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饲养技术和养蜂机具系统研究的形成与发展中国农业科学院蜜蜂研究所现代化研究室养蜂所成立不久就开展蜜蜂饲养技术的研究。70年代中期,在江西成立饲养研究室,开展饲养技术和养蜂机具两方面的研究。80年代后,饲养技术研究室下设饲养技术与养蜂机具两个课题组,既合... 相似文献
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蜜源植物与授粉研究历史与展望中国农业科学院蜜蜂研究所资源室蜜源组中国农业科学院蜜蜂研究所蜜源研究室成立于1963年。蜜源室成立之时就将蜜源植物和蜜蜂授粉作为这个室重点研究对象。将研究蜜源植物为养蜂生产服务、研究授粉为农业增产服务作为研究的出发点。19... 相似文献
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中国养蜂学会蜂业标准化研究工作委员会成立大会于2009年10月25日在重庆荣昌召开。会议由中国养蜂学会常务理事赵静主持。中国养蜂学会理事长张复兴宣读中华人民共和国民政部关于成立“中国养蜂学会蜂业标准化研究工作委员会”的批文并作重要讲话。中同养蜂学会常务副理事长、中国农业科学院蜜蜂研究所所长吴杰宣读该委员会成员提议名单并提请大会审核。经大会表决, 相似文献
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<正>《中国蜂业》创刊之初叫《中国养蜂杂志》,自1934年1月创刊以来,经过抗日战争、解放战争、下放等历史变迁,几度被迫停刊,但是在全国养蜂工作者的大力支持和爱护下,在中国农业科学院蜜蜂研究所的正确领导和编辑人员的努力下,到2012年7月已经出版300期。它见证了我国养蜂事业曲折的发展历程,对我国的养蜂生产和科学研究起到了巨大的推动作用。改革开放30年,我国养蜂生产稳步发展,已经成为世界第一养蜂大国。《中国蜂业》致力于宣传政府关于养蜂的方针政策和规划措施,报道养蜂科研成果和先进养蜂技术, 相似文献
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《蜜蜂杂志》2003,(10):26-27
黄文诚自从 1 950年开始参与并主持编辑《中国养蜂杂志》 (后更名为《中国养蜂》)长达 40年之久 ,经常撰文介绍国内外先进养蜂经验和科研成果 ,为推动科学饲养蜜蜂 ,普及现代养蜂知识 ,促进中国养蜂生产的发展 ,作出了积极贡献。 1 958年中国农业科学院养蜂研究所成立以后 ,他又投身蜜蜂研究工作 ,获得多项研究成果 ,并大力培养科研人员 ,注重理论联系实际 ,经常与同组研究人员下蜂场实际操作 ,并培养硕士研究生 2名 ,1 983年和 1 987年曾分别到意大利及波兰考查养蜂科研情况。他是我国蜜蜂科学研究的一名开路人。1 979年中国养蜂学会成立后… 相似文献
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蜜蜂育种研究与推广工作卓有成效中国农业科学院蜜蜂研究所育种研究室1958年中国农业科学院养蜂研究所成立后,在农业部和院所支持下,我们便开始进行了高加索蜂和意大利蜂的杂交试验;开展了蜜蜂人工授精技术的研究,并于1964年获得成功。随后设计、制造了蜂王人... 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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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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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
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乳酸杆菌作为益生菌广泛用于人和动物.本文综述了乳酸杆菌改善宿主健康的机制.乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道.文章重点讨论了乳酸杆菌表面成分(表面蛋白、脂磷壁酸和肽聚糖)与肠道受体(C型凝集素受体、Toll样受体和Nod样受体),阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制. 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