The experiment aims to explore the effects of adding Turmeric extract(TE)to feed on the growth performance,immune indicators,and intestinal morphology of piglets.640 healthy Duroc pigs with an average weight of 7.47±0.58 kg at 28 days old were randomly divided into 4 groups,with 8 replicates in each group and 20 pigs per replicate.Add 0,120,240,and 480 mg/kg of curcumin to the basic feed as experimental feed for each treatment group.The experimental period is 6 weeks.The results showed that the average daily weight gain of piglets in the group with 240 and 480 mg/kg TE was significantly increased by 5.20%and 4.86%compared to the control group(P＜0.05);The average daily weight gain of piglets in the group treated with 240 and 480 mg/kg TE was significantly reduced by 4.75%and 5.41%,respectively,compared to the control group(P＜0.05);In addition,turmeric extract had no significant effects on final weight,feed intake and diarrhea rate of piglets(P＜0.05).The serum Alb content in piglets treated with 240 and 480 mg/kg TE was significantly higher than that in the control group(P＜0.05);The serum Glb content of piglets in the group treated with 240 mg/kg TE was significantly higher than that in the control group(P＜0.05);Serum IL-2 and IFN of piglets with 240 and 480 mg/kg TE groups added-γ The content significantly increased(P＜0.05);In addition,TE had no significant effect on serum IgA,IgM,and IgG levels in piglets(P＞0.05).The height and V/C value of duodenal villi in piglets treated with 240 and 480 mg/kg TE were significantly higher than those in the control group(P＜0.05);The jejunal villus height and V/C value of piglets in the group treated with 240 and 480 mg/kg TE were significantly higher than those in the control group(P＜0.05);In addition,TE had no significant effect on the depth of crypts in various intestinal segments,the length of ileal villi,and the V/C value of piglets(P＞0.05).In summary,TE ultimately enhances the growth performance of piglets by improving their intestinal morphology and immunity.The optimal amount of TE added to piglet feed is believed to be 200 mg/kg.
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