Effects of Dietary Carbohydrate-to-Lipid Ratio on the Growth Performance and Feed Utilization of Juvenile Turbot(Scophthalmus maximus)  

作　　者：MIAO Shuyan NIE Qin MIAO Huijun ZHANG Wenbing MAI Kangsen 

机构地区：[1]The Key Laboratory of Aquaculture Nutrition and Feed of Ministry of Agriculture, The Key Laboratoryof Mariculture of Ministry of Education, Ocean University of China, Qingdao 266003, P. R. China [2]College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, P. R. China

出　　处：《Journal of Ocean University of China》2016年第4期660-666,共7页中国海洋大学学报（英文版）

基　　金：financially supported by the National Basic Research Program (973 program, No.2014CB 138600);the National Natural Science Foundation of China (No.31072219)

摘　　要：A 9-week feeding trial was conducted to investigate the effects of dietary carbohydrate to lipid ratio(CHO:LIP) on the growth performance and feed utilization of juvenile turbot Scophthalmus maximus(initial body weight 8.75 g ± 0.04 g). Four isonitrogenous and isoenergetic low protein level(39%) diets were formulated with increasing ratios of dietary carbohydrate to lipid(2:18, 6:18, 18:12 and 28:6). A high protein level(50%) diet with the 2:12 ratio of carbohydrate to lipid was used as the control. Results showed that the survival rate, contents of moisture, crude protein and ash in muscle were not significantly affected by dietary treatments. With the dietary CHO:LIP ratio increased from 2:18 to 18:12, weight gain rate significantly increased(P < 0.05). Higher dietary CHO:LIP ratio(28:6) resulted in the significantly decreased weight gain rate(P < 0.05). Meanwhile, this treatment also resulted in the highest daily feed intake and liver glycogen content, as well as the lowest feed efficiency(P < 0.05). Muscle glycogen content in fish fed the diet with 2:12 or 2:18 CHO:LIP ratio was significantly lower than those fed with the other three diets(P < 0.05). The present results confirmed that the juvenile turbot can utilize carbohydrate. Furthermore, the appropriate ratio of dietary carbohydrate to lipid was important to the growth and feed utilization of turbot. The proper CHO:LIP ratio based on the growth performance in the present study was determined to be 18:12 when the dietary protein level was 39%.A 9-week feeding trial was conducted to investigate the effects of dietary carbohydrate to lipid ratio（CHO：LIP） on the growth performance and feed utilization of juvenile turbot Scophthalmus maximus（initial body weight 8.75 g ± 0.04 g）. Four isonitrogenous and isoenergetic low protein level（39%） diets were formulated with increasing ratios of dietary carbohydrate to lipid（2：18, 6：18, 18：12 and 28：6）. A high protein level（50%） diet with the 2：12 ratio of carbohydrate to lipid was used as the control. Results showed that the survival rate, contents of moisture, crude protein and ash in muscle were not significantly affected by dietary treatments. With the dietary CHO：LIP ratio increased from 2：18 to 18：12, weight gain rate significantly increased（P 〈 0.05）. Higher dietary CHO：LIP ratio（28：6） resulted in the significantly decreased weight gain rate（P 〈 0.05）. Meanwhile, this treatment also resulted in the highest daily feed intake and liver glycogen content, as well as the lowest feed efficiency（P 〈 0.05）. Muscle glycogen content in fish fed the diet with 2：12 or 2：18 CHO：LIP ratio was significantly lower than those fed with the other three diets（P 〈 0.05）. The present results confirmed that the juvenile turbot can utilize carbohydrate. Furthermore, the appropriate ratio of dietary carbohydrate to lipid was important to the growth and feed utilization of turbot. The proper CHO：LIP ratio based on the growth performance in the present study was determined to be 18：12 when the dietary protein level was 39%.

关 键 词：Scophthalmus juvenile Lipid carbohydrate dietary glycogen dextrin lipid Paralichthys intake 

分 类 号：S965[农业科学—水产养殖]