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7月初,超大现代农业集团首家从南非引进肉用绵羊品种南非白头杜泊肉绵羊.该公司引进的南非白头杜泊肉绵羊种羊共20只,共投资50万元人民币. 相似文献
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相同饲养条件下不同品种羔羊生长速度效果观察 总被引：4，自引：0，他引：4
利用杜泊绵羊和小尾寒羊进行杂交所生的一代、纯种小尾寒羊、纯种黑头杜泊3个不同的品种,在同样的营养水平、饲养管理条件下进行同样培育,观察其不同品种各项生长发育指标的不同之处,从中找出差距。通过对不同品种的出生重0~60日龄的生长速度测定结果统计,杜寒杂一代出生重为5.16±1.19Kg,小尾寒羊出生重为3.85±0.99Kg,纯种杜泊出生重为4.22±0.87Kg,杜寒杂一代比其它纯种的出生重都大,从60日龄平均日增重看,杜寒杂一代最高,为348.67g。 相似文献
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近年来，杜泊绵羊因为适应性强、生长速度快、饲料报酬高等特性，市场前景被普遍看好，受到了各地广大养殖户的关注。纯种杜泊绵羊引进中国时间较晚，多数农户对其品种特性、外貌特征尚不十分清楚，再加上目前社会上优质良种数量还不多，假、劣种羊充斥市场，多数是以二、三代杂交羊冒充纯种。 相似文献
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为实现鄂温克旗养羊业向高效肉羊产业方向发展。2001年9月鄂温克旗引进由澳大利亚培育的最新肉用绵羊品种(原产地南非)杜泊肉用绵羊种公羊。利用杜泊种公羊,采用绵羊人工授精技术与呼伦贝尔羊进行杂交,利用杜泊杂交羔羊良好的杂交增重优势培育杂交一代商品羔,以加快鄂温克旗养羊业的增效、牧民增收,形成通过引进良种、依靠科技推广,进行商品羔生产、销售的肉羔生产模式。1杜泊肉用绵羊的优良特性杜泊肉用绵羊原产地为南非,是由澳大利亚培育出来的最新肉用绵羊品种,该品种羊具有以下优良特性:①产肉率高,繁殖性能强。繁殖期不受季节限制,产羔… 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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