Effects of yeast culture added to feed on growth performance,serum biochemistry,digestive enzyme activity,antioxidant capacity and immunity of Carassius auratus
The experiment aimed to verify the effects of yeast culture on growth performance,serum biochemistry,digestive enzyme activity,antioxidant capacity and immunity of Carassius auratus.300 Carassius auratus with an initial body weight of(13.0±0.50)g were selected and randomly divided into 4 treatments,each with 3 replicates and 25 fish per replicate.Feed feed containing yeast cultures of 0％,0.1％,0.3％,and 0.5％respectively,labeled as control group(CK),S1 group,S3 group,and S5 group,for 8 weeks of routine feeding.The results showed that adding yeast culture to the basic diet significantly could improved the terminal body mass,weight gain rate,and specific growth rate of Carassius auratus(P＜0.05),with the S3 group having the highest terminal body mass,weight gain rate,and specific growth rate,increasing by 16.77％,34.67％,and 23.93％,respectively;All three treatment groups were able to reduce the feed coefficient of Carassius auratus(P＜0.05),with the S3 group having the lowest feed coefficient,a decrease of 34.72％;Compared with the control group,the liver to body ratio and plumpness of Carassius auratus in the S5 group significantly increased(P＜0.05),with increases of 31.58％and 24.10％,respectively.The plumpness of Carassius auratus in the S3 group significantly increased by 20.51％(P＜0.05).Compared with the control group,the serum aspartate aminotransferase(AST)and alkaline phosphatase(ALP)of the S1 group were significantly increased by 38.45％(P＜0.05)and 47.87％(P＜0.05),while the serum triglyceride(TG)and alkaline phosphatase(ALP)of the S3 group were significantly reduced by 24.40％(P＜0.05)and 90.06％(P＜0.05),respectively.The serum albumin(ALB),aspartate aminotransferase(AST),alanine aminotransferase(ALT),and alkaline phosphatase(ALP)of the S5 group were significantly increased(P＜0.05),with an increase of 19.17％56.23％,267.42％,and 58.48％,the serum low-density lipoprotein cholesterol(LDL-C)of the S5 group was significantly reduced by 35.25％(P＜0.05);The serum triglyceride TG of S3 group was also significantly lower than that of S1 group(P＜0.05).Compared with the control group,the intestinal lipase and trypsin of S3 group were significantly increased(P＜0.05),reaching 398.46％and 307.40％,respectively.The intestinal lipase of S5 group was significantly increased by 267.70％(P＜0.05);The intestinal lipase and trypsin of S3 group were significantly higher than those in S1 group and S2 group(P＜0.05);The intestinal lipase of the S5 group was significantly higher than that of the S1 group(P＜0.05).Compared with the control group,the total antioxidant capacity(T-AOC),catalase(CAT),and glutathione peroxidase(GSH-PX)in the liver of the S3 group were significantly increased(P＜0.05),with increases of 12.5％,35.77％,and 11.92％,respectively.The CAT in the liver of the S1 group was significantly increased by 17.06％(P＜0.05);The CAT in liver of the S3 group was significantly higher than that of the S1 group(P＜0.05),while the liver glutathione peroxidase(GSH-PX)of the S5 group was significantly lower than that of the S1 group(P＜0.05).In summary,adding yeast culture to basic feed had a promoting effect on the growth performance of juvenile crucian carp,and improves the digestive enzyme activity,antioxidant capacity,and immunity of Carassius auratus.Among them,the 0.3％ yeast culture addition group had the best effect.
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NSTL
万方数据
维普
