大口鲶最适饲料的配比研究

通过均匀试验设计 ,在 (2 5± 0 .5 )℃的情况下 ,利用不同配比的人工配合饲料饲喂大口鲶。试验结果表明 :添加鲜鱼肉的添加量达到 5 0 %～ 75 %时 ,无论是体长还是体重的增加都在试验条件下最好 ;单纯的粉状饲料和单纯的鲜鱼肉养殖饲料成本都相对较高。     

高位池和传统池塘养殖大口鲶肌肉营养品质的比较

为探究高位池与传统池塘养殖大口鲶肌肉营养品质的差异,试验选取同一地区不同养殖模式相同饲料源投喂的大口鲶.两组分别选取5条体重相近的鱼,测定形体指标,肌肉常规营养成分及氨基酸含量.结果 显示:高位池组大口鲶的肥满度和脏体比均显著低于传统池塘组(P＜0.05);高位池组大口鲶肌肉中除粗脂肪含量显著低于传统池塘组外(P＜0....     

几种名特优鱼的稻田养殖技术

一、南方大口鲶的养殖 在秧苗返青后,每亩可放规模10cm的大口鲶鱼种50尾,搭配其它家鱼200尾,按常规的稻田养殖方法管理,每亩可获大口鲶成鱼30kg以上,其它成鱼100～150kg。 1.饲料投喂:大口鲶的饲料有蚯蚓、动物内脏等,其吃食主要在清晨和夜晚进行。一般日投饵两次,即清晨6:00左右一次,下午5:00再投一次。 2.鱼病防治:如发现病情,将全部鱼种集中,用20mg/kg高锰酸钾溶液浸洗15min,将鱼散开后换新水,第2～4d用灭虫灵1mg/kg全池泼洒,连用三天,注意换水。     

稻田养殖几种名特优鱼的操作技术

(一)南方大口鲶的养殖在秧苗返青后,每0.067公顷可放规格10厘米的大口鲶鱼种50尾,搭配其他家鱼200尾,按常规的稻田养殖方法管理,每0.067公顷可获大口鲶成鱼30千克以上,其他成鱼100～150千克。1.饲料投喂:大口鲶的饲料有蚯蚓、动物内脏等,其吃食主要在清晨和夜晚进行。一般日投饵2次即清晨6∶00左右1次,下午5∶00再投1次。2.鱼病防治:如发现病情后,将鱼种集中,用20×10-6高锰酸钾溶液浸洗15分钟,将鱼散开后换新水,第2～4天用灭虫灵1×10-6全池泼洒,连用3天,注意换水。(二)鳜的养殖1.放养规格及密度:一般每0.067公顷稻田放养规格3～5厘米的鳜8…     

猪用配合饲料的配制

生猪养殖中主要日粮供给就是配合饲料,如果配合饲料营养价值不全或各种营养比例不合理,都会造成不必要的经济损失。从全价配合饲料的优点、配方设计、配制原则、动物能量需求、配制过程中的注意事项等方面,对猪用配合饲料进行较为全面的论述,详细地说明配合饲料与养殖生产中的关系,以提高生猪养殖中的经济效益。     

猪用配合饲料的配制——猪用配合饲料的配制

生猪养殖中主要日粮供给就是配合饲料,如果配合饲料营养价值不全或各种营养比例不合理,都会造成不必要的经济损失。从全价配合饲料的优点、配方设计、配制原则、动物能量需求,配制过程中的注意事项等方面．对猪用配合饲料进行较为全面的论述,详细地说明配合饲料与养殖生产中的关系,以提高生猪养殖中的经济效益。     

不能混用畜禽配合饲料

配合饲料是根据畜禽的不同种类、年龄对营养的需要,由多种饲料原料科学配合而成的一种配合饲料。但有些养殖专业户却随意或因所需饲料紧缺而用猪配合饲料喂鸡,或用对鸡配合饲料喂猪等,这样做是极不科学的。不仅降低了饲料的利用率,而且还会导致某些疾病的发生。     

合理投喂鱼用配合饲料

<正>鱼用配合饲料因其营养全面、适口性好、报酬率高等特点在广大水产养殖户中越来越得到青睐,同时,由于当前饲料成本在整个养殖过程中占有重要比例,所以通过合理投喂配合饲料来提高饲料利用率,降低养殖成本是非常明智的选择。下面着重就投喂技术提出几点建议以供参考:     

水产养殖全价配合饲料的选择、鉴别与贮存

随着池塘高密度养殖和大水面网箱集约化养殖规模的不断扩大,水产养殖越来越依赖于全价配合饲料。集约化养殖的饲料成本一般要占整个养殖场成本的70%以上,如果配合饲料的选用不当或管理不善,就会大大降低经济效益。因此,科学选用全价配合饲料进行合理保管,是提高水产养殖经济效益的关键。1全价配合饲料的选择11根据养殖的水产品种和不同养殖时期选择饲料不同品种及规格的全价配合饲料,其成分含量和营养价值是不相同的,因此所适用的养殖鱼类也就不同。比如,肉食性鱼类对蛋白质的需要量要比杂食性鱼类高,杂食性的又要比草食性的高,养殖鳗鱼、罗…     

大口黑鲈营养生物学及配合饲料研究进展

大口黑鲈养殖技术的突破和提升及养殖模式的转变,促使其经济效益提高,养殖产业不断稳定发展。目前关于大口黑鲈营养生物学的研究相对缺乏,在我国专用人工配合饲料的研制和使用尚未普及。长期以来,养殖大口黑鲈都是用直接投喂冰鲜鱼的方式,严重制约养殖业的发展。攻克大口黑鲈人工配合饲料研难关,开发合适的大口黑鲈全程使用人工配合饲料,一直以来是水产营养研究与饲料企业生产的难题之一。试验主要就国内外有关大口黑鲈营养生物学与配合饲料的相关研究做简要综述,为高效人工配合饲料的研制和开发提供依据。     

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。     

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。     

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。