共查询到20条相似文献，搜索用时 78 毫秒
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1氨基酸配比与猪日粮营养的关系
动物对饲料中蛋白质的吸收程度取决于饲料中必需氨基酸赖氨酸、蛋氨酸、苏氨酸和色氨酸的配比．因为这些氨基酸在猪体内不能合成。如果动物日粮中缺乏上述任何一种营养，都会影响新陈代谢．并降低动物的生产性能． 相似文献
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苏氨酸的营养生理作用及其在猪低蛋白日粮中的应用 总被引：1，自引：0，他引：1
苏氨酸是猪日粮中的第二或第三限制性氨基酸,自理想蛋白质模型提出后,苏氨酸作为动物必需氨基酸就成了研究的热点。苏氨酸具有突出的生理功效,近年来苏氨酸的免疫学功能更是引起了人们的极大关注。对苏氨酸的营养生理作用及其在猪低蛋白日粮中的应用情况进行简要综述。 相似文献
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随着养殖业的规模化发展，饲料配方设计与营养供给也日益精细化和精准化。适当降低日粮粗蛋白含量且保持日粮氨基酸平衡可提高畜禽饲料蛋白质利用率，降低蛋白质饲料原料使用量，缓解国内大豆种植与进口压力，并且降低生产成本及养殖过程中氮排放对环境造成的污染。近年来，我国相关部门高度重视低蛋白日粮的研发，并出台了一系列标准或技术规范等来推动其在畜禽生产中的应用。然而蛋鸡对日粮中蛋白质含量变化较敏感，目前关于低蛋白日粮在蛋鸡生产中应用的效果并不一致。文章结合国内外研究进展，综述了低蛋白日粮对蛋鸡产蛋前期、产蛋高峰期和产蛋后期生产性能、鸡蛋品质和组成及氮排放的影响，以期为低蛋白日粮在我国蛋鸡生产中的合理应用提供依据。 相似文献
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低蛋白日粮对仔猪生长性能和防治仔猪腹泻的效果试验 总被引：2，自引：0，他引：2
由于受蛋白质资源不足以及环保的影响,畜禽生产上使用低蛋白氨基酸平衡日粮已成为发展趋势。以玉米一豆粕为基础配制日粮满足NRC（1998）猪对营养的需要量,则日粮中各必需氨基酸存在不同程度的过量。因此,通过最佳的搭配平衡以使蛋白质的效率最高,这对减少昂贵的蛋白原料的使用比例非常关键。在日粮中添加合成氨基酸, 相似文献
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小肽在水产养殖中的应用研究 总被引：3，自引：0，他引：3
充分合理地利用饲料中的蛋白质,是动物营养学科研究多年来一直关注的热点问题。传统的蛋白质理论认为,蛋白质必需水解为游离氨基酸后才能吸收利用,即蛋白质营养就是氨基酸营养。根据这一理论,只要给动物提供充足的必需氨基酸,就能获得最佳生产性能。但近年来研究发现,给动物饲喂按理想蛋白质模式配制的氨基酸纯合日粮或低蛋白氨基酸平衡日粮,动物并不 相似文献
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我国蛋白质类饲料资源紧缺,畜牧业发展迅速,畜禽存栏量不断增加,畜禽饲料利用率低,养殖业产生的排放物造成愈加严重的环境污染等,这些都制约着我国饲料业和畜牧业的发展。而采用氨基酸平衡低蛋白日粮技术可缓解以上问题,且不会降低畜禽的生产性能。目前,此技术在单胃动物上研究较多并取得预期的效果。而反刍动物因有独特的瘤胃,更适于降低日粮蛋白质水平补充非蛋白氮和氨基酸以达到节能减排的目的。文章以氨基酸平衡低蛋白日粮在猪、鸡的应用为基础,就反刍动物生理消化特点,探讨低蛋白日粮在其的适用性,并展望低蛋白日粮补充氨基酸和非蛋白氮物质在反刍动物上的应用前景,这对建立反刍动物最佳营养策略具有重要意义。 相似文献
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低蛋白日粮在养猪生产中的应用 总被引：1，自引：0，他引：1
随着养殖业的快速发展,排泄物对环境的污染问题越来越突出,猪排泄物中含有大量的氮和磷,这些氮和磷流人环境后将会给环境造成巨大的污染。通过合理地处理和利用猪排泄物,可以部分解决环境污染问题。只有从源头上控制氮的采食量和提高氮磷在猪体内的吸收和利用率,才能从根本上降低猪排泄物中氮磷对环境的污染程度。减少养猪生产中氮磷排出量的方法包括利用可消化氨基酸配合日粮、使用合成氨基酸及“理想蛋白”模式的应用等。低蛋白日粮配制技术就是按照“理想蛋白”和可消化氨基酸配合日粮技术发展而来的。 相似文献
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Beran GW 《Preventive veterinary medicine》2008,86(3-4):198-207
When early people made their appearance, zoonotic infectious diseases were already waiting, but epidemic diseases did not appear in human history until people began to live in large numbers under conditions of close contact, mainly during the last 10,000 years. Disease has decimated urban populations, conquered armies, and disrupted society. The focus here is on (1) the plague of Athens and the Black Death; (2) smallpox, influenza, and rabies; (3) avian influenza prion diseases, and foot & mouth disease; and (4) emerging and re-emerging diseases. All have veterinary public health associations. In Athens, Greece, in 430 BC, when the Spartans ravaged the countryside, hordes crowded into Athens so that orderly movements, space in which to live, and adequate supplies of food became impossible. Crowding of any population fosters disease transmission; chaos and disorder enhance it all the more. Out of northern Egypt came a terrible plague from across the Mediterranean Sea. The identity of the plague of Athens remains unsure, but the well-considered conclusion is Rift Valley Fever, a mosquito borne, viral zoonosis. The Black Death, also called the Plague, raged in Asia for centuries. In 1347, the Black Death was brought by a ship out of Asia to Sicily. The scenes of devastation were repeated throughout Europe, with 90% or more of the people dying in city after city. Influenza, too, has been a cause of periodic human epidemics, but the great pandemic of influenza occurred in the last months of World War I. In the years of highest occurrence, more than half the world's population became clinically infected. If veterinary public health had been born earlier, it could have led to elucidating the epidemiology of influenza and the plagues of Athens, Europe, and Asia. In turn, smallpox had also caused continual tragedy. In 1796, Edward Jenner began to harvest pustules of cowpox from children or infected cows and inject them into susceptible children. In 1980, the World Health Organization declared that smallpox had been eliminated from the world. Rabies, though, still strikes terror. A number of animal diseases, broadly termed emerging and re-emerging diseases, need surveillance because they have the potential to impact human health. From late in 2003 to 2007, the highly pathogenic H5N1 influenza virus in poultry infected at least 121 people and caused 62 deaths in four countries. The prion diseases, too, all have very high numbers in concentrated contacts. To control these diseases, veterinary public health is essential, with diagnosis, epidemiological surveillance, clinical manifestations, and prevention as primary measures. 相似文献
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Dekker A Dercksen D Snoep J van Wuyjckhuise L 《Tijdschrift voor diergeneeskunde》2007,132(18):695-701
On 26th of july 2007 a new case of bluetongue was notified in the Netherlands and on 2nd of august 2007 foot-and-mouth disease was diagnosed in Surrey, England, which raised the threat of having both infections simultaniously in one area. Bluetongue and foot-and-mouth disease have a different pathogenesis, but symptoms may resemble each other at a later stage of infection. The pathogenesis and possible clinical symptoms of both infections are discussed and illustrated with pictures. 相似文献
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在动物的异常行为中以刻板行为最为常见,而咽气癖又是马最常见的口部刻板行为之一。作者就咽气癖在生理方面和心智方面对马体产生的影响、行为基础、诱因的研究进展及常见的防治措施进行综述。 相似文献
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