论文部分内容阅读
牛“烂蹄病”发生面广,危害严重,对农牧业生产影响较大。本文在前人工作的基础上,通过主要病区的调查,对本病发生规律作进一步的探讨,力求在防治工作中起到较好效果。一、牛“烂蹄病”分布区域据七十年代初记载,本病已遍布欧洲、亚洲、北美洲等四大洲的八个国家(意大利、巴基斯坦、印度、中国、日本、美国、澳大利亚和新西兰)。牛“烂蹄病”分布区域的特点是: 1.欧、亚各国主要发生于水稻产区。如巴基斯坦德格纳拉地区,印度旁庶普邦及中国南方各省;美国科罗拉多、密苏里、密西西比及佛罗里达州;澳大利亚、新西兰等国则多集中在盛产苇状羊茅草的牧地。 2.病区处在东径8—177°,西径90—95°,
Cattle “bad foot disease” occurred a wide range of serious harm to agriculture and animal husbandry production. Based on the previous work, through the investigation of the main ward, this article explores the law of the occurrence of this disease further, and tries to play a good effect in the prevention and control work. First, the cattle “bad foot disease” distribution area According to the early 70s records, the disease has been spread across eight continents in Europe, Asia, North America and other four continents (Italy, Pakistan, India, China, Japan, the United States, Australia and New Zealand ). Cattle “rotten disease” distribution area is characterized by: 1. Europe and Asia countries mainly occur in rice producing areas. Such as Pakistan’s Degenala region, India’s Shuppu and southern China provinces; the United States Colorado, Missouri, Mississippi and Florida; Australia, New Zealand and other countries are mostly concentrated in the rich reed forage grassland. 2. Ward in the east path 8-177 °, the western diameter of 90-95 °,