To investigate the effects of Astragalus polysaccharides on the growth,digestive function,and body indicators of Micropterus salmoides,600 M.salmoides were selected in this study,and a control group(fed with basic diet,FB),treatment group 1(FB+500mg/kg Astragalus polysaccharides),treatment group 2(FB+1000 mg/kg Astragalus polysaccharides),and treatment group 3(FB+1500 mg/kg Astragalus polysaccharides)were set up for a cultivation period of 56 days.The results showed that different amounts of Astragalus polysaccharides added were beneficial for improving the weight gain rate of M.salmoides(P＜0.05)and treatment group 2 showed the highest weight gain rate;The treatment groups showed significant decrease in feed coefficient compared to the control group(P＜0.05),and the feed coefficient of treatment group 2 was the lowest.Different amounts of Astragalus polysaccharides added are beneficial for improving the plumpness,organ to body ratio,and liver to body ratio of M.salmoides(P＜0.05);The protease,amylase,and lipase activities,apparent digestibility,and protein apparent digestibility in the stomach and intestines of each treatment group were higher than those in the control group(P＜0.05).Moreover,with the increase of astragalus polysaccharide addition,the protease,amylase,lipase activities,apparent digestibility,and protein apparent digestibility in the stomach and intestines showed a trend of first increasing and then decreasing,all reaching their highest levels at a dosage of 1000 mg/kg.It is believed that adding an appropriate amount of Astragalus polysaccharides to the diet can improve the growth performance and body indicators of M.salmoides.
Micropterus salmoidesastragalus polysaccharidesphysical indicatorsdigestive function
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