不同蛋白水平的膨化菜籽配合饲料对斑点叉尾鮰生长的影响

Effect of expanded rapeseed dietary with different protein levels on growth in Channel catfish(Ictalums punetaus)

文章旨在研究不同蛋白水平和膨化菜籽添加量对斑点叉尾鮰生长性能、脏器指数及肌肉营养成分的影响。试验选取平均体重为(8.02±0.009)g的健康斑点叉尾鮰600尾,随机分为10组,每组3个重复,每个重复20尾。试验基础饲料以鱼粉、豆粕(菜粕、棉粕)为蛋白源,设(28%、32%、36%)三个水平,以膨化菜籽为脂肪源,设(7%、11%、15%)三个添加水平。试验结果表明:①膨化菜籽组与对照组相比,当饲料粗蛋白含量为32%,膨化菜籽添加量为15%时,对斑点叉尾鮰促生长效果最好;②膨化菜籽组与对照组相比,对斑点叉尾鮰脏器指数及斑点叉尾鮰肌肉中水分、粗蛋白和粗脂肪指标均没有显著性影响(P>0.05)。

The current study was performed to examine the effects of different protein and expanded rapeseed levels on growth performance, organ index and muscle nutrition facts in Channel Catfish.A feeding trial was conducted by using the experimental fish of six hundreds（the initial body weight was 8.02 g）, were randomly allotted to 10 treatments with 3 replicates for 20 Channel Catfishs each.Dietary was made of fish meal,soybean meal,rapeseed meal and cottonseed meal as protein source,expanded rapeseed as fat source,protein and fat levels of experimental feed were （28%, 32%, 36%, and 7%, 11%, 15%, respectively.The results of rearing trial showed that： The expanded rapeseed group com- pared with the control group,based on calculating weight gain and feed conversion rate,the optimum protein level was 32% and the optimum fat level was 15%; The expanded rapeseed group compared with the control group,the percentang of organ index,moisture,protein and fat of muscle had no signifi- cant differences（P〉0.05）.