共查询到20条相似文献，搜索用时 234 毫秒
1.
2.
3.
4.
何海碧 《养殖与饲料．饲料世界》2019,(4):58-59
非淀粉多糖酶是消除抗营养因子作用的主要饲料添加剂,该类制剂目前在畜禽养殖中越来越受到青睐。本文介绍了非淀粉多糖酶的作用机理,并分别简述了纤维素酶、木聚糖酶、葡聚糖酶、甘露聚糖酶等非淀粉多糖酶在畜禽生产中的应用效果。 相似文献
5.
酶制剂在畜牧业的应用已越来越广泛，其主要特点是能促进畜禽对营养的消化吸收，提高饲料的有效利用率和畜禽的生产性能。为了验证多种复合酶制剂在畜禽饲料中使用的效果，本试验选用英恒生物饲料有限公司生产的复合酶制剂对断奶仔猪与小猪进行了饲喂探索。现将试喂情况报告如下。1材料与方法1．l酶制剂选用江门生物技术开发中心英恒生物饲料有限公司生产的（猪用型）英恒饲料复合酶。该酶主要成分含β-葡聚糖酶、木聚糖酶、蛋白酶，淀粉酶和纤维素酶等15种酶。1．2试验猪试验猪选用杜长大七日龄断奶，预试10d的仔猪SO头和杜长大SO日龄，… 相似文献
6.
7.
8.
黑曲霉产木聚糖酶的应用特性研究 总被引：2，自引：2，他引：0
木聚糖酶能降解木聚糖中的β－１，４糖苷键，在饲料中能降低木聚糖的抗营养作用，提高养分消化利用率，开发非常规谷物资源，提高畜禽生产性能，减轻粪便污染；在造纸业中，能减少纸浆预漂白中有毒物的用量，可大大降低环境污染物的排放，解决造纸业的严重污染问题。其在饲料、食品、造纸工业中得到广泛应用。不同行业对酶的作用特性有不同要求；不同来源的木聚糖酶具不同特性，适用的范围也不一样。本文对所选育的黑曲霉产生的木聚糖酶的部分与应用相关的特性进行了研究，结果显示该酶制剂适合应用于饲料及食品中。１材料和方法１．１木聚… 相似文献
9.
木聚糖是植物细胞中主要的半纤维素成分,具有抗营养作用。木聚糖酶是木聚糖的专一降解酶,可将木聚糖分解为木寡糖。在鸡饲料中添加木聚糖酶可以促进畜禽的生长,提高内源性消化酶活性和饲料转化率,破坏植物细胞壁从而促进养分消化吸收,改善肠道形态结构,减少肠道微生物数量,降低畜禽发病率。 相似文献
10.
11.
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
12.
13.
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
14.
15.
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
16.
17.
18.
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
19.
20.