酶菌复合制剂对肉羊生长性能、血清指标、消化代谢及屠宰性能的影响OA

This study aims to investigate the effects of a compound preparation of enzymes and probiotics on growth performance,serum indices,digestibility metabolism,and slaughter performance of Australian-Hu mutton sheep.A total of twenty-four 60-day-old Australian-Hu mutton sheep with similar body weights were randomly assigned to two groups:control group and compound preparation of enzymes and probiotics(containing Enterococcus faecium,Saccharomyces cerevisiae,Bacillus licheniformis,xylanase,cellu-lase and alkaline protease)group.Each group had 12 sheep,the pretest period lasted for 10 d,and the test period lasted for 60 d.The control group was fed a basal diet,while the compound prepara-tion of enzymes and probiotics group was fed the basal diet+10 g/d compound preparation of enzymes and probiotics 30 d before the experiment and the basal diet+15 g/d compound preparation of enzymes and probiotics 30 d after the experiment.The results showed as follows:① compared with the con-trol group,the compound preparation of enzymes and probiotics resulted in a significant increase in final body weight and average daily gain(P<0.05),and the ratio of feed to gain was significantly decreased(P<0.05).②On day 60 of the trial,immunoglobulin G,interleukin-10,total protein content and total antioxi-dant capacity of serum in the compound preparation of enzyme and probiotics group were significantly higher than control group(P<0.05).③ Apparent digestibility of crude protein and neutral detergent fiber in the compound preparation of enzyme and probiotics group was significantly higher than that in control group(P<0.05).④ The digestible energy,metabolizable energy,metabolizability of digestible energy,apparent digestible nitrogen,retained nitrogen and utilization efficiency of nitrogen were all significantly higher in the compound preparation of enzyme and probiotics group compared to the control group(P<0.05).⑤ The a*value of the longus dorsi muscle at 0 h after slaughter and the pH at 24 h after slaughter in the compound preparation of enzyme and probiotics group were significantly higher than those in the control group(P<0.05).In conclusion,the diet was supplemented with 10 to 15 g/d the compound preparation of enzymes and probiotics significantly enhances growth performance,antioxidant capacity,immunity,apparent nutrient digestibility,energy and nitrogen metabolism and meat quality efficiency in 60-day-old Australian-Hu mutton sheep.