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1 饲料营养标准缺乏制约养鹅业发展
提起养鹅业,技术不成熟、不配套是制约行业发展的重要因素,其中一个重要的问题是鹅的饲料营养标准缺乏。长期以来,我国畜禽营养与饲料研究课题一直集中在猪、鸡和奶牛等方面,严重缺乏水禽营养与饲料领域的研究课题和研究团队,《肉鸭饲养标准》2012年5月1日开始正式实施,而鹅的饲养标准目前仍是一大空白,鹅专用饲料生产企业少之又少,产能严重不足。 相似文献
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我国肉鹅产业发展应重视的问题与建议 总被引:1,自引:0,他引:1
肉鹅产业是我国农业中十分重要的支柱产业之一。鹅肉、鹅绒、鹅油是经济价值极高的食品、纺织、化工原料。鹅肉及其加工产品风味独特、营养丰富、安全、低无残留,深受我国消费者欢迎,市场需求与发展潜力巨大。但是,目前我国肉鹅产业面临着巨大挑战。概括为:规模化与产业化水平低。表现为种鹅饲养、种蛋孵化、商品鹅饲养、饲料加工、肉鹅屠宰加工、食品加工分离,公司+基地+农户的一条龙生产模式尚未形成; 相似文献
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肉鹅配合饲料饲喂试验 总被引:4,自引:0,他引:4
本试验旨在用配合饲料代替原粮作为精料,养殖肉鹅,减少饲料消耗,降低饲养成本,提高经济效益。多年来,养鹅业一直沿袭传统的养殖方式,生产技术落后,以单一原粮作为精料补充,营养不平衡、生产率水平很低,饲养期长,肉鹅达2.5公斤一般需90—110天左右,用原粮8~9公斤,经济效益差。为此, 相似文献
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江、浙、沪、皖等地区饲养太湖种鹅较广泛。1987年我省太湖鹅饲养量已达3000多万只。但目前我国尚未制定太湖鹅的饲养标准和配合饲料质量标准,种鹅习惯采用放牧加补充精料的饲养方式,生产水平较低。在这种情况下,我们对太湖种鹅产蛋期饲料配方进行了试验研究,旨在探索太湖种鹅产蛋期营养需要,制定合理的饲料配方,提高养 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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