植物精油对大口黑鲈生长、抗氧化能力和肠道健康的影响OA

The experiment aimed to investigate the effects of oregano essential oil and cinnamon essential oil on the growth,antioxidant capacity,and intestinal health of largemouth bass.A total of 480 largemouth bass with an initial body weight of(30.26±0.59)g were randomly divided into four groups,with three replicates per group and 40 fish per replicate.The control group(group CON)was fed a basal diet,while the experimental groups were fed the basal diet supplemented with 100 mg/kg cinnamon essential oil(group CEO),100 mg/kg oregano essential oil(group OEO),and 50 mg/kg cinnamon essential oil+50 mg/kg oregano essential oil(group CPEO),respectively.The pre-test period was two weeks,and the formal test period was eight weeks.The results showed that compared with group CON,the final body weight,weight gain rate,and specific growth rate in group OEO were significantly increased(P<0.05).The serum superoxide dismutase(SOD)activity in groups CEO and CPEO was significantly increased(P<0.05).The catalase(CAT)activity in groups OEO and CPEO was significantly increased(P<0.05),and the malondialdehyde(MDA)content was significantly decreased(P<0.05).The glutathione peroxidase(GSH-Px)activity in group CPEO was significantly higher than that in the other groups(P<0.05).The relative expression levels of hepatic SOD and CAT genes in the experimental groups were upregulated to varying degrees.Compared with group CON,the intestinal villus height in groups OEO and CPEO was significantly increased(P<0.05),and the intestinal villus width in group CPEO was significantly increased(P<0.05).The study shows that dietary supplementation with oregano essential oil can promote the growth of largemouth bass,and the combined supplementation of oregano essential oil and cinnamon essential oil exerts synergistic effects on enhancing antioxidant capacity and improving intestinal health,with better efficacy than either essential oil alone.