Effects of compound probiotics on growth performance,nutrient apparent digestibility,immune function,and serum biochemical indexes of mutton sheep
WANG Xinian
AN Xiaoya
TIAN Zongxiang
LI Ruijie
Abstract：The experiment aimed to investigate the effects of adding different doses of compound probiotics on the growth performance,nutrient apparent digestibility,immune function,and serum biochemical indexes of mutton sheep.A total of 48 healthy and health Duhu crossbred lambs with similar body weights were randomly divided into four groups,with three replicates per group and four lambs per replicate.The control group was fed a total mixed diet,while the experimental groups were fed the total mixed diet supplemented with 0.1％,0.2％,and 0.3％compound probiotics,respectively.The pretrial period lasted for seven days,the formal trial period lasted for 60 days.The results showed that compared with the control group,the average daily gain in the 0.2％and 0.3％groups significantly increased by 14.08％and 14.64％(P＜0.05),and the feed-to-weight ratio significantly decreased by 7.11％and 6.94％(P＜0.05).Compared with the control group,the apparent digestibility of crude protein and crude fat in the 0.2％group significantly increased(P＜0.05),and the apparent digestibility of neutral detergent fiber in the 0.2％and 0.3％groups significantly increased(P＜0.05).The serum immunoglobulin G(IgG)content in the experimental groups was 16.65％,21.89％,and 18.40％significantly higher than that in the control group(P＜0.05),and the serum interleukin-2(IL-2)content in the 0.2％and 0.3％groups was significantly higher than that in the control group(P＜0.05).Compared with the control group,the serum urea nitrogen(BUN)content in the experimental groups significantly decreased by 15.95％,19.43％,and 17.69％(P＜0.05),the serum total protein(TP)content in the 0.2％and 0.3％groups significantly increased(P＜0.05),and the activities of serum aspartate aminotransferase(AST)and alkaline phosphatase(ALP)significantly decreased(P＜0.05).The serum total cholesterol(TC)and triglyceride(TG)concentrations in the experimental groups showed a decreasing trend(P＞0.05).The study indicates that 0.2％compound probiotics in the diet can help mutton sheep to absorb feed nutrition,improve body health and growth performance.
Keywords：compound probioticsmutton sheepgrowth performancenutrient apparent digestibilityimmune functionserum biochemical indexes
Publication Date：2025-02-16
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 18-22 )