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不同常温保存稀释液对猪精液保存效果的影响 总被引：1，自引：0，他引：1
本研究利用3种不同的常温保存稀释液对猪精液进行常温保存,测定了精子活率、有效存活时间、生存指数、pH值以及总抗氧化能力(T-AOC)和丙二醛(MDA)活性。结果表明:3号稀释液稀释后精子活率在第3天和第5天均显著高于其他2种稀释液(P<0.05);精子有效存活时间和生存指数显著高于2号稀释液(P<0.05);pH值在精液稀释后的第4天显著高于2号稀释液(P<0.05)。精子T-AOC在第3天和第4天显著高于1号稀释液(P<0.05),但与2号稀释液差异不显著(P>0.05);3种稀释液之间精子MDA变化差异不显著(P>0.05)。因此,3号稀释液对精子的保存效果最好,有利于猪精液的常温保存。 相似文献
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为了研究精液稀释液对绵羊鲜精超长时间保存效果的影响,试验选择萨福克和杜泊公羊精液分别在不同季节采用专用稀释液处理并在0℃冰水混合物状态下保存,检测不同时间的鲜精顶体完整性及精子活率,同时进行人工授精,统计受胎率。结果表明:萨福克公羊精子活率在1~15 d缓慢下降;而杜泊公羊精子活率在保存第6天和第15天有一个相对快速下降的过程;5~9 d内萨福克公羊精子活率变化较为平缓,精子活率均在0.70以上;0~3 d精子顶体完整性高于6~12 d,但差异不显著(P0.05);第15天精子顶体完整性显著低于0~12 d(P0.05)。春季第9天和第12天保存的精子活率显著高于秋季(P0.05)。利用0~12 d保存的精液人工授精后,绵羊受胎率可达到70%以上,保存15 d的精液受胎率显著下降(P0.05)。说明专用稀释液能超长时间(12 d)保证精子活率,并且在春季保存效果优于秋季,受胎率得到保证。 相似文献
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选用3种稀释液配方分别对6头种公牛精液进行稀释、封装、冷冻,并检查种公牛冻精解冻后的精子活力、畸形率、顶体完整率、冻后废弃率、存活时间及镜检感光度.结果表明：3种不同稀释液配方对种公牛精液冻后活力影响差异均显著（P＜0.05）,Ⅰ稀释液生产冻精的畸形率极显著高于Ⅱ稀释液和Ⅲ稀释液（P＜0.01）,3种稀释液冻精精子顶体完整率之间差异均极显著（P＜0.01）,Ⅲ稀释液与Ⅰ稀释液和Ⅱ稀释液间对牛精液所生产冻精的冻后废弃率影响均差异显著（P＜0.05）,Ⅰ稀释液与Ⅱ稀释液和Ⅲ稀释液间对牛精液所生产冻精的存活时间影响差异也显著（P＜0.05）,Ⅲ稀释液生产的冻精精子感光度优于Ⅰ稀释液和Ⅱ稀释液,其余各项指标差异均不显著（P＞0.05）.因此,可用自配Ⅱ稀释液替代进口专用Ⅲ稀释液. 相似文献
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为研究经过冷冻干燥处理的粉剂稀释液与原稀释液对绵羊精液保存的效果,采集6只盘羊与巴什拜羊杂交公羊的精液,分别用粉剂稀释液(A组)和原稀释液(B组)稀释降温后的冰水混合物长期保存,在第0、1、3、6、9和12天分别对精子活率和顶体完整率进行检测,并统计低温保存第9天的精液进行人工授精的受胎率。结果表明:粉剂稀释液与原稀释液低温长时间保存绵羊精子,在保存第9天的精子活率均能达到0.5,顶体完整率均高于65%,粉剂稀释液与原稀释液对精子活率和顶体完整率的保护能力无明显差异(P0.05);粉剂稀释液与原稀释液在低温保存第9天后进行人工授精,受胎率分别为66.9%和67.8%,两者受胎率差异不显著(P0.05)。说明稀释液冻干粉剂与液体稀释液低温保存绵羊精子具有相同效果。 相似文献
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为了探究不同浓度维生素E在负压(-0.04 MPa)条件下对猪精液常温(17℃)保存效果的影响，试验将猪精液分为A～D组，分别在含0,0.1,0.5,1 mg/mL维生素E的Modena基础稀释液中保存，用全自动精子质量分析仪检测猪精子质量指标及畸形率，用相应试剂盒检测总抗氧化能力(T-AOC)及H2O2含量，用酸度计检测猪精液pH值。结果表明：在精液保存至第7,11天时，C组精子活率显著高于其他各组(P<0.05),且在保存至第1～5天时精子活率高于60%;在精液保存期间，C组精子活力高于其他组，且在第9天显著高于其他组；在精液保存期间，C组精子平均直线速度、平均曲线速度、平均路径速度及鞭打频率均高于其他组，畸形率低于其他组；在精液保存至第9天时，C组精子T-AOC显著高于其他组(P<0.05);在精液保存至第9,11天时，C组H2O2含量显著低于其他组(P<0.05);在精液保存期间，C组pH值的下降趋势相较其他组最缓慢，pH值最高，使猪精子处于较为适宜的弱酸环境中。说明将0.... 相似文献
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为了提高阿拉善型绒山羊优质种公羊利用率,首先对生产中常规精液稀释液配方进行比较试验,分别用4种常用稀释液对3只配种公羊的精液4倍稀释后进行常温稀释保存试验,对精子活率进行检测,从中筛选出最优配方,再进行不同pH及不同蔗糖浓度的优化试验。结果表明,在4种常用精液稀释液中,A2组效果明显优于其他各组(P0.05),保存时间为60h;保存精液的最适pH为B3组的6.3,在12h~24h之间及48h~60h之间B3组精子活率显著(P0.05)高于其他两组;在改进后的精液稀释液配方中,最适蔗糖浓度为C2组的12mg/mL和C3组的18mg/mL,两组精子活率差异不显著(P0.05),保存时间为78h。这有利于在内蒙古草原上长距离进行精液运输,有利于优质种公羊的利用率提高。 相似文献
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《中国畜牧兽医》2020,(6)
为了完善中国南方地区鸡场公鸡精液的保存技术、提高精液的利用率,本试验研究了在低温(4℃)保存的条件下,不同的保存时间(0、4、8、24 h)、不同的稀释液配方(原精液、配方Ⅰ和配方Ⅱ)对精液的精子活力变化以及人工输精繁殖效果的影响。选用33周龄黄鸡母鸡192只、公鸡42只,192只母鸡依笼号分为12组(3种处理精液×4个保存时间),每组16只母鸡,公鸡不分组。统一采精后用两种不同稀释液稀释、低温(4℃)保存至0、4、8、24 h后观察精子活力,并对母鸡输精,分组收集鸡蛋,对各组受精率、出雏率、健雏率进行比较分析,以原精液低温保存作为对照。结果显示,两种稀释液组的精子低温(4℃)保存4、8、24 h,其精子活力极显著高于原精液组(P0.01),配方Ⅱ组精子的活力高于配方Ⅰ组(P0.05);两种配方稀释液组的精液低温(4℃)保存4 h,输精受精率高于原精液组(P0.05);两种配方稀释液组的精液在低温(4℃)保存8 h,输精受精率极显著高于原精液组(P0.01)。表明这两种精液稀释液更有利于精液保存,经稀释后的精液可以显著提高受精率,可为中国南方鸡场种公鸡精液保存技术的完善提供有力的数据支撑。 相似文献
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本文研究了3种稀释液在0～5℃下保存火鸡精液的效果及稀释液pH值、稀释比例和卵黄浓度对精子存活力的影响。原精及稀释精液Ⅰ、Ⅱ、Ⅲ不保存时,受精率分别为71.7％,64.03％,63.29％和63.77％(P<0.05);在0～5℃下保存48h后,原精完全丧失受精率(0％),而稀释精液Ⅰ、Ⅱ、Ⅲ的受精率分别为52.40％,45.30％和20.33％(P<0.01)。火鸡精液在0～5℃保存过程中,pH值降低,原精比稀释精液降低程度大。在本研究条件下,pH6.5和1:3稀释最适合于火鸡精子的存活,稀释液中添加5％或10％卵黄可提高火鸡精子的存活力。 相似文献
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《畜牧与兽医》2015,(9):45-47
试验旨在探讨不同稀释保存液对常温下羊精子活率及存活时间的影响。选取哺乳动物8种常用精液稀释液配方,检测精液稀释后精子活率变化,分析精子存活时间及生存指数。结果表明:不同稀释液对羊精子活率的影响均有差异,精子活率会随着保存时间的增加而降低;同种稀释液在4℃条件下对精子的保存效果更好,与25℃条件下相比,各项指标均有极显著的延长和提高(P0.01);B组液(无水葡萄糖+柠檬酸钠+新鲜卵黄)精子总存活时间、有效存活时间和生存指数在4℃条件下分别为(108.2±9.6)h,(61.5±7.4)h和(63.5±5.8)h,与其他各组相比差异显著(P0.05),可应用于生产。 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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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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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