Performance Enhancing Effect of Rare Earth Elements in Common Carp (Cyprinus carpio)
来源期刊：Journal of Rare Earths2006年第S2期
论文作者：江振莹 贾志海
文章页码：324 - 327
摘 要：A feeding study was performed to investigate possible performance enhancing effects of rare earth elements （RE） in common carp, as well as their influence on the accumulation of RE in the organs of common carp treated with a RE diet for a longer time period. Four hundred and fifty crossbred common carps were allotted to five dietary treatments: a control group and the RE-treated group which was supplemented with 100, 200, 300 and 400 of an RE mixture per kg feed. The experimental period lasted 60 d. It is found that in comparison with the control group, the RE group which is supplemented with 300 mg·kg-1, has a better body weight gain of 21.4%（p<0.01）; the RE group also has a better feed conversion ratio of 10.0%（p<0.05）. The accumulation rate of RE in the muscle, liver and kidneys is very low after feeding the RE diet for 60 d. The RE contents in the muscle, scale, heart and hepatopancreas, bone and brain are: heart and hepatopancreas>bone>scale>brain>muscle. There are no correlation between the content of RE in diets or experiment time and that in the muscles, scale, heart and hepatopancreas, bone and brain. The study indicates the possibility of using rare earth elements as safe and inexpensive alternative performance enhancers for carp production.
江振莹，贾志海
摘 要：A feeding study was performed to investigate possible performance enhancing effects of rare earth elements （RE） in common carp, as well as their influence on the accumulation of RE in the organs of common carp treated with a RE diet for a longer time period. Four hundred and fifty crossbred common carps were allotted to five dietary treatments: a control group and the RE-treated group which was supplemented with 100, 200, 300 and 400 of an RE mixture per kg feed. The experimental period lasted 60 d. It is found that in comparison with the control group, the RE group which is supplemented with 300 mg·kg-1, has a better body weight gain of 21.4%（p<0.01）; the RE group also has a better feed conversion ratio of 10.0%（p<0.05）. The accumulation rate of RE in the muscle, liver and kidneys is very low after feeding the RE diet for 60 d. The RE contents in the muscle, scale, heart and hepatopancreas, bone and brain are: heart and hepatopancreas>bone>scale>brain>muscle. There are no correlation between the content of RE in diets or experiment time and that in the muscles, scale, heart and hepatopancreas, bone and brain. The study indicates the possibility of using rare earth elements as safe and inexpensive alternative performance enhancers for carp production.
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