The effect of adding astragalus polysaccharides to the diet on the digestive function,growth,and body indicators of Micropterus salmoides
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
NETL
NSTL
万方数据
