Effects of chestnut bur tannic acid on growth performance,diarrhea rate,intestinal morphology,and intestinal microbial of weaned piglets

ZHAO Pengyu; CAI Yayuan; WU Lifei; LIU Jingyun; SONG Weiguang

doi:10.13557/j.cnki.issn1002-2813.2025.01.008

Abstract：The experiment aimed to explore the effects of chestnut bur tannic acid on the growth performance,diarrhea rate,intestinal morphology,and intestinal microbial of weaned piglets.A total of 120'Duroc × Landrace × Yorkshire'crossbred weaned piglets at 28 days of age were selected and randomly divided into five groups,with four replicates per group and six piglets per replicate.The control group was fed a basal diet.The low-dose chestnut bur tannic acid group was fed the basal diet supplemented with 500 mg/kg of chestnut bur tannic acid.The medium-dose chestnut bur tannic acid group was fed the basal diet supplemented with 750 mg/kg of chestnut bur tannic acid.The high-dose chestnut bur tannic acid group was fed the basal diet supplemented with 1 000 mg/kg of chestnut bur tannic acid.The chestnut wood tannic acid group was fed the basal diet supplemented with 750 mg/kg of chestnut wood tannic acid.The pre-test lasted for 7 days and the experiment lasted for 28 days.The results showed that the average daily feed intake of the low-and medium-dose chestnut bur tannic acid groups and the chestnut wood tannic acid group was significantly higher than that of the control group(P＜0.05).The average daily weight gain and final weight of experimental groups were significantly higher than those of the control group(P＜0.05).The diarrhea rate of experimental groups from day 1 to day 28 was significantly lower than that of the control group(P＜0.05).The villus height of the duodenum in experimental groups was higher than that of the control group(P＞0.05),and the villus height of the ileum in the medium-dose chestnut bur tannic acid group was significantly higher than that of the control group(P＜0.05).The experimental groups could significantly increase the Simpson and Shannon indices of the intestine(P＞0.05).The low-and high-dose chestnut bur tannic acid groups and the chestnut wood tannic acid group had the effect of reducing the relative abundance of Proteobacteria(P＞0.05).The study indicates that chestnut bur tannic acid has the effect of improving growth performance and reducing the diarrhea rate,can improve the intestinal development of piglets,and increase the α-diversity of intestinal flora.Adding 750 mg/kg of chestnut bur tannic acid to the diet of weaned piglets is relatively effective.