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W.D.Willms  赵萌  韩国栋 《草业科学》2004,21(12):99-103
放牧管理者面临的挑战是如何平衡家畜生产与草地的其他价值,这些价值包括野生动物资源以及那些感觉不到的其他方面的价值.许多的这些价值受到放牧管理的影响,放牧后植物的残留数量是十分重要的.植物残留物增加枯枝落叶库的大小,对草地生态系统有重要作用.枯枝落叶影响植物生长和群落结构,进而影响食草动物.或许,重要的一点是枯枝落叶使得系统稳定,促进生产循环.因此,需要寻找植物被移走和保留之间的平衡,其结果可以通过家畜生产和生态系统的健康反映.  相似文献   

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Balancing the activities of a foal with an orthopaedic injury can be challenging. Physeal fractures also provide additional complexities to consider. This commentary examines both the juxtaposition of confinement and reduced activity, and the complex features of physeal injuries.  相似文献   

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当猪舍规模变得越来越大且每个猪舍均饲养数千头猪时,随之产生的富含氮、磷、钾和其他矿物质的废水每年则高达数千吨,这越来越引起了人们的担忧,要求养猪业采取负责任的行动以减少此类污染源的呼声越来越高。  相似文献   

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随着养猪生产规模越来越大,一个猪舍内饲养几千头猪是司空见惯的事。因此人们也越来越关注每年百万吨因生猪养殖而造成的氮、磷、钾和高浓度微量元素的污染排放问题。越来越多的呼声要求养猪业承担责任以降低因养猪生产排放而造成的污染。  相似文献   

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可通过抗生素、生菌剂和有机酸的综合应用而建立和保持家禽胃肠道格兰氏阳性菌和格兰氏阴性菌之间的最佳平衡。这些物质在饲料中和饮水中的综合应用,有助于避免其中每一种单独应用时的缺点,从而改善家禽的健康状况。  相似文献   

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A 7-year-old Saint Bernard developed muscular weakness 1 year after right forelimb amputation and adjuvant cisplatin chemotherapy for osteogenic sarcoma. Clinical and laboratory findings supported a diagnosis of myasthenia gravis, and the dog had clinical improvement in response to prednisone treatment. Two additional dogs with myasthenia gravis and osteogenic sarcoma were identified by review of the medical records of the University of California Veterinary Medical Teaching Hospital. Findings indicated that myasthenia gravis or other neuromuscular transmission disorders may be associated with muscular weakness in dogs with osteogenic sarcoma.  相似文献   

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The effectiveness and suitability of legislation regarding the issue of dangerous dogs, especially those targeting so-called “dangerous breeds” (DB), have been the object of a lot of criticism. However, the shortage of scientific studies in this field makes an objective assessment of the impact of current legislation difficult. In the present study, dog bite-related incidents from Aragón (Spain) were analyzed for a 10-year periods (1995 to 2004). With the aim of assessing the impact of the Spanish Dangerous Animals Act on the epidemiology of dog bites, data from the non-legislated (1995 to 1999) and the legislated period (2000 to 2004) were compared in 2 different areas (low- and high-populated areas). According to the results, the population density did exert a significant effect on the incidence of dog bites, whereas the legislation in force did not. Popular breeds such as the German shepherd and crossbreed dogs accounted for the great majority of the incidents during the 2 periods of study. Specifically, the German shepherd proved to be over-represented significantly among the canine population. Dogs in the dangerous breeds list, on the other hand, were involved in a small proportion of the incidents both before and after the introduction of legislation. The present results suggest that the implementation of the Spanish legislation exerted little impact on the epidemiology of dog bites. Besides the scarce effectiveness, the results suggest that the criteria to regulate only so-called DB were unsuitable and unjustified. It is hoped that this study will be helpful in the elaboration of future regulation measures in this matter.  相似文献   

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Adapting family life cycle theory to include pets provides veterinarians with a framework for understanding and reinforcing the human-animal bond. The family genogram with pets is a practice tool that identifies all people and pets in the family, enhancing the practice of One Health at the community level.  相似文献   

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