添加不同构型肉碱对对虾生长和体成分含量的影响

Effects of different carnitine isomers on growth, feed utilization and body composition of shrimp

研究了在饲料中添加不同构型肉碱对斑节对虾和凡纳对虾生长、饲料利用以及虾体组成成分的影响。在斑节对虾基础饲料(对照组)中分别添加L 肉碱(100、200、300mg/kg),DL 肉碱(100、200、300mg/kg);在凡纳对虾基础饲料(对照组)中添加L 肉碱,添加量分别为50mg/kg、100mg/kg、200mg/kg和300mg/kg。实验用斑节对虾和凡纳对虾体重平均为0.85g,每个处理设3个重复,每个养殖单元放养对虾40尾,实验为期1个月。试验结果表明,在饲料中添加L 肉碱或DL 肉碱,对斑节对虾和凡纳对虾的生长以及饲料利用均无显著影响(P>0.05);在斑节对虾的试验中添加300mg/kg的L 肉碱或DL 肉碱使虾体脂肪含量由4.69%(对照组)降低为3.47%和3.55%(P<0.05)。在凡纳对虾的试验中,添加L 肉碱200mg/kg、300mg/kg组,虾体脂肪含量由7.09%(对照组)降低到6.04%和5.72%(P<0.05)。

Two growth trials were conducted to investigate the effects of DL-carnitine and L-carnitine on the growth, feed utilization and body composition of shrimp Penaeus monodon and Penaeus vannamei. DL-carnitine and L-carnitine were added with different supplement doses (0, 100mg/kg, 200mg/kg, 300mg/kg diet) in the shrimp Penaeus monodon and L-carnitine with different supplement doses (0, 50mg/kg, 100mg/kg, 200mg/kg, 300mg/kg diet) in the diet of shrimp of Penaeus vannamei. Triplicate groups of 40 shrimp (initial body weight of 0.85g) were fed by hand with experimental diets, the growth trial lasted one month. The results showed that the supplementation of L-carnitine or DL-carnitine can not increase the growth rate and improve feed utilization of Penaeus monodon and Penaeus vannamei (P>0.05). In the trial of Penaeus monodon, the lipid content of whole body decreased significantly from 4.69% (control group) to 3.47% and 3.55% respectively with supplementation of 300mg/kg DL-carnitine or L-carnitine (P<0.05). In the experiment of Penaeus vannamei, with the supplementation of 200mg/kg and 300mg/kg of L-carnitine, the lipid contents of whole body were decreased significantly from 7.09% (control group) to 6.04% and 5.72% respectively (P<0.05).