Effects of Mulberry Leaf Extract on Growth Performance,Slaughter Performance,Meat Quality,Serum Biochemical Indexes and Antioxidant Ability of Mallards
The purpose of this study was to investigate the effects of dietary mulberry leaf extract on growth performance,slaughter performance,meat quality,serum biochemical indexes and antioxidant capacity of mal-lards.A total of 360 mallards with similar weight at 30 days of age were randomly divided into 4 groups with 6 replicates per group and 15 mallards per replicate.The control group was fed a basal diet,and the experimental groups were fed 100,200 and 400 mg/kg of mulberry leaf extract in the basal diet.The pre-experimental peri-od was 7 days and experimental period was 60 days.The results showed as follows:1)the average daily gain in 400 mg/kg group was significantly higher than that in control group(P＜0.05).2)Breast muscle percent-age and leg muscle percentage in 200 and 400 mg/kg groups were significantly higher than those in control group(P＜0.05).3)Meat brightness and redness values in 200 and 400 mg/kg groups were significantly in-creased compared with control group(P＜0.05),while meat yellowness value was significantly decreased com-pared with control group(P＜0.05).4)Meat cholesterol content in 400 mg/kg group was significantly lower than that in control group(P＜0.05),and inosine content was significantly higher than that in control group(P＜0.05).5)Compared with control group,serum cholesterol,glucose and low density lipoprotein cholester-ol contents were significantly decreased in 400 mg/kg group(P＜0.05).6)Compared with control group,ser-um total antioxidant capacity,superoxide dismutase and glutathione peroxidase activities were significantly in-creased in 400 mg/kg group(P＜0.05).In conclusion,dietary supplementation of mulberry leaf extract of mallards can improve growth performance and slaughter performance,meat quality and enhance serum antioxi-dant capacity.In this study,400 mg/kg of mulberry leaf extract is recommended for mallard ducks.[Chinese Journal of Animal Nutrition,2023,35(12):7786-7795]
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