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利用GnRH、PGF2α和PRID进行黄牛程序化人工授精 总被引：4，自引：0，他引：4
在一个处于自然散养状态下的本地黄牛群体中 ,比较了发情 /排卵同期化并定时人工授精组和仅同期发情处理后适时人工授精组黄牛的繁殖效果。 5 3头健康无病的本地黄牛随机分为 4组 ,试验 组 (Ov Synch法 ) ,注射 Gn RH-PGF2α- Gn RH;试验 组 ,注射 Gn RH- PGF2α- EB;试验 组 ,放置 PRID- PGF2α- EB;对照组 ,注射 PGF2α- PGF2α。其中 ,试验 、 、 组分别在处理结束后 16～ 2 0、2 4、2 4 h进行定时人工授精 ,对照组在鉴定发情后作适时输精。结果显示 :(1)各试验组同期发情率与对照组差异不显著 (P>0 .0 5 ) ,;(2 )试验 、 、 组所有授精牛均分别集中在处理结束后16～ 2 3、2 4～ 2 8、2 4～ 2 8h内完成人工授精 ,而对照组处理牛接受人工授精时间非常分散 ;(3)试验 、 、 组的第一情期受胎率分别为 6 0 .0 %、5 8.3%和 5 7.1% ,与对照组 (42 .9% )之间无显著差异 (P>0 .0 5 )。结果表明 ,试验组 3种程序处理黄牛均可以达到定时人工授精且不降低受胎率的目的。尤其是 Gn RH- PGF2α- EB程序 ,成本低、处理效果好 ,适宜在生产中推广应用 相似文献
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非繁殖季节诱导滩羊发情与产羔的试验 总被引：1，自引：1，他引：0
在绵羊非繁殖季节,将60只滩羊随机均分为3组,第1、3组分别采用澳大利亚、新西兰产的氟孕酮阴道海绵栓(PR ID),第2组采用浙江产的羊乐套装,分别放入60只母羊的阴道内。第1、3组于第13天去栓,同时每只羊注射PMSG 450 U;第2组于第14天去栓,第14、15天分别注射配伍1号及配伍2号。结果表明:去栓后1~7 d 3组发情率分别为65%、70%和85%。第1个情期受胎率分别为25%、30%和30%;第2个情期受胎率分别为35%、35%和60%。3组的产羔率分别为60%、65%和90%,且第3组多产双、三羔。经分析产地的实际情况、药品的费用及实际操作简便程度,建议使用浙江所产的羊乐套装。 相似文献
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乏情季节诱导山羊同期发情的研究 总被引：12，自引：2，他引：10
通过对云阳县栖霞乡放牧 +舍饲条件下的经产母羊 3组 (A组 40只、B组 3 1只、C组 18只 )共 89只分别用孕激素阴道栓同期发情处理 10天 ,其中A组取栓后直接观察发情情况、B和C组取栓后分别注射PGF2α 0 0 5mg/只和 0 1mg/只。结果表明 :A组 2～ 4天内同期发情率为 42 5 0 % ;B组同期发情率为 67 74% ,48小时有羊只发情高峰 ;C组同期发情率为83 3 3 %。取栓至开始发情时间A组明显长于B组和C组 (P <0 0 5 ) ;平均发情持续时间短于B、C组 (P <0 0 1,P <0 0 5 ) ,B、C组之间差异不显著 (P >0 0 5 )。 相似文献
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Voh AA Larbi A Olorunju SA Agyemang K Abiola BD Williams TO 《Tropical animal health and production》2004,36(5):499-511
A study was undertaken to determine the effectiveness of a progesterone-releasing intravaginal device (PRID) and prostaglandin F2 alpha (PGF2alpha) in synchronizing oestrus in N'dama and Bunaji cows and heifers and the fertility following artificial insemination at the synchronized oestrus. A total of 116 cows and heifers (58 N'dama and 58 Bunaji) were used in two separate trials. In the first trial, oestrus was synchronized using a PRID, which was inserted for 12 days; in the second trial, oestrus was synchronized by giving two injections of PGF2alpha 13 days apart. Only animals that did not respond to the first injection were given the second injection. At the end of each treatment period, the animals were observed for oestrus for 7 days and inseminated approximately 12 h following detection of oestrus. Standing to be mounted was the single criterion used to judge an animal to have been in oestrus. PGF2alpha and PRID were both effective in synchronizing oestrus in N'dama and Bunaji cows and heifers. The respective oestrus response rates, pregnancy rate and conception rates for PRID and PGF2alpha were 85.7%, 53.6% and 62.5% for PRID, and 91.7%, 68.3% and 74.6% for PGF2alpha. N'dama cattle showed significantly (p<0.05) better oestrus response rate, pregnancy rate and conception rate than Bunaji cattle following both PRID and PGF2alpha treatments. The pregnancy rate and conception rate following PGF2alpha treatment were better (p < 0.05) than for PRID, although the oestrus response rate did not differ. It is concluded that both PRID and PGF2alpha are effective in synchronizing oestrus in N'dama and Bunaji cattle in the hot humid zone of Nigeria and the fertility to artificial insemination at the synchronized oestrus was normal and acceptable. Thus, PRID and PGF2alpha can effectively be used in intensive breeding programmes for the rapid multiplication and distribution of both cattle breeds, especially the N'dama, which is a unique and beneficial animal genetic resource for the tsetse infested hot humid zone of Nigeria. 相似文献
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