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1.
选择18周龄黄羽肉鸡,去盲肠成年公鸡和正常成年公鸡各9只,探讨去盲肠与正常黄羽肉鸡对大米粉氨基酸消化率的影响。结果表明,大米粉中氨基酸表观消化率去盲肠鸡普遍高于正常鸡,丙氨酸、亮氨酸和赖氨酸差异显著(P<0.05);大米粉中氨基酸的真消化率亦普遍表现为去盲肠鸡高于正常鸡,丙氨酸差异显著(P<0.05),酪氨酸差异极显著(P<0.01)。大米粉的总氨基酸表观消化率和真消化率在两种试鸡间差异不显著(P>0.05)。去盲肠鸡的内源氨基酸排泄量大多数测值高于正常鸡,但差异不显著(P>0.05)。本试验建议用正常鸡的测定值表示黄羽肉鸡对大米粉的氨基酸消化率。 相似文献
2.
试验旨在测定大米粉氨基酸消化率的同时,探讨去盲肠与正常黄羽肉鸡对大米粉氨基酸消化率的影响。结果表明:大米粉中氨基酸表观消化率去盲肠鸡普遍高于正常鸡,丙氨酸、亮氨酸和赖氨酸差异显著(P<0.05);大米粉中氨基酸的真消化率亦普遍表现为去盲肠鸡高于正常鸡,丙氨酸差异显著(P<0.05),酪氨酸差异极显著(P<0.01)。大米粉的总氨基酸表观消化率和真消化率在两种试鸡间差异不显著(P>0.05)。去盲肠鸡的内源氨基酸排泄量大多数测值高于正常鸡,但差异不显著(P>0.05)。本试验建议用正常鸡的测定值表示黄羽肉鸡对大米粉的氨基酸消化率。 相似文献
3.
应用正常及去盲肠成年白来航公鸡各20只,比较了鱼粉、豆饼、菜籽饼、棉仁饼的氨基酸利用率。结果表明:鱼粉和棉仁饼的17种氨基酸的表观及真利用率在两组问差异不显著;豆饼必需氨基酸表观氨基酸利用率中有6种氨基酸两组间差异显著成极显著,真利用率中只有2种氨基酸两组间差异显著;菜籽饼必需氨基酸表观氨基酸利用率有2种氨基酸两组间差异显著,真利用率两组问差异不显著。从鸡的正常生理角度考虑,作者认为:用正常试验鸡并以氨基酸真利用率为指标,更能客观地反映常用蛋白质饲料的氨基酸利用率。 相似文献
4.
分别用24只去盲肠和未去盲肠健康公鸡,测定了花生粕、胡麻粕和芝麻粕的氨基酸消化率。结果表明:去盲肠鸡内源氨基酸排泄量显著高于未去盲肠鸡(P<0.05);在花生粕中,胱氨酸、赖氨酸、天冬氨酸和谷氨酸的AAD未去盲肠鸡显著高于去盲肠鸡(P<0.05);在胡麻粕和芝麻粕中,除酪氨酸和脯氨酸外,其它各种氨基酸及16种氨基酸总和的AAAD和TAAD未去盲肠鸡显著高于去盲肠鸡(P<0.05)。鸡盲肠微生物对内源及饲料中未消化蛋白质、多肽及氨基酸具有分解作用,干扰饲料AAAD和TAAD测定。对于不易消化、氨基酸含量相对不平衡的低品质蛋白质饲料干扰尤其严重。在测定的3种饼粕中,花生粕氨基酸消化率最高,胡麻粕次之。过度热处理的芝麻粕氨基酸平均消化率为47.3%,赖氨酸消化率为21.7%。 相似文献
5.
本研究应用Sibbald强饲快速法,测定并比较了去盲肠和未去盲肠公鸡对3种蛋白质饲料氨基酸的代谢率,结果表明,未去盲肠鸡对3种蛋白质饲料的氨基酸表观和真代谢率均高于去盲肠鸡(P〈0.05)。豆粕的氨基酸代谢率均高于其它2种蛋白质饲料(P〈0.05),从总体来看,去盲肠和去盲肠公鸡豆粕的蛋氨酸(MET),酪氨酸(TYR),组氨酸(HIS)精氨酸(ARG),胱氨酸(CYS)等氨基酸的表观及真代谢率差异 相似文献
6.
本研究以去盲肠鸡和正常鸡按Sibbald的“TME”方法分别测定了皮大麦、蒸煮血粉、发酵血粉、水解复合蛋白、热喷胶原蛋白、国产鱼粉及其配合饲料J1和J2的氨基酸表观消化率(AAAD)和真消化率(TAAD)。并对两种试鸡所测上述饲料原料氨基酸的消化率及其可加性作比较。结果表明:(1)6种饲料原料的某些氨基酸表观消化率和真消化率,去盲肠鸡和正常鸡测值间存在显著差异(P<0.05)。(2)去盲肠鸡内源氨基酸排出量显著高于正常鸡(P<0.05)。(3)在以非常规蛋白质为主要补充蛋白质源时,以去盲肠鸡测得的真可消化氨基酸具有最好的可加性。说明测定鸡饲料氨基酸消化率以去盲肠鸡为试验动物较好 相似文献
7.
分别用24只去盲肠和未去盲肠健康公鸡,测定了豆粕、棉仁粕和菜籽粕的氨基酸消化率。试验结果表明:去盲肠鸡内源氨基酸排泄量显著高于未去盲肠鸡(P〈0.05);在大豆粕中,胱氨酸、苏氨酸等5种氨基酸的消化率未去盲肠鸡显著高于去盲肠鸡(P〈0.05);在棉仁粕和菜籽粕中,除个别氨基酸外,大多数氨基酸及氨基酸总和的消化率未去盲肠鸡显著高于去盲肠鸡(P〈0.05),可见,饲料种类、试鸡有无盲肠均影响饲料AAA 相似文献
8.
分别用24只去盲肠和未去盲肠健康公鸡,测定了豆粕、棉仁粕和菜籽粕的氨基酸消化率。试验结果表明:去盲肠鸡内源氨基酸排泄量显著高于未去盲肠鸡(P<0.05);在大豆粕中,胱氨酸、苏氨酸等5种氨基酸的消化率未去盲肠鸡显著高于去盲肠鸡(P<0.05);在棉仁粕和菜籽粕中,除个别氨基酸外,大多数氨基酸及氨基酸总和的消化率未去盲肠鸡显著高于去盲肠鸡(P<0.05),可见,饲料种类、试鸡有无盲肠均影响饲料AAAD和TAAD。盲肠微生物对内源及饲料中未消化蛋白质、多肽及氨基酸具有分解作用,干扰饲料AAAD和TAAD测定。对于不易消化,氨基酸含量相对不平衡的低品质蛋白质饲料干扰尤其严重。因此用去盲肠公鸡测定的饲料AAD值更接近氨基酸在消化道内消化吸收的真实情况。 相似文献
9.
选用健康、体重相近、20周龄泰和公鸡14羽,随机分为2组。测定蛋氨酸表观消化率与真消化率。结果表明:去盲肠泰和公鸡内源氨基酸排泄量高于未去盲肠鸡,但差异不显著(P>0.005)。2组蛋氨酸表观消化率(AA-AD)与真消化率(TA-AD)差异也不显著(P>0.05)。但盲肠微生物对内源氨基酸及饲料中未消化的蛋白质、多肽及氨基酸具有分解作用。 相似文献
10.
饲料氨基酸利用率的测定是进行可利用氨基酸营养研究的一项基础性工作。本研究利用去盲肠公鸡,应用Sibbald“TME”方法,测定了玉米、次粉、高粱、菜籽饼、棉籽饼、棉仁粕、胡麻饼、豆饼、豆粕、鱼粉、豌豆蛋白粉、绿豆蛋白粉、蚕豆蛋白粉的氨基酸表观和真消化率。氨基酸平均真消化率超过90%的依次为豆粕、蚕豆蛋白粉、鱼粉、绿豆蛋白粉、豌豆蛋白粉。消化率低于85%、高于80%的依次为高粱、玉米、次粉,消化率低于80%的依次为棉仁粕、豆饼、菜籽饼、胡麻饼、棉籽饼。所测饲料各氨基酸的平均真消化率大于85%的依次为谷氨酸、异亮氨酸、精氨酸、门冬氨酸、亮氨酸、苯丙氨酸、酪氨酸;消化率在80%~85%之间的依次为丝氨酸、缬氨酸、蛋氨酸、丙氨酸;小于80%的依次为苏氨酸、赖氨酸和胱氨酸。研究结果表明,不同饲料和不同氨基酸之间消化率存在很大的差异。内源氨基酸排泄量对低蛋白饲料氨基酸利用率存在较大的影响。适当的加工处理对于提高饼粕类饲料的氨基酸消化率具有重要意义。 相似文献
11.
采用Sibbald“真代谢能”法测定饲料原料的氨基酸有效利用率。试验鸡分别强饲玉米、大豆粕和鱼粉 ,测定鸡强饲后的氨基酸排出量。结果表明 ,不同种类饲料原料的氨基酸利用率存在差异 ,玉米与大豆粕、鱼粉间差异显著 (P <0 0 5)。不同种类氨基酸之间利用率也有差异。 3种饲料原料的氨基酸真利用率均大于表观利用率 ,其中玉米的差异达到极显著水平 (P <0 0 1 ) ,表明内源性氨基酸对氨基酸利用率有影响 ,且这种影响随饲料原料中粗蛋白质水平的下降而增大。 3种饲料原料的氨基酸利用率在去盲肠鸡与正常鸡之间存在差异。盲肠微生物对饲料原料的氨基酸利用率有影响 ,且对不同种类氨基酸的影响有差异 ,这种影响不能通过内源性氨基酸的校正而消除。另外 ,内源性氨基酸的排泄量在去盲肠鸡大于正常鸡。表明内源性氨基酸也受到盲肠微生物的影响 相似文献
12.
本试验以去盲肠鸡和正常鸡各16只测定了浙江鱼粉和秘鲁鱼粉的氨基酸表观消化率(AAAD)和真消化率(TAAD)。结果表明,以去盲肠鸡测定,浙江鱼粉多数氨基酸的AAAD和TAAD超过秘鲁鱼粉(P<0.05)。以正常鸡测定,两者大多数氨基酸消化率无显著差异(P>0.05)。说明新鲜优质浙江鱼粉的氨基酸可消化性与进口鱼粉相当,甚至更优 相似文献
13.
本文采用去盲肠和有盲肠公鸡的对比试验方法研究了盲肠对饲料磷的消化作用。结果表明:(1)去盲肠鸡内源磷排泄量为49mg/日.只,有盲肠鸡的内源磷排泄量为42mg/日.只,两者差异极显著(P〈0.01),可见,盲肠能够消化吸收内源磷;(2)当公鸡采食含豆粕、棉仁粕、菜籽粕、花生粕或胡麻粕的半纯合日粮时,植酸磷采食量较高,有盲肠鸡磷的排泄量显著低于去盲肠鸡,真消化率显著高于去盲肠鸡(P〈0.05),表明 相似文献
14.
1. The influence of caecectomy and dietary crude protein content (50, 100, 150, 200 and 250 g/kg diet) on the apparent excreta amino acid digestibilities in adult cockerels fed on semi‐purified diets containing soyabean meal (SBM) or cottonseed meal (CSM) as the sole source of protein was investigated. 2. Caecectomy had no influence on the apparent digestibilities of most amino acids in SBM, the exceptions being histidine, arginine and lysine, but lowered the apparent digestibility of amino acids in CSM. 3. The protein content in assay diets has a strong influence on the apparent amino acid digestibility values for poultry. Apparent values are lower when the dietary protein content is low. 4. The use of a single endogenous amino acid output value, generated by regression analysis or protein‐free diets, for true digestibility adjustments across a wide range of protein intakes is questioned. In particular, such an application will penalise estimates of apparent digestibility when the dietary protein content is high. 相似文献
15.
Six ileal-cannulated pigs that averaged 100 kg BW and 16 adult cecectomized cockerels that averaged 2.35 kg BW were used to determine apparent and true digestibilities of amino acids (AA) in a complete crystalline AA mixture and in casein. A protein-free (PF) diet was included as a treatment to estimate endogenous AA losses. Fasted cockerels were compared to cockerels fed PF diets for calculation of true digestibility of AA in cockerels. For the AA diet, true digestibility of indispensable AA in the pig ranged from a low of 97.2% for leucine to a high of 100.5% for arginine (Arg). True digestibility of indispensable AA in casein ranged from a low of 93.5% for isoleucine (Ile) to a high of 99.9% for Arg. Correcting for endogenous losses increased digestibilities of lysine (Lys) and threonine (Thr) in pigs fed the AA diet by 2.4 and 7.1%, respectively, and increased Lys and Thr digestibility in pigs fed the casein diet by 1.8 and 6.1%, respectively. Feeding a PF diet to chickens to correct for endogenous losses resulted in higher true digestibility values for all AA with the exception of tryptophan, methionine, and Arg than those obtained using fasted animals. True digestibilities of Thr were 88.3 and 86.6% for AA and casein diets, respectively, using fasted controls but were 97.5 and 94.5% when the PF control was used. Proline digestibility was increased (P < .05) substantially in both pigs and cockerels when the PF control was used to correct for endogenous AA losses. Regardless of species, Ile in casein had a lower true digestibility value than any other indispensable AA. The results of this study indicated that true digestibilities of AA in a mixture of crystalline AA and in casein are essentially 100% in both pigs and cockerels. 相似文献
16.
Meat-and-bone meal (MBM), which had been heated (150 degrees C) for 0, 1.5, 3 or 5 h, was used along with an indigestible marker in four diets which were fed to young growing chickens and adult cockerels fitted with ileal cannulae. The ileal digesta from each group of birds were sampled and the apparent amino acid digestibilities of the four diets containing MBM were determined. The apparent digestibility values from growing chickens were higher (P less than 0.05) than those from cannulated cockerels. Differences in apparent digestibility of amino acids between diets as a result of heat treatment were consistent for all amino acids when comparing both techniques, with the exception of glutamic acid and arginine. 相似文献
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