| 摘要: |
| 通过2个试验研究了饲料蛋白质在鸡消化道食糜中肽氨基酸含量与氨基酸消化率的关系。试验1研究了3月龄黄羽肉鸡对鱼粉、豆粕、棉籽粕、菜籽粕的氨基酸利用率。试验结果，几种蛋白质饲料的氨基酸消化率分别为：鱼粉0．92，豆粕0．87，棉粕0．75，菜粕0．76。试验2研究了鱼粉、豆粕、棉籽粕、菜籽粕在鸡消化道各段（胃、十二指肠、空肠）食糜中肽氨基酸（PAA）的含量，并探讨了氨基酸消化率与肽氨基酸含量之间是否存在相关性。试验结果，不同蛋白质饲料在胃肠道食糜中肽氨基酸含量存在着很大差异 ，鱼粉最高，豆粕其次，棉籽与菜籽最低。将氨基酸消化率与肽氨基酸含量进行相关分析表明：二者之间存在明显相关性，其中以6h时间点的空肠段肽氨基酸含量与氨基酸消化率之间相关最高，R^2=0.98。 |
| 关键词: 饲料蛋白质 鸡 消化道食糜 肽氨基酸含量 氨基酸消化率 |
| DOI： |
| 修订日期：2001-04-05 |
| 基金项目:中华农业科教-人才基金资助项目 |
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| Relationship Between Amino Acid Availability and Hydrolyzed Peptide Quantity in Poultry Protein Feeds |
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| Abstract: |
| This study was to investigate the relationship between amino acid availability and the hydrolyzed peptide quantity of poultry protein feed. In experiment 1, 25 three-month yellow-feather chicks were used to determine the amino acid availability of fish meal, soybean meal, cottonseed meal, rapeseed meal. The experiment result showed that the amino acid availability were 0. 92, 0. 87, 0. 75, 0. 76 for fish meal, soybean meal, cottonseed meal, rapeseed meal. In experiment 2, we determined the peptide amino acid (PAA) quantity in different protein, and studied the relationship between amino acid availability and peptide amino acid quantity. The result showed that the peptide amino acid quantity varied with different protein. There was a highest quantity of peptide amino acids with fish meal, followed by soybean meal, cottonseed meal and rapeseed meal . The more PAA quantity was hydrolyzed from the protein, the higher amino acid utilization ratio of the protein was. There was a strong relationship between the PAA quantity and amino acid availiability, and the highest relationship occurred between the PAA quantity hydrolyzed from the jejunum chyme collected after 6 hours and amino acid utilization ratio, R2 = 0. 98. |
| Key words: chick,peptide amino acid,amino acid availability |
