摘要
取奥尼罗非鱼(Oreochromis niloticus×Oreochromis aureus)750尾,随机分为5组(每组150尾),分别饲喂添加0、50、100、150和200 mg/kg L-肉碱(L-carnitine)的饲料,以研究L-肉碱对奥尼罗非鱼生长、脂肪含量及血浆相关生化指标的影响,饲养周期为65 d。结果表明:饲料中肉碱添加量为150 mg/kg时,奥尼罗非鱼增重率和肥满度分别较对照组高19.91%和8.42%(P<0.05);饲料系数降低31.39%(P<0.05);肌肉脂肪含量降低14.39%(P>0.05);血浆中的胆固醇、甘油三酯含量分别降低9.82%(P>0.05)和65.43%(P<0.05);血浆中谷丙转氨酶和谷草转氨酶活性分别降低65.04%(P<0.05)和53.73%(P<0.05);血浆淀粉酶降低69.36%(P<0.05);血浆中尿素氮降低11.76%(P>0.05);白蛋白升高37.19%(P<0.05)。在本研究条件下,建议奥尼罗非鱼饲料中L-肉碱添加量为150 mg/kg。
This experiment was conducted to investigate the dietary L-carnitine requirement of juvenile tilapia（Oreochromis niloticus×O.aureus） through observing the growth of tilapia,analyzing fat content and blood biochemical indexes.750 juvenile tilapia with body weight of（0.30±0.01） g were randomly allotted to five groups,and were fed diets supplemented with different level L-carnitine（0,50,100,150 and 200 mg/kg） for 65d to investigate the effects of L-carnitine on growth,fat content and blood biochemical indexes.The results showed that when tilapia feed were added with 150 mg/kg L-carnitine,tilapia＇ WGR and CF were 19.91% and 8.42% higher than that of control group（P0.05） respectively;FRC was reduced 31.39%（P0.05）respectively;the amount of fat in muscle was reduced 14.39%（P0.05）;the contents of cholesterol（CHOL） and TG were reduced 9.82%（P0.05） and 65.43%（P0.05） respectively;the activities of ALT and AST in Tilapia＇s plasma were reduced 65.04%（P0.05）and 53.73%（P0.05）respectively;the activity of AMY was reduced 69.36%（P0.05）;the content of BUN in Tilapia＇s plasma was reduced 11.76%（P0.05）;the content of ALB in Tilapia＇s plasma was higher than that of control group（P0.05）.Therefore,under this research condition,it is suggested that the supplement of L-carnitine in diets of juvenile tilapia was the best at 150mg/kg.
出处
《上海海洋大学学报》
CAS
CSCD
北大核心
2010年第2期201-206,共6页
Journal of Shanghai Ocean University
基金
广西科学研究与技术开发计划项目(0992014-2)
广西壮族自治区科技攻关项目(0537008-ZE)
关键词
奥尼罗非鱼
L-肉碱
生长
脂肪含量
血浆生化指标
Oreochromis niloticus×Orechromis aureus
L-carnitine
growth
fat content
biochemical indexes of blood
