牛品种改良人工授精技术

牛养殖产业化不断发展,品种改良工程已成为推动畜牧养殖产业现代化发展,实现优良品种快速覆盖的重要举措。品种改良需依托人工授精技术,而人工授精技术的好坏对品种改良进程产生最直接的影响。河南驻马店市泌阳县不断加强牛品种改良进程,依托人工授精技术,实现本地牛的快速更新复壮,切实提高后代生产能力,为牛养殖产业的健康发展奠定坚实基础。该文在探讨河南驻马店泌阳县牛品种改良现状基础上,分析提高牛品种改良的人工授精技术要点,论述牛品种改良过程中需注意的问题,以期为更好地提高牛品种改良质量、改良效率提供帮助。     

提高母牛人工授精受胎率的几点经验

母牛人工授精受胎率不高一直是牛品种改良工作中的一个大难题，特别是在广大农村，牛的放养较粗放、散乱，公母牛随意混合放牧，这种情况给在广大农村开展牛的品种改良工作带来了较大的困难。笔者从事母牛人工授精工作是从2000年开始的，这几年来，一直在摸索提高母牛人工授精受胎率的方法，总结了几点经验体会，与大家共同交流探讨。要搞好牛的人工授精，     

提高牛品种改良和人工授精技术的措施

牛品种改良在我国畜牧业发展中发挥了重要作用。在牛品种改良工作中,人们对人工授精技术要求也变得越来越高。为了有效提升牛品种改良工作的效率,本文详细分析牛品种改良优势及人工授精技术各项要点,以提高牛品种改良的质量,推动养殖效益的提升。     

规范人工授精，促进品种改良

人工授精技术在牛品种改良工作中占据了十分重要的地位,而牛人工授精中应用最广泛、效果较好的是牛冷冻精液配种技术.牛冷冻精液配种技术在我国用于牛的繁殖已有50多年的历史,为我国改良本地牛取得了显著成绩.但是,人工授精后母牛的受胎率高低不一,某些地区不到50%,其主要原因是操作不规范,对品种改良的推广和畜牧业的发展形成很大阻力.因此,规范人工授精技术,有可能提高母牛的受胎率,促进牛品种改良.     

浅谈牛人工授精中应注意的问题及解决方法

人工授精作为一项实用繁殖技术已在各养殖场得到广泛应用。早在上世纪50年代初，广西区就积极开展了黄牛的人工授精试点工作。当前广西区正大力进行牛的品种改良工作，而人工授精则是最主要的技术手段。本文就牛人工授精中常见的一些问题，结合笔者的生产实践经验，简略地进行总结并提出解决方法。     

牛的冻精人工授精技术实践解析

目前，我国牛的冻精人工授精技术应用广泛，使优良的品种产能得到充分的挥发，促进了品种改良，对牛产业的发展起到极大的推动作用。本文通过查找文献、结合工作实践解析牛的冻精人工授精技术，以期为牛人工授精技术的应用提供参考，对广大配种员有所帮助。     

基层牛人工授精员培训的经验体会

牛品种改良成功的关键在于牛品改员对人工授精技术掌握的熟练程度,要大规模推广牛人工授精,就必须要有大量的熟练掌握牛人工授精技术的基层技术员,因此培训好基层牛人工授精员是做好牛品改的基础和重要保证。笔者近几年来一直在     

提高水牛人工授精受胎率的技术措施

水牛人工授精受胎率一直不高是牛品种改良工作中的一个难题。在农村,牛的饲养管理粗放,散乱,这给畜牧工作者在农村开展牛品种改良带来一定的困难。笔者从2003年开始从事水牛人工授精工作,现将如何提高水牛人工授精受胎率的技术措施简述如下：     

牛品种改良与人工授精技术

笔者介绍了牛品种改良的优势,分析了其中存在的问题。从重视母牛发情鉴定、充分做好授精准备、严格遵守输精操作规范3个方面,提出了提高牛人工授精受胎率的建议,希望对促进博白县牛品种改良与人工授精技术的发展有所裨益。     

牛品种改良与人工授精技术研究

随着牛肉价格的持续走高,广西博白县牛肉市场日益兴旺,在带动养殖者增收方面发挥了重要的作用。然而,与红火的市场相比,牛品种改良与牛养殖技术却仍然处于滞后状态,已经成为限制博白县发展的突出问题。笔者从牛品种改良存在的问题及具体举措、人工授精技术操作要点展开分析,旨在为广西博白县牛品种改良与人工授精技术革新提供帮助。     

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。