共查询到19条相似文献，搜索用时 140 毫秒
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多不饱和脂肪酸（PUFA）是一种具有独特生物功能的物质，在机体免疫、脂质代谢、基因表达、细胞膜功能等方面有着重要的作用，对人和畜禽的健康有着重要的影响。本文综述了多不饱和脂肪酸主要的生物学功能，在养猪生产上的应用以及富含多不饱和脂肪酸猪肉产品的研究进展。 相似文献
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苏氨酸在禽类生产中的应用研究 总被引：1，自引：0，他引：1
苏氨酸通常是禽类的第三限制性氨基酸。禽类日粮中添加适量苏氨酸，可提高其生产性能，增强免疫机能，改善胴体品质。本文论述了苏氨酸的理化性质、生物学功能，并介绍了苏氨酸在禽类生产中的应用和禽类对其需要量及其影响因素。 相似文献
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多不饱和脂肪酸的营养功能及其在家禽生产中的应用 总被引：10，自引：0，他引：10
多不饱和脂肪酸是一类具有重要生物学功能的物质，主要包括n-3和n-6系列多不饱和脂肪酸，它们对脂类的代谢，机体的免疫，血液生化特性的影响，机体的生长发育及细胞膜功能的发挥和基因表达调控等许多方面起着重要的作用，本文主要介绍了多不饱和脂肪酸的营养功能及其作用的机理，并就其在家禽生产中的应用作一综述。 相似文献
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随着人民生活水平的提高，人们对安全、绿色食品的需求量越来越多。而磺胺类和抗生素类药物在动物生产中的应用非常广泛，随之带来的就是因药物残留引起一系列的食品安全问题。在日粮中添加多不饱和脂肪酸（PUFA）可以提高动物的免疫功能，从而减少动物患病的可能及动物生产过程中用药的机会。因此，多不饱和脂肪酸的应用可以为安全食品的提供做出贡献。本文对PuFA对动物免疫功能的影响作一综述。 相似文献
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本文总结了ω-3多不饱和脂肪酸调控机体免疫功能及其对信号通路的影响，揭示其作用机理，同时对其在饲料中的应用进行了总结和展望。 相似文献
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ω-3多不饱和脂肪酸具有重要的生物学功能。本文从脂类代谢、细胞膜功能、免疫机能、基因表达以及抑制肿瘤等方面对ω-3多不饱和脂肪酸的生物学功能进行论述,同时简要阐述了ω-3多不饱和脂肪酸应用的研究现状。 相似文献
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苏氨酸通常是禽类的第三限制性氨基酸。禽类日粮中添加适量苏氨酸,可提高其生产性能,增强免疫机能,改善胴体品质。本文综和论述了苏氨酸的理化性质、生物学功能,并介绍了苏氨酸在禽类生产中的应用和禽类对其需要量及其影响因素。 相似文献
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The objectives of this research were to examine the palatability of stabilized rice bran (SRB) when included in a dry canine diet, and to determine the effects of SRB on food intake, digestion, fecal characteristics, blood lipid characteristics, and selected immune mediators. Experiment 1 tested the palatability of SRB. Diets contained poultry fat in Test 1 and soybean oil in Test 2, in conjunction with either 12% SRB or 12% defatted rice bran (DRB, as-fed basis), and were fed to 20 dogs. Diets contained approximately 32% protein and 22% fat (DM basis). Food intake data were collected and intake ratios calculated (grams of SRB diet consumed divided by total consumed of both diets). Intake ratios were 0.73 for Test 1 (P < 0.01) and 0.61 for Test 2 (P < 0.14) for SRB diets. Diets in Exp. 2 contained 12% SRB or DRB (as-fed basis), and poultry fat, beef tallow, or poultry fat:soybean oil (50:50) as the main fat sources, and were fed to 36 beagles. Diets contained approximately 32% protein and 22% fat (DM basis). The effects of SRB and DRB were determined on food intake, digestibility, fecal characteristics, and blood fatty acid, phospholipid, and eicosanoid concentrations. No differences were noted in food intake, digestibility, or fecal characteristics. Fat sources contributed much more to dietary fat than rice bran source; therefore, fat source profiles overwhelmed the rice bran source contribution. Dogs consuming a DRB diet had lower (P < 0.050) plasma phospholipid total monounsaturated fatty acids compared with those consuming a SRB diet (-1.17 vs. 0.95%, respectively), whereas plasma fatty acid concentrations tended (P < 0.119) to decrease more than with SRB diets. Total concentrations of red blood cell phospholipid SFA tended (P < 0.15) to be greater in dogs consuming a beef tallow-containing diet compared with those consuming a poultry fat or poultry fat:soybean oil diet. Total concentrations of red blood cell phospholipid PUFA and n-6 PUFA tended to be greater (P < 0.097 and P < 0.083, respectively) in dogs consuming a poultry fat-containing diet than in those consuming a beef tallow-containing diet. Statistical differences and tendencies were detected in individual plasma fatty acids and plasma and red blood cell phospholipids due to rice bran source, fat source, and their interaction. Eicosanoid concentrations did not change due to treatment. Stabilized rice bran is a highly palatable ingredient when included in a dry dog diet, and did not elicit an effect on inflammatory immune mediators in healthy dogs. 相似文献
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过去几十年来,由于饲用抗生素在畜牧养殖业中的滥用,导致畜禽正常的肠道菌群被破坏并引起肠道细菌耐药性和环境污染等一系列问题,严重损害了畜禽的肠道健康。同时,近年来集约化养殖已经成为畜牧业的发展方向,养殖规模越来越大,如何有效地提高畜禽免疫力已然成为重点的研究方向。健康的肠道是保障畜禽健康生长的基础,保持健康的肠道菌群,能有效提高动物机体的免疫力和抗病能力。甘露寡糖是一种绿色新型饲料添加剂,作为一类功能性寡糖,具有改善畜禽肠道健康和提高免疫应答等作用。在猪生产中,添加甘露寡糖能够提高断奶仔猪的生长性能和免疫力。在家禽生产中,添加甘露寡糖能够改善家禽肠道菌群并提高生产性能和肉品质。作者主要介绍了甘露寡糖的结构及理化性质、改善肠道健康和免疫调控机制及其在断奶仔猪、育肥猪、蛋鸡和肉鸡生产中的应用效果。重点总结了甘露寡糖对畜禽肠道健康和免疫的调控机制及免疫途径,旨在为甘露寡糖在肠道健康和免疫调控方面的深入研究及其在畜禽养殖中的应用提供理论依据。 相似文献
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Sijben JW Schrama JW Nieuwland MG Hovenier R Beynen AC Verstegen MW Parmentier HK 《British poultry science》2002,43(2):297-305
1. Effects of dietary polyunsaturated fatty acids (PUFA) and vitamin E (VE) on an immune response may interact because VE may protect PUFA from in vivo oxidation. The present study was designed to study the presence of such an interaction in growing layer chickens. 2. Three dietary concentration of linoleic acid (LA, 3.3, 6.6 and 10%), in combination with 4 concentration of dietary VE (5, 20, 40 and 80 mg/kg) were used. Effects of LA and VE on circulating VE concentration, fatty acid composition of bursal and adipose fat, and antibody kinetics against keyhole limpet hemocyanin and Mycobacterim butyricum were established. 3. At high dietary LA concentration, bursal and adipose LA were higher but bursal arachidonic acid and long chain n-3 PUFA decreased. The dietary VE level did not consistently affect the deposition of PUFA in tissue. Plasma VE concentrations were affected by the dietary VE and LA content, but not by their interaction. Antibody responses before and 7 d after immunisation were affected by the dietary treatments. Antibody concentration were not affected by tissue fatty acid content. 4. In conclusion, the interaction effects of dietary PUFA and VE on fat deposition and immune responses are of minor importance compared to separate PUFA and VE effects. This implies that, within the studied range, adding extra VE to preserve or affect the effects of dietary PUFA on antibody responsiveness is unnecessary. 相似文献
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大豆异黄酮对畜禽生理机能的调控 总被引：2，自引：0，他引：2
大豆异黄酮作为一类植物雌激素,对动物机体作用非常广泛.近年来研究发现大豆异黄酮对畜禽生理机能有一定的调控作用,本文综述了大豆异黄酮对畜禽生产性能、免疫功能和抗氧化功能等方面的调控作用. 相似文献
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Villaverde C Cortinas L Barroeta AC Martín-Orúe SM Baucells MD 《Journal of animal physiology and animal nutrition》2004,88(3-4):143-149
Vitamin E requirements are linked to dietary polyunsaturated fatty acids (PUFA) content as a result of the protective effect of vitamin E from lipid peroxidation. On the other hand, it has been suggested that dietary PUFA interfere with vitamin E absorption. A 4 x 4 factorial study was planned to assess the effect of dietary vitamin E inclusion level (0, 100, 200 and 400 mg/kg) and degree of unsaturation (15, 34, 45 and 61 g PUFA/kg) on vitamin E apparent absorption and tissue deposition in poultry. A total of 192 female broiler chickens were used. A digestibility balance was carried out between 19 and 23 days of age to calculate apparent absorption of fat and vitamin E. The livers of 96 animals were obtained at 44 days of age for vitamin E determination. Increasing dietary levels of vitamin E reduced its apparent absorption. The more saturated diet reduced fat and vitamin E apparent absorption while PUFA levels from 34 to 61 g/kg did not modify this parameter but reduced the hepatic vitamin E concentration, suggesting a greater systemic use of this vitamin. These results suggest that PUFA do not limit vitamin E absorption, although they may increase its degradation in the gastrointestinal tract. 相似文献
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植物化学物质存在于各种植物和真菌中,是一种非营养性化合物,对动物具有多种有益的生物活性。近年来,随着抗生素的限制,植物化学物质已被认为是家禽生产过程中应对挑战的首选。快速生长型肉用鸡品种在生长环境中受到应激时表现出较强的脆弱性,降低家禽生产性能的氧化还原平衡可能与免疫系统有关,因为氧化应激和炎症损伤是一个多阶段过程。本文首先讨论了氧化应激和炎症对家禽业的影响,其次综述了近年来植物化合物的抗氧化和免疫调节作用的研究进展。 相似文献