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通过人工输入冷冻精液改良本地绒山羊,可以使绒山羊质量有很大提高,而且人工输精也是实现绒山羊高产优质的重要措施之一。现将笔者总结出的提高绒山羊冷冻精液配种受胎率的技术措施介绍如下,供同行参考。 相似文献
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辽宁绒山羊是我国优秀的产绒山羊品种。近年来,全国各地纷纷引进辽宁绒山羊优质种羊,但由于优质的种羊数量有限,远远不能满足市场的需求。在这种形势下,推广辽宁绒山羊细管冻精是弥补辽宁绒山羊种羊数量缺口的切实可行的有效办法。同时,优质冻精的推广还可以降低绒山羊养殖户的改良成本,加快改良进度,提高改良效果,增加辽宁绒山羊养殖的经济效益。从2005~2008年,共推广辽宁绒山羊优质细管冻精近20万剂,改良低产绒山羊10万只以上,创造社会效益近亿元,有力地促进了绒山羊产业的结构调整和产业升级,带动了大批农牧民的增收致富。这一改良成绩主要得益于辽宁省辽宁绒山羊育种中心采取的有关辽宁绒山羊细管冻精推广模式的有效落实。 相似文献
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天祝县绒山羊是河西绒山羊的一个分支.结果表明,在同等条件下,周岁柴土F1和阿土F1比土种周岁山羊每只增绒50 g,增肉1.2kg以上,多增产值23.2元,各项繁殖生产指标有明显提高,建议在生产中大力推广应用柴达木绒山羊和阿白绒山羊改良当地土种山羊。 相似文献
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柴达木绒山羊是青海省近几年育成的地方优良牲畜新品种之一,主要分布在柴达木盆地及周边农牧区。都兰县作为柴达木绒山羊的主要育种区,近两年通过采取加大对绒山羊改良工作的技术投入,加强本品种内选育,适当扩大改良面积等措施,柴达木绒山羊现已成为全县牧业经济结构调整中的支柱产业和优势畜种。截止2003年初,全县共存栏各类山羊194229只,其中柴达木绒山羊88490只,占山羊总数的45.56%。笔者就都兰县的柴达木绒山羊品种的巩固提高工作现状,谈一谈对柴达木绒山羊育种工作的一些认识。 相似文献
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甘泉县畜牧站在东沟乡设立陕北白绒山羊养殖示范点,选择特级优秀种公羊10只,使用自制的冷精颗粒、细管冷冻精液及鲜精开展陕北白绒山羊人工授精技术工作。据统计,共配白绒山羊2000多只,取得了较好的配种效果,对当地白绒山羊选育提高生产了较大的推动作用。为此,我们进行了统计和分析,以便进一步推广应用。 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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应用光镜和透射电镜技术,观察了3~6月龄比格犬甲状腺的显微和超微结构。结果表明,比格犬甲状腺实质由滤泡和滤泡旁细胞构成。滤泡呈圆形或椭圆形,直径20.22~220.00μm,平均90.80μm;由单层立方上皮细胞围成,细胞高度3.04~7.11μm,平均5.18μm,电镜下可见功能状态不同的两型滤泡上皮细胞;滤泡旁细胞很多,直径4.40~8.82μm,平均6.23μm,位于滤泡之间或镶嵌于滤泡上皮细胞之间,也可聚集在一起形成滤泡样结构,胞质内含有大量的分泌颗粒,电镜下也可见两种类型的滤泡旁细胞。 相似文献
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本试验旨在研究两种绿头鸭(白羽绿头鸭和绿头鸭)肌肉营养组成和价值,为绿头鸭肉产品的开发利用提供基础数据和理论依据。选择白羽绿头鸭和绿头鸭60只(每个品种各30只,公母各半),依照国家标准测定胸肌粗蛋白质、粗脂肪、胆固醇含量及氨基酸、脂肪酸、微量元素和维生素的组成和含量,并对胸肌进行氨基酸评价及脂肪酸营养价值评价。结果显示,白羽绿头鸭肌肉粗蛋白质含量显著低于绿头鸭(P<0.05);两种绿头鸭肌肉中均检测到17种含量大于0.01%的氨基酸,其中白羽绿头鸭肌肉苏氨酸、组氨酸、丝氨酸和脯氨酸含量显著高于绿头鸭(P<0.05),赖氨酸、谷氨酸和精氨酸含量显著低于绿头鸭(P<0.05);检测到13种含量均大于0.01%的脂肪酸,其中白羽绿头鸭硬脂酸和油酸含量显著低于绿头鸭(P<0.05);检测到9种矿物质元素(钠、镁、钾、钙、锰、铁、铜、锌和硒),两种绿头鸭差异不显著(P>0.05);检测到8种维生素,白羽绿头鸭肌肉维生素B1含量显著高于绿头鸭(P<0.05),维生素D和维生素E含量显著低于绿头鸭(P<0.05)。两种绿头鸭肌肉氨基酸比例接近世卫组织推荐的理想模式,富含人体所需的矿物质元素和维生素,具有广阔的开发利用前景。 相似文献
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R. Cole J. Schumacher R. Wilhite J. Newton J. Schumacher 《Equine Veterinary Education》2014,26(2):93-97
The accuracy of a technique for centesis of the bicipital bursa using a 9 cm, spinal needle inserted through the tendon of the biceps brachii muscle was evaluated. A veterinary radiologist who had no previous experience of performing centesis of the bicipital bursa and an equine clinician who had little experience in performing the procedure, attempted to inject a solution of aqueous radiopaque contrast medium into the bicipital bursae of 8 horses using an approach in which the bursa was accessed by directing a needle through the tendon of origin of the biceps brachii muscle until cartilage in the lateral portion of the intertubercular groove was contacted. Centesis of the bicipital bursa using this approach in horses having no signs of disease of the bursa was consistently successful if the cubital joint was flexed and the scapulohumoral joint extended. 相似文献
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莱克多巴胺属于β-兴奋剂,在动物性产品中残留量过高会危害人类健康。本试验采用酶联免疫法来检测甘肃部分地区猪肉中莱克多巴胺的残留量,根据酶联免疫试剂盒检测出猪肉中莱克多巴胺的检出限为24 μg/kg,以莱克多巴胺的6种标准品测得莱克多巴胺的标准曲线,以此检测甘肃部分地区猪肉中莱克多巴胺的残留量是否超出检出限,并分析不同地方莱克多巴胺残留量存在差异性的原因。 相似文献
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Reasons for performing study: Clinical experiences indicate that centesis of the lateral compartment of the femorotibial joint is often unsuccessful. Objective: To determine the accuracy of 2 published and 2 unpublished techniques of centesis of the lateral compartment of the femorotibial joint. Hypothesis: It was hypothesised that a drug can be administered into the lateral compartment of the femorotibial joint via a diverticulum of this joint that surrounds the medial aspect of the long digital extensor tendon and that this technique is more accurate than described techniques of centesis of this compartment. Methods: Twenty‐four stifles of 12 horses were divided equally into 4 groups and a radiocontrast medium injected into the lateral compartment of the femorotibial joint of each group using a hypodermic needle inserted: 1) caudal to the lateral patellar ligament and proximal to the tibial plateau, 2) caudal to the long digital extensor tendon and proximal to the tibial plateau, 3) between the long digital extensor tendon and bone of the extensor groove of the tibia or 4) directly through the long digital extensor tendon until it contacted bone. Twelve veterinary students who had no experience using any of these techniques performed the injections. Accuracy of each technique was determined by examining radiographs obtained after injecting the contrast medium. Results: The most successful technique for arthrocentesis was by inserting a needle through the long digital extensor tendon. This approach was successful in all attempted cases, whilst other techniques had lower rates of success. Conclusions: The lateral compartment of the femorotibial joint can be accessed accurately by inserting a needle through the long digital extensor tendon as it lies within the extensor groove. Other techniques may not be as accurate for clinicians inexperienced in arthrocentesis of the lateral compartment of the femorotibial joint. 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