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该研究针对内蒙古自治区肉牛生产中良种公牛严重缺乏的实际情况，通过详细地调查研究，应用现代育种新技术，建立和完善了良种公牛选育体系。实践证明，该体系的实施不仅对内蒙古肉牛生产的进一步发展有巨大的推动作用，同时也为内蒙古肉牛新品种的培育奠定了坚实的基础。 相似文献
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论内蒙古自治区肉牛产业化发展 总被引：1，自引：0，他引：1
通过对内蒙古畜牧业产业化经营模式的探寻和研究，试述内蒙古肉牛产业化发展存在的问题、发展战略及措施。即：建立网络化的市场体系；改良品种，进行科学繁育（建立良种肉牛产业发展模式）；建立肉牛品种改良和育肥生产基地；采用现代化肉牛屠宰工艺，加强饲养管理、缩短饲养周期。 相似文献
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笔者在调查研究的基础上,根据徐州市肉牛产业生产形势,对肉牛产业存在的问题及发展策略进行了综合述评。徐州市肉牛产业发展需在标准化和规模化生产的前提下,制定相应扶持政策,积极推广奶公牛育肥,扩大牛肉来源,进一步支持发展良种工程,加强品种改良,完善肉牛产业链建设。 相似文献
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1制定国家肉牛产业政策,建设良种繁育体系
在国家层面,制定相应的肉牛新品种中长期培育战略、良种母牛补贴、犊牛补贴、规模化育种补贴等政策,把良种化及种源基地建设放在首要位置,通过建设完善的良种繁育体系发展肉牛产业。对良种母牛实施补贴政策,对良种牛场、肉牛基地县的规模养殖户的母牛实施补贴政策,此外,一级以上母牛免费提供优质种公牛冻精两支,并免费配种,从而调动社会养牛的积极性。 相似文献
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内蒙古自治区养牛业历史悠久、基础好,具备了发展现代化内牛生产的充分条件。逐步建立健全内蒙古肉牛现代化生产体系,完善肉牛生产过程,是当前亟需解决的主要问题。针对这一实际情况,笔者对内蒙古现代化肉牛生产体系的建设进行了分析研究,旨在促进内蒙古肉牛业的进一步发展,加快肉牛的产业化发展进程。 相似文献
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《黑龙江畜牧兽医》2020,(2)
畜牧业生产在内蒙古自治区农业生产中约占一半份额,随着牛肉及其加工品市场需求的不断攀升,肉牛产业在畜牧业生产中占据着越来越重要的地位,成为内蒙古农民增收的主要来源。文章以2001—2015年数据资料为基础,利用比较分析方法对内蒙古全区及各地区肉牛生产发展变化过程、饲养方式进行了分析。结果表明:内蒙古自治区肉牛繁育、养殖水平的进步显著促进肉牛头均产肉量的增加。然而由于肉牛良种繁育体系尚未建立、养殖技术落后、肉牛规模化标准化生产尚未形成、肉牛产品附加值低、企业与养殖户间利益联结与分配机制不健全等问题的存在,阻碍了内蒙古肉牛产业升级与更深层次发展。笔者就此提出重点加强优良种质资源建设、推动规模化生产、助力肉牛加工企业实现集群化发展、挖掘潜在消费市场、实行标准化生产等对策建议。 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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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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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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Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献