Effects of Dietary Active Yeast on Growth Performance,Meat Quality and Intestinal Flora of Growing Meat Rabbits
The purpose of this experiment was to investigate the effects of dietary active yeast on growth per-formance,meat quality and intestinal flora of growing meat rabbits.A total of 360 thirty-five-day-old weaned rabbits were randomly divided into 3 groups with 6 replicates per group and 20 rabbits per replicate.Rabbits in the control group were fed a basal diet(no active yeast added),and others in experimental groups were fed the basal diets supplemented with 500 and 1 000 g/t active yeast,respectively.The experiment lasted for 34 days.The results showed as follows:1)compared with the control group,dietary supplemented with 500 and 1 000 g/t active yeast significantly increased the survival rate of growing meat rabbits(P＜0.05),and signifi-cantly decreased the average daily feed intake of growing meat rabbits(P＜0.05).2)Compared with the con-trol group,dietary supplemented with 500 g/t active yeast significantly increased the muscle drip loss(P＜0.05),while dietary supplemented with 1 000 g/t active yeast significantly decreased the muscle drip loss(P＜0.05).3)Compared with the control group,dietary supplemented with 1 000 g/t active yeast significantly in-creased the cecal microbiota Simpson index(P＜0.05);at phylum level,dietary supplemented with 1 000 g/t active yeast increased the relative abundance of Firmicutes in cecum;at genus level,dietary supplemented with 1 000 g/t active yeast increased the relative abundances of norank_f_Lachnospiraceae,norank_f_Muribacu-laceae,Lachnospiraceae_NK4A136_group and norank_f_norank_o_Clostridia_vadinBB60_group in cecum.4)The analysis of inter group species differences at the genus level showed that compared with the control group,dietary supplemented with 500 and 1 000 g/t active yeast significantly increased the relative abundance of Synergistes in cecum(P＜0.05),dietary supplemented with 500 g/t active yeast significantly increased the relative abundance of Anaerostipes in cecum(P＜0.05),and dietary supplemented with 1 000 g/t active yeast significantly increased the relative abundance of Bacillus in cecum(P＜0.05).In conclusion,dietary supple-mented with 500 and 1 000 g/t active yeast can improve the survival rate of growing meat rabbits,and reduce the average daily feed intake;dietary supplemented with 1 000 g/t active yeast can reduce the muscle drip loss and improve the meat quality of growing meat rabbits;dietary supplemented with 1 000 g/t active yeast can improve the intestinal flora structure of growing meat rabbits,which is conducive to the intestinal health.[Chi-nese Journal of Animal Nutrition,2024,36(4):2603-2611]
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