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近几年来,肉鸡鸡群发病率呈上升趋势,且不易防治,使饲养成本提高,效益下降.如何养好肉鸡、降低肉鸡的发病率,提高肉鸡饲养的经济效益,成为广大肉鸡饲养户普遍关心的问题.现综合各地肉鸡的饲养经验总结如下,供肉鸡养殖户参考. 相似文献
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冬季大棚饲养肉鸡密度较大,对生长环境的要求较严,如果饲养管理水平较低,鸡群极易发生传染病,如球虫病、鸡白痢、大肠杆菌病、慢性呼吸道病等.这就要求在饲养肉鸡时,应加强饲养管理,努力为肉鸡提供一个良好的生长环境,提高肉鸡出栏体重和成活率,从而获得较高的经济效益. 相似文献
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冬季大棚饲养肉鸡密度较大,对生长环境的要求较严,如果饲养管理水平较低,鸡群极易发生传染病,如球虫病、鸡白痢、大肠杆菌病、慢性呼吸道病等.这就要求在饲养肉鸡时,应加强饲养管理,努力为肉鸡提供一个良好的生长环境,提高肉鸡出栏体重和成活率,从而获得较高的经济效益. 相似文献
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肉鸡饲养效益主要取决于肉鸡的饲养管理以及肉鸡的遗传因素。肉鸡的遗传因素与生俱来,后天不能将其改变,但是肉鸡的饲养技术可以进行人为调控,能够满足肉鸡的生长发育需求。肉鸡的饲养管理必须从药物预防、光照控制、通风状况、密度、湿度以及舍内温度等方面入手,为鸡群提供一个适合生长的环境,进而将养殖的经济效益提升。 相似文献
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肉鸡败血型支原体病也叫做肉鸡霉形体病,是一种典型的慢性呼吸道疾病,也是一种接触性传染性疾病.4～8周龄鸡的易感性最高,病鸡主要临床症状是鼻炎、咳嗽增多、打喷嚏、呼吸加速.随着肉鸡养殖产业逐渐发展,鸡群饲养密度持续增大,该病的发生呈升高趋势.鸡群发病后若未及时采取有效的治疗措施,会严重损害养鸡业的经济效益.现对肉鸡败血性... 相似文献
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饲养肉鸡要效益关键是确保鸡群健康无病。只有鸡群健康才能成活率高,长势快,料肉比低。于是才能实现养鸡收人多,成本支出低,经济效益好。 据当前饲养肉鸡情况看,对养鸡威胁最大的仍然是鸡病危害鸡群健康。鸡的主要疾病仍然是新城疫、传染性支气管炎、呼吸道霉形体病以及大肠杆菌病等。这些鸡病如得不到很好控制,鸡群就 相似文献
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目前农户饲养肉鸡多采用24 h光照、半开放式平养方法,饲养规模一般在几千到几万只不等.由于采用24h光照的方法饲养肉鸡,若突然停电容易造成鸡群应激,出现鸡群打堆死亡现象. 相似文献
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肉鸡在饲养过程中发生死亡的现象多集中于雏鸡饲养期．而且多在出壳第1周。如果此期肉鸡雏死亡率过高，不但经济效益直接受影响．还可造成鸡群的品质下降．影响整体经济效益。笔者结合多年饲养肉鸡实践．认为雏鸡死亡的原因与孵化和育雏期饲养管理中的某些问题有关。具体可以从以下几方面考虑并加以解决。1．种蛋品质：孵化同一批鸡群所产出的种蛋．鸡龄是否适合．生理状况、遗传性能是否优良.鸡群的性比例是否合理．入孵前集蛋、筛选、运输、保存是否操作合理、方法正确．都会使种蛋的品质出现差异．如果哪项不合格．就会使种蛋品质变差．… 相似文献
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在肉鸡的饲养过程中,由于饲养周期短,养殖户往往会掉以轻心,由于这样那样的原因而造成鸡群发生疾病,从而会造成鸡群大量伤亡,严重威胁养鸡业的发展,因此加强饲养管理,科学喂养,做好控制肉鸡的疾病是十分必要的,主要抓以下几个方面. 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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