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奶牛酮病与隐性酮病发病规律的调查分析 总被引:11,自引:1,他引:10
奶牛酮病与隐性酮病发病规律的调查分析○北京北郊农场奶牛公司(102209)李强○北京奶牛中心朱玉林奶牛酮病是发生在高产奶牛群中的代谢性疾病。近年来,随着高产奶牛群体的出现,其发病率呈上升趋势。我们这个调查,以奶牛管理和生产人员技术水平较高、诊治记录准... 相似文献
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奶牛酮病早期监控技术的效果 总被引:5,自引:1,他引:4
奶牛酮病早期监控技术的效果北京市奶牛研究所(100085)萧定汉,李兰华北京市永乐店农场渠头牛场宛绍月,陈德民酮病为奶牛特别是高产奶牛的常发病。随着奶产量的不断提高,隐性及临床型酮病的发病率相应增加。1991~1993年,经我们对成年母牛600头、年... 相似文献
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酮病是高产奶牛产后3-6周常见的代谢眭疾病。随着奶牛生产水平的不断提高,酮病发病率也逐年上升。酮病发病的原因复杂,发病后造成的危害很大,因此研究酮病的发病特点,建立一套完善的酮体检测制度和防治方法,显得尤为重要。 相似文献
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探索奶牛酮病发病原因、发病规律及其对生产性能的影响,对986头围产期奶牛进行跟踪调查分析。结果表明,奶牛酮病发病率为31.74%,死亡率为4.15%;秋季发病率最高,可达37.4%,其次是冬季和夏季,春季发病率最低;随着胎次、年龄和产乳量的增加,奶牛酮病的发病率明显增高;在第1个泌乳月奶牛酮病的发病率最高,可达50.43%;日粮种类和微量元素越少,奶牛酮病就越容易发生;奶牛发病后受胎率明显降低;发病后产乳量、乳脂率、乳蛋白率、乳糖率和乳干物质比发病前均明显降低,差异显著(P〈0.05)。奶牛酮病发病具有一定的规律性,且可降低奶牛的繁殖性能、产奶量和乳品质。 相似文献
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<正> 发病原因酮病又叫酮血病、酮尿病,是由于饲料中糖和产糖物质不足,以致反刍动物体内物质代谢和能量生成障碍而发生的以酮血、酮尿、酮孕和低血糖为特征的碳水化合物与脂肪代谢障碍性疾病,致使大量酮体在体内蓄积。主要发生于奶牛,特别是高产奶牛发病率较高。发病后产奶量急剧下降,发情迟缓,配种率低。所产犊牛发病率和死亡率提高,有些病牛久治不愈或反复发病,终致淘汰,给奶牛生产造成巨大损失。饲喂富含蛋白质和脂肪的饲料过多 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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以国际标准强毒R株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离MG,并收集感染鸡所产蛋分离MG。结果表明,人工感染48小时后上、下呼吸道及肺已被全面感染,96小时气囊已被感染,120小时输卵管已能分离到MG,卵巢始终分离不到MG。人工感染鸡自144小时便能在其所产蛋中分离出MG。药物治疗能在72小时内消除感染,油乳剂苗则需24天后逐渐降低蛋内MG分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内MG,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
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