问题描述：
英语翻译
摘要：跛行病是奶牛常发的一种疾病,较常见的有外伤性、细菌、病毒性或由营养不良等原因造成.不但影响奶牛正常饲养管理,而且还会导致奶牛生产性能明显下降; 如果处理不当甚至会导致奶牛淘汰.由于奶牛肢蹄病发病原因复杂、发病率高、病程较长、治愈困难,对其生产性能和使用寿命具有严重的影响.因此,该病给奶牛业造成了巨大的经济损失.本实验通过5分跛行评价法,对黑龙江某规模化奶牛场进行了跛行评价.分析饲养环境与管理措施对奶牛跛行的影响.
关键词：跛行评价,蹄病,饲养管理
问题解答：
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仅供参考：
An Investigation into the Situations of Lameness Disease in a Scaleful Diary Farm in Helongjiang Provcince
Summary: Lameness is a common disease among milk cows that is caused by external injuries, bacterial or virus infections, or mal-nutrition. Lameness not only affects milk cows with their breeding and management, but also significantly lowers their productivity. If not dealt with propertly, milk cows with lameness may eventually be laid off. However, limping diseases of a milk cow have complicated causes, higher rates of incidence, longer course, and are often hard to cure, which then seriously affects the milk cow's productivity and life. As a result, such disease can cause huge economic loss to diary cattle industry. By using a 5-grade lameness evaluation method, an experiment was carried out at a scaleful diary farm in Heilongjiang Province, in an effor to analyze the impact of ranching environment and management measures towards lameness of cows.
Keywords: Lameness evaluation, limping disease, breeding management
