Abstract: This study was aimed to investigate the effect of the Chinese herbal medicine on immune function and serum biochemical indexes of Rex rabbits.12030-day-old healthy Rex rabbits (half male and half female) with similar body weight were randomly divided into 6 groups with 4 replicates in each group and 5 rabbits in each replicate.The diets of these groups were basal control diet (control group),positive control diet containing 4 mg/kg diclazuril (group Ⅰ),and experimental diets containing 0.5% (group Ⅱ),1.0% (group Ⅲ),1.5% (group Ⅳ) and 2.0% (group Ⅴ) Chinese herbal medicine,respectively.The pre-test lasted for 7 days,and the trial period lasted for 50 days.The results showed as follows:①Compared with control group,dietary supplementation of Chinese herbal medicine increased the thymus index,spleen index and serum IgG content of Rex rabbits,but had no significant effect on spleen index (P>0.05).②Compared with control group,dietary supplementation of Chinese herbal medicine increased the serum TP,ALB,GH,IGF-Ⅰ and T4 contents of Rex rabbit,and that in 1.5% group were significantly increased by 4.40%,7.46%,12.76%,23.53% and 6.24% (P<0.05),respectively,but had no significant effect on serum GLB and T3 contents (P>0.05).In conclusion,Chinese herbal medicine had obvious regulation effect on serum immune to Rex rabbits,improving the development of immune organs and immune function of animal body.And the recommended supplemental level of Chinese herbal medicine was 1.5% in diet for Rex rabbits.

Key words: Chinese herbal medicine; Rex rabbits; immune; serum biochemical indexes