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《中国畜牧兽医文摘》2016,(6)
规模化奶牛场提高原料奶的质量,必须从营养调节、饲养管理、规范化挤奶、原料奶的贮存运输等几个关键环节进行规范化、标准化的管理控制,对原料奶的生产过程实行标准化管理,使奶牛能够健康的生产优质牛奶,尽可能地减少和降低生产过程对原料奶的污染,同时对各环节影响原料奶质量的因素加以预防和控制,只有这样才能确保生产质优量多的原料奶,实现牛场效益的最大化。 相似文献
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通过开展奶牛生产性能测定(DHI)技术,提高了牛奶的质量和产量,降低了饲养成本,使奶牛场牛群由以往偏重整群管理水平向注重个体精细化管理水平转变,牛场也由以往的偏重提高奶产量向提高牛奶质量转变,因此运用奶牛生产性能测定(DHI)技术,对有针对性的在短期内提高该区奶牛规模养殖水平和提高全区奶产量具有重要的指导意义。 相似文献
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采用C#编程语言和SQLServer2005数据库建立的现代奶牛场标准化数字管理系统,并将GAP（良好农业规范）标准通过C#编程语言写入奶牛场饲养管理数据库当中,进一步为传统奶牛场提供技术支持,使现代化奶牛场实现数字化养殖管理和程序化监控,从而提高奶牛场生产者的饲养管理技术水平,以及奶牛产量和原料奶的质量,增加奶牛场的经济效益。 相似文献
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现阶段国内大部分资料报道只是关于奶产量、乳成分、体细胞数等部分指标之间的关系,而且样本量不大。本研究以宁夏地区5个规模奶牛场为研究对象,收集整理了22 360头次奶牛的DHI测定数据,利用EXCEL软件和SPSS软件进行数据处理,比较了奶产量与产犊间隔、体细胞数及乳成分之间的关系。结果表明:随着奶产量的增加,产犊间隔没有显著变化(P0.05);体细胞数逐渐增加;乳脂率、乳糖率逐渐下降;乳蛋白率没有明显变化趋势且各组之间差异不显著(P0.05)。通过研究结果,使奶牛场从业人员更为准确地了解影响奶牛生产性能的因素,为奶牛场的生产及管理提供科学的依据,对规模奶牛场实施"测奶养牛",精准化饲养管理,提高奶牛群体生产性能、生鲜乳品质具有较好地指导意义。 相似文献
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改变饲喂方式对奶牛乳脂率含量的影响 总被引：1，自引：0，他引：1
近年来，尽管奶牛的个体产奶量有所提高，但伴随着一个普遍性的问题是乳脂率很难提高，而且有下降的趋势。影响乳脂率高低的因素除遗传 (品种、个体 )外，还与外界因素 (饲料、饲养管理、生理阶段、气候等 )有关。由于奶业发展过程中尚未形成统一的“按质论价”的收购标准，故在一些奶牛场 (家 )只注重产奶量的提高而忽视了奶质量。由于奶质量达不到购方的要求而给生产单位造成经济损失 (如灵武奶牛场在 1999年 8月份因鲜奶乳脂率达不到夏进乳品公司的收购标准而损失 7万多元 )。同时，从营养角度出发，奶牛日粮中干物质采食量不足，尤其是… 相似文献
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牛奶中的尿素氮含量测定是奶牛生产性能测定（DHI）的一项重要分析指标。牛奶尿素氮是乳蛋白的一部分,对评价奶牛日粮中蛋白质需要量和利用量方面有着非常重要的作用。试验测定了不同品种泌乳牛饲喂相同日粮混养后,其奶样中尿素氮水平的变化,并分析其对奶牛生产的影响因素,为合理配制奶牛日粮和科学饲养管理提供技术依据。 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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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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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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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。 相似文献
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