Effects of eucalyptus essential oil on growth performance,intestinal histol-ogy,and antioxidant capacity of juvenile Pseudobagrus fulvidraco
To investigate the effects of eucalyptus essential oil on the growth and development of juvenile Pseud-obagrus fulvidraco,this study used juvenile P.fulvidraco as the research object.Different concentrations of eucalyptus es-sential oil were added to the basal diet of juvenile P.fulvidraco(the additions of eucalyptus essential oils in treatments L16,L32,L48,L64 were 0.16 mL/kg,0.32 mL/kg,0.48 mL/kg,0.64 mL/kg,respectively),and their growth per-formance,antioxidant capacity and intestinal health were evaluated.The results indicated that eucalyptus essential oil had no effect on the growth or morphological indices of juvenile P.fulvidraco.However,eucalyptus essential oil was able to im-prove the intestinal histological structure of juvenile P.fulvidraco,with L48 and L64 treatments showing better effects.Spe-cifically,the anterior intestinal muscularis thickness,mid-intestinal villus length,mid-intestinal villus width,and mid-in-testinal muscularis thickness of juvenile P.fulvidraco under L48 treatment were significantly higher than those of control(P<0.05).The villus length,villus width,and muscularis thickness of both the mid-intestine and hind-in-testine of juvenile P.fulvidraco under L64 treatment were significantly higher than those of control(P<0.05).Additionally,eucalyptus essential oil enhanced the activities of super-oxide dismutase and glutathione peroxidase in the liver and intestine of juvenile P.fulvidraco,with L48 and L64 treatments exhibiting superior effects.In summary,the optimal concentration range for adding eucalyptus essential oil to the basal diet of juvenile P.fulvidraco is 0.48 mL/kg to 0.64 mL/kg.The results of this study provide a theoretical basis for the applica-tion of eucalyptus oil in aquaculture.
万方数据
维普
