蛋氨酸对幼建鲤生长及消化吸收功能的影响

选择体重为(12.34±0.02)g健康建鲤864尾,平均分成6组,每组设3个重复,每个重复48尾。6个处理组分别饲喂蛋氨酸水平为0.39%、0.70%、1.00%、1.30%、1.60%和1.90%的饲料,试验期60 d。结果表明:饲料中蛋氨酸水平显著(P<0.05)或极显著(P<0.01)影响幼建鲤增重、摄食量、饲料系数、蛋白、脂肪和灰分沉积率;饲料蛋氨酸水平对组织谷-草转氨酶活力、血氨浓度也有极显著影响(P<0.01);饲料蛋氨酸水平显著(P<0.05)或极显著(P<0.01)影响幼建鲤肝胰脏重、肝胰脏蛋白含量、肠重、肠长、肠蛋白含量、肠皱襞高度、肠道和肝胰脏蛋白酶活力、脂肪酶活力、肠碱性磷酸酶活力、肠Na+,K+-ATPase活力。试验结果说明,蛋氨酸可促进幼建鲤消化器官生长发育、提高消化酶活性、增强吸收能力、从而提高生产性能。

Effect of Methionine on Digestive Function of Juvenile Jian Carp(Cyprinus carpio Var. Jian)

This experiment was conducted to study the effect of methionine on digestive function of juvenile Jian Carp(Cyprinus carpio Var.Jian).A total of 864 juvenile Jian carps were randomly allocated to 6 groups fed semi-purified diets containing methionine 0.39%,0.70%,1.00%,1.30%,1.60%,1.90%,respectively,for 65 d.The results indicated that methionine level significantly affected weight gain,feed intake,feed conversion efficiency,protein retention ratio,lipid retention ratio,ash retention ratio.Methionine level significantly affected plasma albumin content,glutathione reductase,ammonia content,tissue GOT activity,and hepatopancreas weight,intestine weight,intestine length,intestine and hepatopancreas protein lipase activity,trypsin activity and chymotrypsin activity,intestinal folds height,intestinal alkaline phosphatase and Na +,K +-ATPase activity.In summary,growth performance was increased through adding methionine in the diet.Growth rate was increased by increasing feed intake and feed conversion efficiency.