水生生物学报2012，Vol.36Issue(5)：826-836,11.DOI:10.3724/SP.J.1035.2012.00826
不同蛋白质和脂肪水平对1龄团头鲂生长性能和体组成的影响
EFFECTS OF DIFFERENT PROTEIN AND LIPID LEVELS ON THE GROWTH PERFORMANCE AND BODY COMPOSITION OF BLUNT SNOUT BREAM (MEGALOBRAMA AMBLYCEPHALA) YEARLINGS
摘要
Abstract
A 3×3 factorial design was used to determine effect of dietary protein and lipid levels on growth performance and body composition of blunt snout bream yearlings (average initial weight of 50.37±1.27 g). Nine experimental diets were formulated to contain three protein levels (25%, 30% and 35%), each of which had three lipid levels (3%, 6% and 9%). Fish were held in floating cages (2 mxl mxl m) and fed three times daily for 8 weeks. No interaction between dietary protein and lipid existed for growth performance and body composition (P>0.05). No significant difference (P>0.05) was observed in survival rate among all the treatments. Weight gain (WG), specific growth rate (SGR) and feed conversion ratio (FCR) were significantly influenced by both dietary protein (P<0.05) and lipid levels (P<0.05). WG and SGR of fish fed with 25% protein were significantly (P<0.05) lower than that of the other groups; whereas, the opposite was true for fish fed with 6% lipid (PO.01). Although the lowest FCR was found in fish fed with 35% protein and 6% lipid, no significant difference (P>0.05) was observed among the other treatments except for that offish fed with 25% protein + 3% lipid and 25% protein + 9% lipid. Protein efficiency ratio (PER) and nitrogen retention efficiency decreased significantly with increasing dietary protein levels (P<0.05). In addition, PER was significantly (P<0.05) affected by dietary lipid level with the highest observed in fish fed with 6% lipid. Energy retention efficiency increased significantly as dietary lipid levels increased (P<0.05). Condition factor improved significantly (P<0.05) as dietary protein and lipid levels both increased. Intraperitoneal fat ratio and hepatosomatic index increased significantly (P<0.05) as dietary lipid levels increased. No significant difference (P>0.05) was observed in body composition among all the treatments at different dietary protein levels. Moisture, lipid and energy contents of whole-body were significantly (P<0.01) affected by dietary lipid levels. Contrary to moisture content, lipid and energy contents of whole-body in-creased significantly (P<0.01) with increasing lipid level. Similar results were also observed in carcass and liver composition. The results of this study indicated that diet containing 30% protein and 6% lipid with a protein to energy ratio of 18.21 g/MJ was suitable for blunt snout bream yearlings.关键词
团头鲂/蛋白质/脂肪/生长性能/体组成Key words
Blunt snout bream (Megalobrama amblycephala)/ Protein/ Lipid/ Growth performance/ Body composition分类
农业科技引用本文复制引用
蒋阳阳,李向飞,刘文斌,吴阳,李贵锋,朱浩..不同蛋白质和脂肪水平对1龄团头鲂生长性能和体组成的影响[J].水生生物学报,2012,36(5):826-836,11.基金项目
现代农业产业技术体系建设专项-国家大宗淡水鱼类产业技术体系资金资助(项目编号:CARS-46-20) （项目编号:CARS-46-20）
农业公益性行业科研专项-水产养殖动物营养需求与高效配合饲料开发(项目编号:201003020)资助 （项目编号:201003020）
