Abstract: The experiment was conducted to study the effects of compound probiotics on growth performance, apparent digestibility and serum biochemical traits of finishing sheep. One hundred and eighty finishing sheep with an average body weight of (20.45±0.77)kg were randomly divided into 3 groups with 3 replicates per group of 20 sheep per replicate.The control group was fed the basal diet, the groups Ⅰ and Ⅱ were fed the basal diet in which 0.1% and 0.2% compound probiotics were supplemented. The experiment lasted for 30 d. The results showed that the average daily gain of the experiment groups Ⅰ and Ⅱ were both higher than that of the control group, higher above 12.88％ （P<0.05） and 7.36％ （P>0.05） respectively, and the average daily feed intake in experiment groups was higher than that of the control group（P＞0.05).The number of F/G in experiment groups Ⅰ and Ⅱ were lower 6.50% and 6.00% than that of the control group（P<0.05）. The apparent digestibility of organic matter, crude protein and acid detergent fiber were significantly increased in the experiment groups (P＜0.05). The BUN in the serum of the experiment groups Ⅰ and Ⅱ were significantly lower than that of the control group(P＜0.05), the Glu were significantly higher than that of the control group(P＜0.05). But the effect on other blood indices was similar to that of the control group (P＞0.05). It concluded that feeding compound probiotics could improve the growth performance and apparent digestibility of nutrients, reduce the contents of BUN in serum, increase the contents of Glu in serum of finishing sheep, and better effect was obtained in the group of 0.1% compound probiotics.

Key words: finishing sheep; growth performance; apparent digestibility; serum biochemical traits