Abstract：In this study, feed additives of astragalus polysaccharide, Eucommia ulmoides, yeast cell wall, bile acid and L-carnitine were used to study the effects of the new compound feed on the growth performance, serum biochemical indices and liver antioxidant capacity of largemouth bass Micropterus salmoides for eight weeks. A total of 270 largemouth bass juveniles with average body weight of (50.42±6.43) g were randomly divided into blank control group (basic feed), test group (basic feed + 0.01% compound feed additive), and positive control group (functional feed) and fed different diets, with three replicates in each treatment. The results showed that the body weight gain rate and specific growth rate were shown to be higher in test group and positive control group than those in blank control group, and the difference was significant in test group(P<0.05); compared with blank control group, the hepatosomatic index and crude fat content in liver in test group were significantly lower(P<0.05), while the survival rate, condition factor and nutritional compositions of whole fish and muscle were not significantly different among groups(P>0.05); the activities of serum glutamic oxaloacetic transaminase and alanine aminotransferase were significantly higher in test group and positive control group than those in blank control group (P<0.05).The activities of superoxide dismutase and catalase in liver in test group were significantly higher than those in blank control group and positive control group(P<0.05), and the concentration of malondialdehyde in test group was significantly lower than that in blank control group(P<0.05). The findings indicated that the appropriate amount of compound feed additives effectively promoted the growth of largemouth bass, reduced the liver fat content and improved the antioxidant capacity of tissues.
张奇, 杨军, 廖伟坚, 李自金, 郑连春, 何绪刚. 复合型饲料添加剂对大口黑鲈生长和健康状况的影响[J]. 水产科学, 2022, 41(3): 431-437.
ZHANG Qi, YANG Jun, LIAO Weijian, LI Zijin, ZHENG Lianchun, HE Xugang. Effect of Composite Feed Additives on Growth and Health Status of Largemouth Bass Micropterus salmoides. Fisheries Science, 2022, 41(3): 431-437.
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2022, Vol. 41 
