赵静怡,杨欣,徐奇友

• 1:湖州师范学院生命科学学院水生动物繁育与营养国家地方联合工程实验室浙江省水生生物资源养护与开发技术研究重点实验室

摘要(Abstract)：

试验旨在研究不同水平包膜蛋氨酸（Methionine,Met）对松浦镜鲤（Cyprinus carpio Songpu）幼鱼生长性能、肠道消化酶活性、体组成和肌肉氨基酸组成的影响。选取松浦镜鲤幼鱼360尾，初始体重（8.25±0.78）g，随机分成4组，每组3个重复，每个重复30尾，放养在12个养殖桶中。对照组饲喂添加0.4%晶体Met的基础饲料，试验组分别饲喂0(B0组)、0.2%(B2组)、0.4%(B4组)的包膜Met水平的等氮等能饲料，试验期8周。结果表明：(1)与对照组相比，B0组的增重率和蛋白质效率显著降低（P<0.05），饲料系数显著增加（P<0.05），特定生长率没有显著性差异（P>0.05）；与对照组相比，B2、B4组特定生长率、增重率、蛋白质效率和饲料系数均差异不显著（P>0.05）。(2)各组间鱼体水分、粗脂肪、粗灰分含量均无显著差异（P>0.05）；与对照组相比，B2组的粗蛋白含量显著降低（P<0.05）,B0、B4组无显著差异（P>0.05）;B4组的鱼体粗蛋白含量显著高于B0组和B2组（P<0.05）。(3)各组间的胰蛋白酶活性均无显著差异（P>0.05）。B0组淀粉酶活性显著高于对照组和B4组（P<0.05）;B4组淀粉酶活性与对照组相比差异不显著（P>0.05）,B4组的脂肪酶活性显著高于对照组（P<0.05）。(4)各组间的肌肉必需氨基酸、非必需氨基酸、总氨基酸含量和必需氨基酸指数差异不显著（P>0.05）。说明饲料中添加晶体Met和包膜Met对鲤鱼具有促生长的作用。综合生长性能、消化酶活性及肌肉氨基酸含量分析得出，包膜Met添加量为0.2%可达到晶体Met 0.4%的效果。

关键词(KeyWords)： 包膜蛋氨酸;鲤鱼;生长性能;消化酶活性;肌肉氨基酸

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目[31972800]

作者(Author): 赵静怡,杨欣,徐奇友

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