To clarify the feeding values of medicinal plants,juvenile triploid crucian carps(No.3)were randomly divided into five groups and fed with basic feed(control group)and feeds supplemented with 4%Portulaca oleracea L.,4%Plantago asiatica L.,4%Houttuynia cordata Thunb.and 4%coumpounds(Portulaca oleracea L.∶Plantago asiatica L.∶Houttuynia cordata Thunb.=1∶1∶3)for 85 days.The results showed that compared with the control group,Portulac-a oleracea L.and Plantago asiatica L.significantly increased the relative weight gain rate and specific growth rate of fish(P＜0.05),and significantly reduced the feed coefficient(P＜0.05).Houttuynia cordata Thunb.slightly reduced the specific growth rate and slightly increased the feed coefficient,but the difference was not significant(P＜0.05).Portulaca oleracea L.significantly increased the content of crude protein and significantly decreased the content of crude fat(P＜0.05),while Plantago asiatica L.significantly decreased the content of crude protein and signifi-cantly increased the content of crude fat(P＜0.05).Portulaca oleracea L.,Houttuynia cordata Thunb.and compounds could significantly reduce the activities of alanine aminotransferase(ALT)and aspartate aminotransferase(AST),the con-tents of malondialdehyde(MDA),total cholesterol(TC)and total triglyceride(TG)in liver(P＜0.05),significantly en-hance the activities of superoxide dismutase(SOD)and glutathione peroxidase(GSH-Px)in liver(P＜0.05),and im-prove the structure of liver tissue.Portulaca oleracea L.significantly improved the midgut villus structure,while Houttuynia cordata Thunb.made the midgut villus structure worse.In summary,under the 4%addition level,the feeding value of Por-tulaca oleracea L.was the highest,followed by Plantago asiatica L.and compounds,and then Houttuynia cordata Thunb.
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