不同剂型蓝桉精油对保育猪生长性能、血清生化和抗氧化指标的影响OA

This experiment was conducted to investigate the effects of different forms of Eucalyptus globulus essential oil(EEO)on the growth performance,serum biochemistry,and antioxidant indexes of weaned pigs.A total of 360 healthy"Duroc×Landrace×Yorkshire"nursery pigs with an average age of 57 d and an aver-age body weight of 20.38 kg were selected.They were randomly divided into three groups,with four repli-cates per group and 30 pigs per replicate.The con-trol group was fed a basal diet,while the regular form group and the coated form group were supple-mented with 200 mg/kg of regular form and coated form EEO,respectively,in the basal diet.The experimental period lasted for 28 d.The results showed that:① dietary supplementation with coated form EEO significantly increased the final body weight,average daily gain(ADG),and aver-age daily feed intake(ADFI)of nursery pigs(P<0.05),and decreased the feed-to-gain ratio(F/G)(P<0.05).However,regular form EEO had no sig-nificant effects on the growth performance of nursery pigs(P>0.05).② Dietary supplementation of coated form EEO significantly increased the serum contents of immunoglobulin A(IgA)and immunoglobulin M(IgM)in nursery pigs(P<0.05).In contrast,regular form EEO had no significant effects on the serum levels of IgA and IgM in nursery pigs(P>0.05).Additionally,neither regular form nor coated form EEO had signifi-cant effects on the serum contents of total protein(TP),albumin(ALB),urea nitrogen(UN)and immuno-globulin G(IgG)(P>0.05).③ Dietary supplementation of both regular form and coated form EEO had no sig-nificant effects on the serum total antioxidant capacity(T-AOC),glutathione peroxidase(GSH-Px)and superoxide dismutase(SOD)activity,or malondialdehyde(MDA)levels(P>0.05).In conclusion,dietary supplementation of 200 mg/kg coated EEO effectively improved the immune function and growth perfor-mance in nursery pigs.