配合饲料品质对鲤鱼体内必需氨基酸沉积率的影响

Effect of Formulated Feed Quality on the Deposit Rate of Essential Amino Acid in Common Carp

采用２×３单因子有重复方法设计网箱饲养鲤鱼种的试验。Ａ、Ｂ两种配合饲料中粗蛋白含量基本相同，分别为１８．１７％和１７．８６％．必需氨基酸（ＥＡＡ）含量也大体相等，分别为７．３９％和７．３１％。Ａ饲料中动物蛋白源为１０％的鱼粉，Ｂ饲料中为５％的羽毛粉＋５％的鱼粉。试验结果表明：鲤鱼体内赖氨酸的沉积率最高，分别达７３．８８％和７９．５７％；组氨酸次之，分别为６０．２２％和６１．２８％。缬氨酸、蛋氨酸、蛋氨酸＋胱氨酸、苯丙氨酸＋酪氨酸的沉积率因配合饲料的品质不同呈显著性差异（Ｐ＜０．０５）。饲料品质越好，必需氨基酸沉积率越高。

Common carp fingerlings cage culture experiment was designed with 2×3 one factor and duplicated method. The contents of protein and essential amino acid in two kinds of formulated feed were almost tile same,i. e. 18. 17% and 17. 86%, 7. 39% and 7. 31 % respectively. The animal protein in Feed A was originated from fish meal(10%),that in Feed B was from both feather meal(5% ) and fish meal(5% ). The results showed that the deposit rate of Lys in common carp was the highest, 73. 88% and 79. 57% respectively. Fol lowed by that of His.,being 60. 22% and 61. 28% respectively. The deposit rates of Val,Met, Met +Cys and Phe+Tyr were significantly different (P<0.05),varied with the different quality of the feeds. The better the feed quality,the higher the deposit rate of essentialamino acid.