Effects of Astragalus polysaccharides on growth performance,blood biochemical indicators,and meat quality of meat ducks
The aim of this study is to investigate the effects of Astragalus polysaccharides on the growth performance,blood biochemical indicators,and meat quality of meat ducks.16001-day-old cherry valley meat ducks were randomly divided into 4 groups,with 5 replicates in each group,with 80 ducks in each replicate.Add 0,100,200,and 400 mg/kg of Astragalus polysaccharides to the basic diet as experimental diets.The experiment lasted for a total of 35 days.The addition of Astragalus polysaccharides to the diet had a significant effect on the growth performance of meat ducks.Compared with the control group,the 200 mg/kg group increased body weight by 3.8%at 35 days of age,increased average daily weight gain by 3.9%,and decreased feed to weight ratio by 3.3%(P＜0.05).In addition,the addition of Astragalus polysaccharides to the diet had no significant effect on the average daily feed intake of meat ducks(P＞0.05).Adding Astragalus polysaccharides to the feed significantly increased the total serum protein content,copper zinc superoxide dismutase and glutathione peroxidase activity of meat ducks(P＜0.05);Adding 200 and 400 mg/kg Astragalus polysaccharides to the diet significantly increased the serum IgG content of meat ducks(P＜0.05);In addition,adding Astragalus polysaccharides to the diet did not significantly affect the serum albumin,urea nitrogen,IgA,and IgM contents of meat ducks(P＞0.05).Adding 200 mg/kg Astragalus polysaccharides to the diet significantly reduced the brightness,redness,and yellowness of breast muscles in meat ducks(P＜0.05).Adding 200 and 400 mg/kg Astragalus polysaccharides to the diet significantly reduced the dripping loss and shear strength of breast muscles in meat ducks(P＜0.05);In addition,the addition of Astragalus polysaccharides to the diet had no significant effect on the pH of breast muscles in meat ducks(P＞0.05).In summary,under the conditions of this experiment,the optimal amount of Astragalus polysaccharides added to the diet of meat ducks is 200 mg/kg.
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