复合益生菌对西杂牛育肥效果及血液指标的影响OA

To investigate the effects of compound probiotics(CPP)on fattening performance and blood indicators of finishing beef cattle,a total of twenty 14-month-old Western crossbred beef cattle bulls were chosen and divided into the treatment group(10 bulls)with initial body weights of(358.83±32.11)kg and the control group(10 bulls)with initial body weights of(368.83±16.72)kg.The control group(10 bulls)was fed a basal diet,while the treatment group(10 bulls)was fed the basal diet supplemented with 0.2%CPP.The experiment included a 10-day pre-feeding period followed by a 60-day formal trial period.Growth performance,blood biochemical indicators,antioxidant indicators,immune indicators,serum hormone and metabolic regulation indicators,and digestive enzyme activities were measured.The results showed that the average daily gain(ADG)of the treatment group was significantly higher than that of the control group(P<0.05),while the feed-to-gain ratio(F/G)was significantly lower than that of the control group(P<0.05).Body height,body oblique length,chest girth,and cross hip height were slightly higher in the treatment group than in the control group(P>0.05).Serum alkaline phosphatase(ALP)and uric acid(UA)levels in the treatment group were extremely significantly higher than those in the control group(P<0.01),and inorganic phosphorus(P)content was significantly higher than that in the control group(P<0.05).Interleukin-6(IL-6)content in the treatment group was significantly higher than that in the control group(P<0.05),and α-glucosidase activity was extremely significantly higher than that in the control group(P<0.01).In conclusion,dietary supplementation with CPP can promote skeletal development,regulate lipid metabolism,enhance antioxidant capacity,improve growth performance and feed conversion efficiency,and ultimately enhance the fattening performance of beef cattle.