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缓解蛋鸡夏季热应激的措施 总被引:1,自引:0,他引:1
田允波 《江西畜牧兽医杂志》1996,(2):32-33
缓解蛋鸡夏季热应激的措施田允波(云南农业大学动物科学技术学院)环境温度是影响蛋鸡生产性能的重要因素,蛋鸡的最适温度为24~27℃,气温过高则引起蛋鸡热应激,气温愈高,热应激反应愈剧烈,损失愈严重。在炎热环境条件下蛋鸡的饲养管理是当今世界养鸡业中的一大... 相似文献
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卢卓茹 《河南畜牧兽医(综合版)》2014,(7):18-19
鸡对热应激很敏感且热应激是众多应激原中最难处理的一种,是养鸡生产者需要解决的一个重要问题.因此,笔者就如何正确分析热应激对蛋鸡生产性能造成的不良影响及如何克服高温带来的困扰,提出一些切实可行的解决办法,把不利因素降到最低,以保证蛋鸡生产顺利进行. 相似文献
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蛋鸡热应激是蛋鸡养殖存在的突出问题,给蛋鸡养殖业带来了很大的损失。文章介绍了热应激对蛋鸡的危害以及通过营养调控降低蛋鸡热应激损伤,维持蛋鸡健康,提高生产性能的措施。 相似文献
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蛋鸡在饲养过程中常会受到各种应激因素的影响,其中热应激是造成产蛋鸡产蛋率下降的因素之一,研究在蛋鸡饲料中添加一定量的维生素E及中草药以增加蛋鸡抗热应激的能力.结果表明:夏季高温季节在蛋鸡日粮中添加0.02%的维生素E和1%的中草药合剂可以提高产蛋性能、降低饲料消耗、降低破蛋率、提高蛋品质并提高经济效益. 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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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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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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