance ofActinobacteriotain the feces of sows in TRE2 group was significantly lower than that of the control group, while that ofFusobacteriotain the feces of suckling piglets in TRE2 group tended to be lower than that of the control group. At the genus level, among the Top10 dominant bacteria, the relative abundance ofTissierellain the feces of sows in TRE2 group was significantly lower than that of the control group while that ofFusobacteriumin the feces of suckling piglets in TRE2 group tended to be lower than that of the control group. The relative abundance ofClostridium_sensu_stricto_1,Terrisporobacter,Turicibacter, andTissierellain the feces of sows in TRE2 group was significantly lower than that of TRE1 group (p< 0.05), whileLactobacillustended to be higher than that of TRE1 group (p< 0.10).DiscussionThe results suggested that supplementary feeding 60 g d−1bamboo powder could increase the water content in the feces of sows, reduce the oxidative damage, and tend to reduce the relative abundance of opportunistic pathogenicFusobacteriumfor suckling piglets, while it reduced the fecal microbial diversity of sows.