饲料中不同脂肪含量对草鱼稚鱼生长的影响

采用混合脂肪源（鱼肝油：豆油：猪油＝１：１：１）以不同脂肪含量梯度（３％，９％，１２％，１５％）配制成５种精制试验饲料，驿草鱼稚鱼做８周饲喂对比，综合分析其生长效率各参数。结果发现，草鱼稚鱼饲料中的适宜脂肪含量约为８．８％。分析表明，在满足鱼体蛋白需求的基础上，适当选取饲料原以提供组成平衡的必需脂肪酸，草鱼利用饲料脂肪的能力并不象以往认为的那么低下。

EFFECTS OF DIETARY LIPID CONTENT ON GROWTH OF JUVENILE GRASS CARP(CTENOPHARYNGODON IDELLUS)

Using mixed lipid (fish liver oil : soya bean oil: lard = 1 : 1 : 1 ) juvenile grass carp ( Ctenopharyngodon idellus ) were fed with purified diets containing different lipid contents (3 % .6 % , 9 %,12 % and 15 %) for 8 weeks . Fish fed with diets contaning 6 % and 9 % lipid had significantly (P<0 . 0 5) better growth perforniancet, . Results showed that the optimuni lipid requirement was about 8.8 % . It was suggested that, with appropriate kind of dietary lipid to supply balanced EFAs and enough protein, the ability of grass carp using lipid in diet would not be so low as thought before.