| 去盲肠和未去盲肠公鸡测定饲料氨基酸消化率的比较研究 |
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| 引用本文： | 计成,许万根,戎易,S. E. Schereumann.去盲肠和未去盲肠公鸡测定饲料氨基酸消化率的比较研究[J].动物营养学报,1992(2). |
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| 作者姓名： | 计成 许万根 戎易 S. E. Schereumann |
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| 作者单位： | 北京农业大学畜牧系,北京农业大学畜牧系,北京农业大学畜牧系,Hoest AG Germany,北京,北京中国农科院畜牧研究所,北京 |
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| 摘 要： | 应用Sibbald“TME”方法,比较了去盲肠和未去盲肠公鸡对饲料氨基酸的消化率。试验测定了10种饲料的去盲肠和未去盲肠公鸡的氨基酸消化率。结果表明,未去盲肠鸡对10种饲料的氨基酸表观和真消化率均高于去盲肠鸡。轻度受热鱼粉、重度受热鱼粉、脱毒棉籽饼、未脱毒棉籽饼和豆饼的表观氨基酸消化率在去盲肠鸡和未去盲肠鸡之间存在显著差异(P<0.05),未受热鱼粉和芝麻饼的表观氨基酸消化率在去盲肠鸡和未去盲肠鸡之间不存在显著差异(P>0.05)。轻度受热鱼粉、重度受热鱼粉、豆饼的真氨基酸消化率在去盲肠鸡和未去盲肠鸡之间存在显著差异(P<0.05);未受热鱼粉、脱毒棉籽饼、未脱毒棉籽饼和芝麻粕的真氨基酸消化率在去盲肠鸡和未去盲肠鸡之间不存在显著差异(P>0.05)。去盲肠鸡内源氨基酸排出量显著高于未去盲肠鸡(P>0.05)。微生物对未消化食糜中的肽类、氨基酸具有降解作用。
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| 关 键 词： | 鸡饲料 氨基酸利用率 盲肠微生物 |
DETERMINATION OF AMINO ACID DIGESTIBILITY OF FEEDSTUFFS FOR POULTRY WITH INTACT AND CAECECTOMIZED COCKERELS |
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| Ji Cheng Xu Wangen Rong Yi S. E. Scheuermann.DETERMINATION OF AMINO ACID DIGESTIBILITY OF FEEDSTUFFS FOR POULTRY WITH INTACT AND CAECECTOMIZED COCKERELS[J].Acta Zoonutrimenta Sinica,1992(2). |
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| Authors: | Ji Cheng Xu Wangen Rong Yi S E Scheuermann |
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| Institution: | Ji Cheng Xu Wangen* Rong Yi S. E. Scheuermann** |
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| Abstract: | A comparative evaluation of the digestibility of feedstuffs for poultry was carried out with intact and caecectomized cockerels, using Sibbald "TME" method. The digestibilities of 10 feedstuffs were determined with intact and caecectomized cockerels. The apparent and true digestibilities of the test feedstuffs determined with intact cockerels were higher than those determined with caecectomized cockerels. There were significant differences of the apparent digestibility of lightly heatdamaged fish meal, heavily heat-damaged fishmeal, soybeal meal, cottonseed meal, and cottonseed meal (treated with FeSO_4 and alkaline) between intact and caecectomized cockerels (P<0.05), but not for fishmeal (normal) and sesame meal (P>0.05). When corrected for the endogenous amino acids excreted, the true digestibility of lightly heat-damaged fishmeal, heavily heat-damaged fishmeal and soybean meal had significant differences between the two kinds of cockerels (P<0.05), but not for the others (P>0.05) The significant differences of amino acid digestibilities between intact and caecectomized cockerels showed the marked effect of microbial degradation of undigested amino acids and peptides from the small intestine. The excretion of endogenous amino acids in intact were significanly lower than those in eaecectomized birds. This may explain the differences in apparent digestibilities, but not in the true digestibilites. The degradation of amino acids and peptides from the ileal digesta by microbials in the caecum was discussed. Based on the observation of the differrences in endogenous amino acid excretions and the differences in the measured true digestibilities, the controversial question concerning the priority of microbial degradation on exogenous and endogenous amino acids was objectively analized. |
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| Keywords: | Poultry feedstuffs Amino acid digestibility Caecum |
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