摘要
为了探讨不同脂肪源对异育银鲫生长、消化率和体成分的影响,在基础饲料中分别添加4%的鱼油、豆油、猪油、花生油和混合油(鱼油∶豆油∶猪油=3∶4∶3)制成5种等氮试验饲料,饲喂均重为(6.04±0.05)g的异育银鲫60d。结果表明,混合油组的增重率、特定生长率(SGR)显著高于鱼油组和猪油组(P<0.05),但与其他组无显著差异(P>0.05);蛋白质效率(PER)、饲料系数(FCR)各组间均无显著性差异(P>0.05);豆油组的肠体比显著高于鱼油组和猪油组(P<0.05);猪油组的肝体指数(HSI)显著高于鱼油组(P<0.05),猪油组的内脏指数显著高于混合油组(P<0.05);不同脂肪源对肥满度的影响不显著(P>0.05);鱼体肌肉中水分、粗蛋白、粗脂肪、粗灰分和磷各组间差异不显著(P>0.05);猪油组肝脏中粗脂肪含量显著高于鱼油组和花生油组(P<0.05);肝脏中粗蛋白鱼油组和豆油组显著高于猪油组和花生油组(P<0.05);猪油组粗蛋白和粗脂肪的表观消化率显著低于其他各组(P<0.05)。研究结果显示,当豆油和花生油单独添加时,与添加鱼油组表现出相似的生长性能、表观消化率和体成分,而单独添加猪油,鱼体对营养物质的消化率不如其他油脂。建议生产上鱼油、豆油和猪油混合添加,使得油脂中各种脂肪酸的比例适中,不但节约了饲料成本,而且异育银鲫表现出较好的生长效果。
The objective of this study was to determine the impact of dietary lipid sources on growth,body composition and apparent digestibility of Carassius auratus gibelio[initial weight： （ 6. 04 ± 0. 05） g]. 5 experimental diets were formulated to contain 4% lipid originated from fish oil,soybean oil,lard,peanut oil and mixed oil（ fish oil：soybean oil：lard,3：4：3） ,respectively. The feeding trial lasted for 60 days. Weight gain and protein efficiency ratio（ PER） of fish fed mixed oil was significantly（ P 0. 05） higher than that of fish fed fish oil and lard,but not different from that of other groups. No significant difference was found among all treatments in specific growth rate（ SGR） and feed conversion ratio （ FCR） . Mesenteric length/ length of fish fed soybean oil was significantly （ P 0. 05） higher than that of fish fed fish oil and lard. Hepatosomatic index（ HSI） of fish fed lard was significantly（ P 0. 05） higher than that of fish fed fish oil. However,visceralsomatic index（ VSI） of fish fed lard was significantly（ P 0. 05） higher than that of fish fed mixed oil. However,no significant difference was observed among all treatments in muscle moisture,protein, lipid,ash and phosphorus content. Liver lipid content of fish fed lard was significantly（ P 0. 05） higher than that of fish fed fish oil and peanut oil,and liver protein content of fish fed fish oil and soybean oil were significantly （ P 0. 05 ） higher than that of fish fed lard and peanut oil. Apparent protein and lipid digestibility of fish fed lard were significantly（ P 0. 05） lower than that of other groups. The results of this study there was no significant difference on growth performance and body composition of C. auratus gibelio when soybean oil,peanut oil and fish oil were used solely. It also suggested that fish oil,soybean oil and lard could be mixed together as a better oil source for C. auratus gibelio,which not only reduced feed costs but also enhanced fish growth.
出处
《水产学报》
CAS
CSCD
北大核心
2010年第9期1439-1446,共8页
Journal of Fisheries of China
基金
江苏省科技厅农业科技支撑项目(BE2009373)
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(nycytx-49-21)
关键词
异育银鲫
脂肪源
生长
表观消化率
体成分
Carassius auratus gibelio
dietary lipid source
growth performance
apparent digestibility
body composition
