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我国的白羽肉鸡业已发展20多年,此间,通过引进、消化、吸收国外先进的技术,该产业取得了巨大成绩。据统计,2006年我国禽肉产量中,白羽肉鸡的贡献率已超过40%。目前,就白羽肉鸡种鸡而言,无论是硬件条件,还是饲养技术,我国都已能达到世界先进水平,并且在种鸡笼养方面还有技术上的优势。 相似文献
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本试验旨在研究基因重组传染性囊病疫苗对白羽肉鸡腔上囊发育、免疫功能及生产成绩的影响。以白羽肉鸡为研究对象,试验选择1日龄白羽肉鸡,随机分为2组,对照组白羽肉鸡14日龄饮水免疫IBD活疫苗,基因重组传染性囊病疫苗组(试验组)白羽肉鸡于1日龄颈部皮下注射基因重组传染性囊病疫苗,测定其腔上囊发育、生产成绩及鸡群IBD VP2抗体水平。结果表明,28日龄、35日龄试验组的腔上囊明显大于对照组;试验组生产成绩明显高于对照组,试验组产生抗体较早,鸡群没有免疫空白期,能有效的抵抗IBD病毒的早期感染。可见,基因重组传染性囊病疫苗可提高鸡群免疫性能,从而提高生产成绩,避免IBD病毒的早期感染。 相似文献
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我们无法穷尽1984年国家恢复肉鸡生产统计以来中国肉鸡业的发展细节,也无法统计中国白羽肉鸡二十年来的生产细节;我们所能做的,就是从这些同白羽肉鸡生产紧密联系了二十年的人们身上,看到中国白羽肉鸡业发展的侧影。 相似文献
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白羽肉鸡笼养研究现状与发展趋势 总被引:4,自引:0,他引:4
《中国家禽》2016,(18)
本文所述笼养特指白羽肉鸡笼养,是近年来在中国逐步发展起来的一种白羽肉鸡特殊养殖模式。与国内外传统的白羽肉鸡平养模式相比,笼养能够提高单位空间的养殖出栏数量,节约土地资源,改善养殖环境条件,提高生产效率。但肉鸡笼养一次性投入高,对技术及管理水平要求高,某些方面不符合欧美国家的动物福利要求,也限制了笼养模式的推广。文章就肉鸡笼养类型、设备工艺、养殖效果以及存在的问题和解决方法进行介绍,为肉鸡健养殖模式的选择提供参考。 相似文献
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一 祖代种鸡生产情况
1 主要品种及产区
目前国内饲养的白羽肉鸡品种主要为:AA+、罗斯308、科宝艾维茵。
白羽肉鸡的饲养主要集中在长江以北,以山东省、辽宁省、河南省、河北省、江苏省为主。 相似文献
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国内白羽肉鸡企业饲养的主要品种为:AA、AVIAN、ROSS、HUBBARD及COBB等,年饲养的规模从几百万到几千万羽。饲养的周期从40天左右到50多天,上市每羽重从2.0至3.0千克左右,饲养的最主要成本为饲料(约占总成本的百分之七十)。但影响肉鸡生产成绩另一最主要因素是疫病的发生。特别是在冬春低温疫病多发季节(长江以南地区从11月中旬至次年3月中旬。长江以北地区从10月底至次年4月中旬)。 相似文献
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现代白羽肉鸡的主要特点是生长速度快,饲料消耗少,只有满足了肉仔鸡生长发育的各种需要,肉鸡遗传潜力才能得到充分发挥,并获得最佳的生产性能,本文剖析了影响肉仔鸡生产性能的一些主要因素。 相似文献
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统计并分析了广东某集团BT服务部、SHT服务部、GM服务部、TP服务部2010年3月不同品种上市肉鸡生产成绩与不同品种饲料用料比例,忽略各服务部在管理水平等方面的差异,将用料比例上的差异视为各服务部生产成绩差异的惟一因素,并通过不同服务部间相同品种生产成绩对比,筛选出该品种最佳生产成绩所对应的用料比例,即可视为最理想的用料比例.分析结果表明,各品种肉鸡不能过多使用大鸡料,各品种肉鸡大鸡料用量比例(上限)为黄5(45%)、矮B(52%)、土1(19%)、麻5(50%)、竹3(37%).但各品种肉鸡大鸡用料量比例下限以多少为宜,还有待于进一步的调查研究. 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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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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