共查询到20条相似文献,搜索用时 15 毫秒
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J Quackenbush 《Veterinary Clinics of North America: Small Animal Practice》1985,15(2):395-402
The death of a family pet can be a difficult and upsetting experience. In this article, human reactions after pet death are described as a normal bereavement sequence and a case study is used to describe and explain major issues associated with a pet's death. 相似文献
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在低水平豆粕型母猪哺乳期饲料中添加合成赖氨酸以平衡日粮的营养水平,不会对母猪当前和以后的生产性能产生负面影响,虽然合成氨基酸的成本增加了,但整体生产成本能够下降。 相似文献
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张劳 《国外畜牧学(猪与禽)》2010,30(4):8-11
在奶牛业中,像单核苷酸多态性(Single-NucleotidePolymorphism,SNPs)基分型、基因组选择和基因组育种值这样的术语已经存在多年了。在养猪业中,与猪基因组序列测定相关的技术起步相对晚些,但是现今进展顺利。我们目前进展如何,并且该技术对养猪业的贡献如何? 相似文献
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饲料防霉问题不容忽视 总被引:1,自引:0,他引:1
近年来 ,随着我国畜牧业的飞速发展 ,饲料产销量大幅度增加 ,因此饲料的保藏工作必须予以重视。据统计 ,现在全世界每年损失的饲料有一半以上系由霉变所致 ,我国饲料的防霉问题仍没有彻底解决 ,每年的损失惊人。怎样才能防止饲料发生霉变呢 ?实践证明 ,最有效的方法之一是在饲料中添加防霉剂。1 饲料防霉剂的主要品种饲料用防霉剂是指能降低饲料中微生物的数量、控制微生物的代谢和生长、抑制霉菌毒素的产生、预防饲料贮存期营养成分的损失、防止饲料发霉变质并延长贮存时间的饲料添加剂。目前添加使用的主要品种有 :1 1 苯甲酸和苯甲酸… 相似文献
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任颖 《国外畜牧学(猪与禽)》2011,31(1):14-15
干酒糟及其可溶物(DDGS)是推向饲料市场的相对较新的饲料原料,不过所谓的“新”主要指在欧洲和亚洲的应用前景。在美国,2005年大约有900万吨的DDGS被当作饲料使用,其中75%~80%用于反刍动物,大约20%用于猪日粮。 相似文献
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猪繁殖与呼吸综合征(PRRS)是一种让猪农感到头疼的疾病,无论是临床型还是亚临床型均如此.本文将介绍比利时为查明同时接种多种呼吸道疾病疫苗是否会起作用所进行的研究.结果表明接种多种疫苗确实可起到有效的预防作用. 相似文献
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This paper provides information on the safety of ultrasonic diagnostic procedures as currently used in veterinary practice. The known mechanisms of action are described and selected literature on biological effects of ultrasound is reviewed. Current international consensus is presented on the safety of medical ultrasound with respect to thermal effects. To date, there is no independently verified clinical evidence that the level of exposure delivered to the tissues during scanned grey-scale (‘B-mode’) imaging has any adverse effects. Lung haemorrhage has been observed in animal experiments using diagnostic exposures, but the effects have not been reported in the foetus. Equipment that uses pulsed Doppler transmits higher acoustic outputs in a stationary beam, and can produce temperature increases that may have significant biological consequences. When considering sonographic and pulsed Doppler examinations of the prenatal animal, the safety margins are small and the operator should be aware of the acoustic output of the equipment, the exposure time, and the sensitivity of target tissues. 相似文献