To investigate the effects of the content of palmatine in the feed on the growth, antioxidant capacity and non-specific immunity of gifforia, added 0, 0.01%, 0.02%, 0.04% and 0.08% of palmatine in the basic feed, respectively, and fed juvenile gifforia with an average body mass of 0.5g for 12 weeks. The results showed that :(1) the dietary palmatine content had no significant effect on the feeding rate, final weight, daily weight gain coefficient and feed coefficient of tilapia (P >0.05), and the body weight gain in the E treatment was significantly higher than that in the control group (P < 0.05). (2) with the increase of the palmatine , the activity of AKP and T-AOC in serum showed an increasing trend, with the highest in the E treatment, the SOD activity of the D treatment was significantly higher than that of the other treatments (P < 0.05), and the MDA activity of each experimental treatments were lower than that of the control group. (3) with the increase of the palmatine ,The activities of SOD, AKP, T-AOC and CAT in the liver showed an increasing trend with the increase of the amount of flavine. The GSH-Px activity in the E treatment was significantly higher than that in other treatments (P < 0.05), and the MDA activity in each treatments were lower than that in the control group. (4) The LZM activity of the C and D treatments was significantly higher than that of the control group (P < 0.05),the phagocytic activity and expression level of gene IL-1β in the D treatment were significantly higher than that in the control group (P < 0.05), the expression level of gene TNF-α in the C treatment was significantly higher than that in the control group (P < 0.05), and the serum complement C4 activity showed an increasing trend, with the highest level in the E treatment. The results showed that adding 0.04%~0.08% palmatine in feed could effectively improve the antioxidant capacity of tilapia while maintaining good growth performance. |