饲料加工工艺对营养物质利用率及畜禽生产性能的影响

高品质的饲料产品不仅取决于配方好坏、原材料的优劣,同时加工工艺也起着重要的作用。饲料在加工过程中会发生一系列物理、化学变化,从而影响饲料中各种营养成分的利用率,以及动物的生产性能。文中从饲料粉碎粒度、混合均匀度、膨化与否、制粒效果方面对营养物质利用率和畜禽生产性能的影响作一综述。     

饲料加工工对营养物质利用率及畜禽生产性能的影响

高品质的饲料产品不仅取决于配方好坏、原材料的优劣,同时加工工艺也起着重要的作用.饲料在加工过程中会发生一系列物理、化学变化,从而影响饲料中各种营养成分的利用率,以及动物的生产性能.文中从饲料粉碎粒度、混合均匀度、膨化与否、制粒效果方面对营养物质利用率和畜禽生产性能的影响作一综述.     

饲料加工工艺对营养价值的影响

饲料加工工艺对营养价值有着重要影响,采取不同的加工工艺会得到不同性质的饲料,选择合理的饲料加工工艺有利于制作合适的动物饲料,提高动物对饲料的利用率和动物的生产性能。文章综合探讨了热处理、粉碎、制粒、碱处理、膨化等常用加工工艺对饲料营养成分蛋白质、脂肪、淀粉、维生素的影响,为合理选择饲料加工工艺提供参考。     

饲料加工工艺对营养物质利用率及畜禽生产性能的影响

高品质的饲料产品不仅取决于配方好坏、原材料的优劣，同时加工工艺也起着重要的作用。饲料在加工过程中会发生一系列物理、化学变化，从而影响饲料中各种营养成分的利用率，以及动物的生产性能。本文从饲料粉碎粒度、混合均匀度、膨化与否、制粒效果方面对营养物质利用率、畜禽的生产性能都有不同程度的影响作一综述。     

饲料加工工艺对饲料营养成分及动物生产性能的影响

综述饲料加工过程中粉碎、混合、制粒和膨化4种主要的加工工艺对饲料营养成分和动物生产性能的影响,为合理选择饲料加工工艺提供理论依据。     

浅议基于动物营养学基础的饲料加工技术研究与展望

正现代的饲料加工技术除传统的粉碎、调质、制粒外,还包括微生物发酵、挤压膨化、化学处理等技术。饲料加工技术研究成果为饲料工业的发展及动物营养学研究做出了巨大贡献,但与动物营养学的发展需求相比仍有较大差距,这种状况也阻碍了动物营养科学最新成果的应用。饲养标准和营养需要量是动物营养的两大重要基础,而饲料加工技术及生产工艺都会影响这两大基础,因此与动物营养相关的饲料工艺技术研究一直受到学者     

制粒和膨化对饲料营养成分的影响

制粒和膨化由于其特有的热加工工艺条件,能够使淀粉糊化,蛋白质变性,改善饲料适口性及提高饲料消化率;但同时也破坏了饲料中的维生素、酶等热敏成分。本文主要综述制粒和膨化工艺对饲料中主要营养成分的影响。     

加工工艺对饲料营养价值和动物生产性能的影响

优质的饲料产品不仅取决于配方好坏、原材料的优劣,同时加工工艺也起着重要的作用。饲料粉碎粒度、混合均匀度、膨化与否、制粒效果、调质时间不仅影响营养物质本身有效含量,同时对营养物质利用率、畜禽的生产性能都有不同程度的影响,本文就有关问题作一综述。     

加工工艺对饲料营养价值及动物生产性能的影响

饲料是畜禽生产上开支最大的一项，在我国饲料支出约占总成本的６５％～７０％，通过恰当的加工方法可以获得较好的经济效益。饲料加工的目的正是为了充分发挥饲料营养价值的潜力，提高产品质量和饲养效果。饲料加工对动物营养的影响一直是饲料加工工艺学家和动物营养学家关心的问题，将加工工艺学和动物营养学有机结合起来能够更大提高动物生产性能。１粉碎粉碎的主要目的是增加饲料接触消化酶的表面积，以使之更易于消化，这也是饲料搅拌、制粒和接受其它处理所必需的。目前许多研究结果表明：粉碎对饲料营养价值和畜禽的生产性能有明显的…     

饲料加工工艺对禽生产性能的影响

饲料是畜禽生产上开支最大的一项，在我国饲料支出约占总成本的６５％７０％，通过恰当的加工方法可以获得较好的经济效益。饲料加工的目的正是为了充分发挥饲料营养价值的潜力，提高产品质量和饲养效果。饲料加工对动物营养的影响一直是饲料加工工艺学家和动物营养学家关心的问题，将加工工艺学和动物营养学有机结合起来能够更大提高禽生产性能。１粉碎粉碎，是饲料加工中的标准，粉碎的主要目的是增加饲料接触消化酶的表面积，以使之更易于消化，这也是饲料搅拌、制粒和接受其它处理所必需的。目前许多研究结果表明：粉碎对禽生产性能有明…     

Disease and destiny-mystery and mastery

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.     

Foot and mouth disease and bluetongue: differences and similarities

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.     

德国荷兰畜禽产品质量安全交流与启示

2018年岁末,笔者有幸赴德国和荷兰,就畜产品质量安全控制及检测技术等进行了短期交流,收获颇丰,现具体介绍如下。一、交流情况德国面积35.73万平方千米,人口约8175.2万,是欧盟人口最多的国家,农业发达,机械化程度很高。德国的畜牧业以猪、牛、羊和禽类为主,畜牧业产值占农业生产总值的61%。德国虽然农业比重很小,但却是有机农业运动最早的发起国,也是目前世界上有机农产品生产与消费大国。     

奶牛肢蹄病及其防治

简介常见奶牛肢蹄病种类及其症状,从日粮营养、运动场地面结构、环境卫生、饲养管理、遗传育种、疾病管理等方面简析奶牛肢蹄病的病因,并提出相应的预防措施。     

畜禽物种多样性及其保护和利用

文章就我国畜禽物种多样性资源的现状、保护和利用等方面进行阐述,为生态脆弱的喀斯特地区畜牧业可持续发展提供参考。     

马的咽气癖及其防制措施研究进展

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。     

国内外蛋氨酸与赖氨酸市场分析与展望

近几年,世界饲用添加剂市场增长较快,预计今后将进一步增长,据世界粮农组织(FAO)首领会议的倡议,到2015年,将使世界营养不良的人口削减一半,其间,肉制品将会以每年2％的速度增长,特别是加快猪肉和禽肉增长。这将促进世界添加剂,尤其是蛋氨酸和赖氨酸需求量的增加。     

牛羊焦虫病诊断与防治技术

近几年来,辽宁省牛羊饲养业迅速发展,焦虫病的危害越来越明显,已成为危害牛羊的主要疾病之一。为了提高牛羊焦虫病的防治水平,保证我省牛羊饲养业的健康发展,笔者在参阅文献和同行们诊疗经验的基础上,结合自己的治疗实践,详细阐述了我省牛羊焦虫病近几年的流行特点和诊断防治方法。