加州鲈常用饲料原料的可利用氨基酸研究

本试验用Cr2O3 间接测定法测定了加州鲈对秘鲁鱼粉、国产鱼粉、豆粕、麦麸、次粉、酵母粉等6种常用饲料中蛋白质和氨基酸的表观消化率。结果表明 ,加州鲈对这6种原料的蛋白质消化率和总氨基酸消化率分别为 :86.09 %和90.12 %、84.12和90.00 %、76.86 %和82.85 %、61.22 %和75.45 %、67.49 %和76.27 %、72.29和81.30 %。动物性原料的消化率均高于植物性原料。经分析 ,蛋白质和氨基酸的消化率与原料中的粗纤维含量呈负的直线相关系(蛋白质消化率与粗纤维含量rp = -0.9488,P<0.01;氨基酸消化率与粗纤维含量rA = -0.9133,P<0.05)。

AVAILABLE AMINO ACIDS OF COMMON FEED INGREDIENTS FOR LARGEMOUTH BASS(MICROPTER US SALMOIDES)

The apparent digestibilities of protein and amino acids in six common feed ingredients for largemouth bass were determined by the indirect method using Cr2O3 as a marker.The protein and amino acid digestibilities of Peru fishmeal,China fishmeal ,soybean meal(sol),yeast,wheat bran and middlings were 86.09% and 90.12%,84.12% and 90.00%,76.86% and 82.85%,72.29% and 81.30%,61.22% and 75.45%,67.49% and 76.27%,respectively.It was found that there was negative correlation of digestibility of protein(rp=-0.9488,P<0.01) and amino acid (rA=-0.9133,P<0.05)with content of crude fiber in feed.