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《养殖与饲料．饲料世界》2020,(10)
后备母猪批次生产是规模猪场全面实施工业化管理的基础,定时输精技术在后备母猪中的应用进一步加快规模猪场向批次化生产模式的转变。本文总结了定时输精技术的原理、分类和应用,加快规模养殖场向工业化方向的转变。 相似文献
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<正>母猪定时输精技术是实现母猪批次化生产管理的重要技术手段,能够有效提高母猪的利用效率、生产性能,降低传染性疾病的发生率,并降低人工成本。本文总结了母猪定时输精技术的原理、技术要点、在经产和后备母猪中的应用,同时对定时输精技术的优势和前景进行了展望,以期进一步促进母猪定时输精技术的推广与应用,增加生猪养殖业的经济效益。 相似文献
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为了探讨烯丙孕素及定时输精对丹系母猪繁殖性能的影响,试验以100头丹系后备母猪和200头丹系经产母猪为研究对象,采用定时输精和常规输精为主要配种方式,分析比较了烯丙孕素及定时输精对丹系母猪的配种、受胎和产仔指标的影响。结果显示,烯丙孕素及定时输精技术的使用,对丹系母猪繁殖性能无不良影响,且在后备母猪窝均总仔数上呈现出一定的优势。因此,定时输精技术在一定程度上能提高丹系母猪繁殖性能,增加猪场经济效益,以定时输精和分娩同步化为基础的批次化生产管理具有可推广之意义。 相似文献
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为探讨曲普瑞林对初产母猪定时输精效果的影响,本实验选择健康、体况相近的产后21 d断奶的初产母猪81头,随机分为对照组、生理盐水组、戈那瑞林组和曲普瑞林组。对照组母猪断奶后进行发情鉴定并适时输精,其余3组母猪断奶后24 h注射孕马血清促性腺激素(PMSG),72 h后分别肌肉注射生理盐水2 mL、戈那瑞林100μg、曲普瑞林200μg,间隔24 h、40 h进行定时输精。统计各组母猪发情率、卵泡直径、激素浓度和繁殖性能。结果显示:曲普瑞林组母猪断奶后7 d内发情率(88.46%)最高(P>0.05),卵泡直径在第4天达到最大并高于其他各组(P<0.05);曲普瑞林组的参繁配种率高于对照组(P<0.05),批次妊娠率较对照组有提高趋势(P>0.05),窝产总仔数(11.88头)高于生理盐水组(P<0.05),窝产活仔数为10.13头,与生理盐水组差异不显著,曲普瑞林组的仔猪指数较生理盐水组提高144头(P>0.05)。综上,曲普瑞林应用于定时输精程序可提高初产母猪的繁殖性能及利用率。 相似文献
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试验以78头经产大白母猪为试验材料,采用深部输精技术,以探明深部输精对母猪繁殖性能的影响。试验分三个处理组：第Ⅰ组采用常规输精方法,输精次数3次;第Ⅱ组采用深部输精方法,输精次数3次;第Ⅲ组采用深部输精方法,输精次数为2次。试验结果：常规输精组（第Ⅰ组）和深部输精组（第Ⅱ组）比较,窝均产仔数、窝均产活仔数和窝平均产健仔数分别为11.39头、11.84头、10.52头,和12.40头、11.07头、10.43头,窝均产仔数深度输精高于常规输精,经分析二者达到显著水平（P＜0.05）,而窝均产活仔数和窝均产健仔数差异不显著（P＞0.05）;健仔率比较,常规输精组为91.54%,深部输精组为84.84%,二者差异达到显著水平（P＜0.05）;深度输精三次（第Ⅱ组）和深度输精两次（第Ⅲ组）相比母猪繁殖性状指标间差异均不显著（P＞0.05）。试验结果表明：深部输精可以提高母猪的窝均产仔数,但不能提高窝均产活仔数和健仔数,同时深部输精降低健仔率。 相似文献
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猪场低剂量深部输精技术应用研究 总被引：1，自引：0，他引：1
本文旨在研究低剂量深部输精操作及应用技术。每批受配母猪头数设计为1、5、10、15、20头,探讨每批母猪头数对内管插入阻碍率的影响;输精剂量设计为40、60 mL深部输精和80 mL常规输精,探讨不同输精剂量和输精方式对妊娠率、孕囊数和产仔率的影响;内管插入深度设计为10、12、15、18 cm,探讨不同输精深度对精液回流的影响;每组试验重复3次,每次实验母猪50头。结果表明:猪每批深部输精5~10头,内管插入阻碍率显著低于每批1头、15头和20头(P0.05);40、60 mL深部输精组与80 mL常规输精组母猪妊娠率差异不显著(P0.05);40 mL深部输精组B超检测孕囊数≤3的比例最高(29.87%),显著高于其余各组(P0.05);内管插入深度12 cm时的精液回流率显著低于内管插入10 cm和15 cm组(P0.05)。综上,每批输精5~10头、内管深入12 cm、输精剂量为60 mL更有利于猪深部输精操作和取得较好深部输精效果。 相似文献
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采用深部输精与常规输精研究不同剂量和有效精子数对经产母猪繁殖力的影响 总被引：1，自引：0，他引：1
为探讨不同输精剂量与不同有效精子数对经产母猪繁殖力的影响,使用深部输精和常规输精作为主要配种方式。将发情母猪随机分为2组,A组为深部输精组(n=60),B组为常规输精组(n=60)。对A、B组内母猪分别用不同的输精剂量(Ⅰ:30亿/80 mL、Ⅱ:15亿/80 mL、Ⅲ:15亿/40 mL;n=20)进行输精。结果表明:与常规输精相比,深部输精组的受胎率和分娩率分别为93.33%和88.33%,略高于常规输精组的86.67%和83.33%,但差异不显著(P>0.05);但深部输精可显著提高经产母猪的产仔数和产活仔数,分别提高1.07头和1.15头。无论是深部输精还是常规输精,15亿/80 mL的输精量,均可获得与30亿/80 mL输精量一致的产仔效果,这一结果可以使优秀种公猪的利用率提高1倍,降低了最新国标《GB23238-2009》中对外种猪输精剂量的要求,建议扩大实验并推广使用。 相似文献
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为了减少人工授精过程中人为操作引入的病原微生物,改善母猪断奶后不发情、延迟发情或发情后配种不受孕所导致的母猪繁殖性能降低的现象,在饲养管理良好、免疫程序健全的条件下,试验采用在母猪配种前对其进行药物处理。将试验母猪随机分为2组,A组为断奶经产母猪(n=65),B组为第2情期后的后备母猪(n=58)。将A组进一步分为A-Ⅰ组(n=36,投药组)和A-Ⅱ组(n=29,空白对照组),B组进一步分为B-Ⅰ组(n=34,投药组)和B-Ⅱ组(n=24,空白对照组)。统计发情率、受胎率、分娩率及产仔数等繁殖指标。结果表明:A-Ⅰ组每头母猪断奶10 d内发情率为100%,与A-Ⅱ组发情率(96.55%)相比差异不显著(P>0.05);A-Ⅰ组情期受胎率为91.67%,分娩率为86.11%,产仔数为11.32头,而A-Ⅱ组情期受胎率为85.71%,分娩率为78.57%,产仔数为9.95头,差异均显著(P<0.05);B组内,除健仔数外其余各指标差异均不显著(P>0.05)。说明在配种前给经产母猪投药,可以改善母猪繁殖力。 相似文献
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One single PMSG batch, Pregmagon-Dessau, was compared with other PMSG doses on 2,126 adult sows and 1,700 gilts from five farms. Additional comparisons were made with other Pregmagon or Prolosan batches on 1,178 adult sows and 1,026 gilts. All experiments were made in the context of a programme for ovulation synchronisation and term-oriented insemination. Doses of 700, 800, 900, and 1,000 IU were tested on adult sows and 600, 800, and 1,00 on gilts, with the mean dose of 800IU being found to be sufficient or superior to other doses for fertility results. Doses for adult sows could be adjusted and related to present and previous litter numbers, with the dosage being between 700IU (treatment for third litter) and 700 to 800IU (treatment following average to high previous litter. The preferential dose for gilts was found to be 800IU. Higher PMSG doses (up to 1,000IU) should not be used in synchronisation of ovulation and term-oriented insemination unless extraordinary conditions were safely established. 相似文献
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Toleration-oriented insemination was applied to 1,373 oestrous sows that had undergone bio-engineering treatment, with two insemination portions having been used for each oestrous. Five International Units of oxytocin were added immediately before insemination proper to the semen applied to 315 gilts and 377 old sows. The control group included 296 gilts and 385 old sows inseminated in parallel. Semen intake, on average, was complete between four and eight minutes with the majority of gilts and between four and seven minutes with most of the old sows, but no evidence was obtained as to any action of the oxytoxin upon intake intensity. The treated gilts were superior to the controls by 6.3 per cent in pregnancy rate and by 56 born piglets to each 100 first inseminations. Superiority, consequently, was significant. In both gilts and old sows added oxytocin prolonged insemination by more than five minutes and gave clearly better fertility results. 相似文献
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批次化管理应用最早源自工业批次化管理,应用在畜牧业逐渐转化成母猪等畜禽批次化生产管理。母猪生产批次化管理是利用生物技术,根据母猪群大小进行批次生产,达到同期发情、同时排卵、同时配种和同时分娩的目的,是一种提高猪场母猪群繁殖性能的高效管理体系。近两年来非洲猪瘟给中国生猪养殖行业造成巨大损失。由于母猪批次化生产对猪场生物安全防控、效益提高、降低成本等方面与母猪连续生产模式相比具有很大的优势,所以母猪批次化生产在全国得到迅速推广。 相似文献
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试验旨在建立高效的经产母猪定时输精（timed artificial insemination,TAI）技术,研究了定时输精对经产母猪繁殖性能、断奶-分娩间隔、不同胎次母猪产仔性能及断奶后7 d内血清生殖激素水平的影响。选取309头2~8胎次二元（长×大）经产母猪,随机分为对照组和试验组,对照组母猪进行常规人工授精（artificial insemination,AI）,试验组母猪进行断奶后24 h注射PMSG 1 000 IU,间隔72 h注射GnRH 100 μg,在注射GnRH后24和40 h各输精1次的定时输精技术。通过统计两组母猪的断奶1周内发情率、受胎率、分娩率、窝均产仔数等,判断定时输精对经产母猪繁殖性能的影响;通过对断奶时间和分娩时间的统计,检测定时输精对经产母猪断奶-分娩间隔的影响;用放射免疫（RIA）方法检测2~4胎次母猪断奶1周内血清E2、LH、FSH和P4的含量,研究定时输精对母猪生殖激素的影响。结果显示,试验组母猪发情率显著高于对照组（P<0.05）,但两组间受胎率、分娩率差异不显著（P>0.05）,窝均产仔数、窝均合格仔数和繁殖效率有增加的趋势,但差异不显著（P>0.05）;定时输精显著缩短了母猪的断奶-分娩间隔（P<0.05）。在胎次方面,3~4胎母猪使用定时输精的效果较好,其发情率、受胎率和分娩率均显著高于对照组（P<0.05）。在生殖激素方面,试验组E2水平在注射PMSG后迅速上升,且在定时输精处理后66~96 h内持续高于对照组（P<0.05）,试验组P4水平在断奶后至配种前显著低于对照组（P<0.05）,但配种后快速升高,并高于对照组;LH和FSH的含量在两组间无显著差异。综上,定时输精可有效提高经产母猪的断奶发情率,并减少其非生产天数,可显著提高3~4胎母猪的繁殖性能。 相似文献
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de Smit AJ Bouma A de Kluijver EP Terpstra C Moormann RJ 《The Veterinary quarterly》2000,22(3):150-153
The use of a vaccine against classical swine fever virus (CSFV) during an outbreak of CSF should lead to a reduction in the horizontal or vertical transmission of CSFV. The reduction of vertical, i.e. transplacental, transmission of a moderate-virulent strain of CSFV from the sow to its offspring was studied in sows vaccinated once or twice with a CSFV E2 subunit vaccine. Two groups of nine sows were vaccinated with one PD95 dose of the E2 subunit vaccine, approximately four weeks before insemination. A third group of nine inseminated sows served as controls. One group of nine sows were vaccinated again at two weeks after insemination. At ten weeks after the primary vaccination, approximately six weeks after insemination, all 27 sows were challenged intranasally with 10(5) TCID50 of a moderate-virulent strain of CSFV, the Van Zoelen strain. The sows were euthanized at five weeks after challenge, and samples from the sows and fetuses were collected for detection of CSFV. All 27 sows were in gestation at the time of slaughter, CSFV was detected in the fetuses of all unvaccinated sows but it was not detected in any of the samples collected from fetuses of the double-vaccinated sows. Virus was however recovered from the fetuses of one out of nine sows vaccinated once. All the sows, except four double-vaccinated sows, developed CSFV Erns antibodies. Transplacental transmission of CSFV was reduced significantly (p <0.001) in all vaccinated sows. When the results from the experiment were extrapolated to a herd level, it could be concluded that, with 95% certainty, approximately 11% (single vaccination) or 0% (double vaccination), confidence intervals of 0.01-0.44 and 0.0-0.30 respectively, of the pregnant sows would still not be protected against vertical transmission of moderate-virulent CSFV. We conclude that vaccination with the CSFV E2 subunit vaccine can reduce the transmission of moderate-virulent strain of CSFV from the sow to its offspring significantly. 相似文献