Abstract:The experiment was conducted to investigate the effects of different treatment groups on growth performance,immune function and blood biochemical indexes of lambs.Thirty-six healthy Hu sheep lambs with similar body weight were randomly divided into control group (basal diet),trial group Ⅰ(70% basal diet+30% alfalfa meal) and trial group Ⅱ(70% basal diet+30% alfalfa meal+1% probiotics).The experiment lasted for 60 d.The results showed as follows:there were no significant differences in final weight,dry matter intake and ratio of feed to gain among all groups(P>0.05),and the average daily body gain in group Ⅱ increased by 10.40% compared to the control group(P<0.05),but no significant difference between group Ⅰ and control group(P>0.05).The levels of aspartate aminotransferase and alkaline phosphatase in group Ⅱ were significantly lower than those in control group(P<0.05).The levels of triglycerides in groups Ⅰ and Ⅱ were significantly lower than those in control group(P<0.05).The IgG content in group Ⅱ was significantly higher than that of the other two groups(P<0.05),but the IgA and IgM contents were not significantly different among groups(P>0.05).Therefore,dietary supplementation with probiotics and forage fiber can improve growth performance of lambs,improve some serum biochemical indexes,and enhance the immune function and body resistance of lambs.
