Abstract:The experiment aimed to investigate the effects of three probiotic fermented herbal supplements on the production performance, serum biochemical indices and immune function of weaned lambs.A total of 100 small-tailed Han sheep with similar appearance and body weight (15.19±0.81 kg) were selected and randomly divided into 5 groups, with 4 replicates in each group and 5 sheep in each replicate.Group I, II, III and IV were supplemented with 0%, 0.5%, 1.0% and 1.5% fermented traditional Chinese medicine preparations to the basic diet, while group V were added 1.0% pure compound herbal supplements to the basic diet, with a pre-trial period of 3 days and a main trial period of 40 days.The results showed that the average body weight of the test groups III, IV, and V was significantly higher than that of the control group (P<0.05), and there was a significant difference between group II and IV(P<0.05);? the ADG of the test groups II, III, IV, and V was significantly higher than that of the control group (P<0.05), and there were significant differences between groups II, III, IV, and V and group II (P<0.05), and between groups IV and III, and V (P<0.05); the ADFI of the test groups III, IV, and V was significantly higher than that of the control group (P<0.05), and there was a significant difference between groups II and IV (P<0.05). The TP content of the test groups III, IV, and V was significantly higher than that of the control group (P<0.05); the GLO content of the test groups III, IV, and V was significantly higher than that of the control group (P<0.05), and there was a significant difference between groups III and I, II (P<0.05); the ALP content of group III was significantly higher than that of the control group (P<0.05). The IL-2 content of groups III and IV was significantly higher than that of the control group (P<0.05), and there was a significant difference between groups III, IV and II (P<0.05); the IgA content of the test groups II, III, IV, and V was significantly higher than that of the control group (P<0.05), and there were significant differences between groups III, IV and II, V (P<0.05); the IgG content of group III was significantly higher than that of the control group (P<0.05), and there was a significant difference between groups II and III (P<0.05). In conclusion, the three probiotic fermented compound herbal preparations can significantly improve the productive performance and immune function of weaned lambs, and can also improve their blood biochemical indicators, with the optimal addition ratio is 1.0%.
