共查询到19条相似文献，搜索用时 687 毫秒
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生殖激素是调控动物体内复杂生殖过程并影响繁殖性能的一系列的重要激素。近年来，利用生殖激素的批次化生产繁殖技术被广泛使用，提高了母猪的繁殖效率，促进了养猪业向集约化和规模化方向的发展。目前在批次化生产过程中主要采用孕马血清促性腺激素（PMSG）和人绒毛膜促性腺激素（HCG）以及化学类激素进行繁殖调控。但是这些产品的应用仍存在一些问题，因此需要开发出成本低、活性好的高品质蛋白类生殖激素产品，应用于猪场批次化生产中，提高生猪养殖效率和降低生产成本，为提升我国乃至全球畜牧业的动物繁殖效率做出贡献，为动物和人类的健康提供重要保证。 相似文献
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<正>批次化生产管理技术的使用,使得激素在养猪生产中的使用发生了明显的变化。传统连续生产模式下,激素作为解决繁殖问题的药物,是被动治疗手段。批次化生产的实施,是主动利用生殖激素调节母猪的发情周期,改变猪场的生产模式,提高猪群的繁殖性能。 相似文献
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第3期《猪业科学》聚焦母猪批次化管理技术集成与应用,张守全教授等深入探讨了母猪批次化生产管理新技术及批次化管理在我国的创新应用,对后备母猪的情期管理、孕马血清促性腺激素的高效使用等实践类文章也丰富了养猪人的实践技能。《猪业科学》对母猪批次化管理技术集成与应用这一主题进行探讨,帮助猪企走上批次化管理的标准化道路,助力企业提质降本。 相似文献
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编者按：在美丽的海滨城市宁波坐落着这样一家企业，将提高我国规模猪场生产、繁殖效率作为企业发展目标，专注进行经济动物生殖激素的研发与推广，多年精钻，获得新兽药证书、专利证书多项，同时在规模猪场大力推广精准母猪批次化生产管理技术及定时输精技术，助力猪场提高生产效率、提升养殖效益，尤其后非洲猪瘟时代为猪场复产提供强大助力。 相似文献
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从诱情公猪看信息素的作用 总被引：1，自引：1，他引：0
越来越多的养猪场开始重视公猪信息素,在降低使用诱情公猪的生物安全风险和提高育种效率方面的作用。文章将通过回顾一系列的试验数据,包括不同性欲和年龄的公猪诱情效果上的差别,唾液腺手术后的公猪对母猪诱情的影响,以及不同的信息素产品在诱导母猪性行为以及体内激素水平的表达上的区别,来说明唾液类似物是公猪天然信息素的主要载体。不同的公猪的诱情效果差别,主要是源于唾液类似物中信息素的浓度以及分泌量的差别。通过分析雄烯酮对母猪性行为以及体内激素水平的影响,发现公猪分泌的信息素可能是多种分子的混合物,而不是单分子组成,不同性质的信息素将产生不同效应。 相似文献
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A Ogasa T Tsutsui E Kawakami M Sone T Kawarasaki S Iwamura 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》1991,53(2):181-184
Clinical and endocrinological responses to administration of gonadotropin releasing hormone analog (LH-RH-A) during the lactation period and postweaning in the sow were investigated. Plasma LH concentrations in lactating sows rose immediately after administration of LH-RH-A. However, in postweaning sows the increase of LH level was more slowly. Three of 5 postweaning sows came into estrus and ovulated after LH-RH-A treatment. One sow exhibited a distinct LH response, but her ovaries remained quiescent. The remaining one with feeble estrus for a short period became cystic ovaries. Thus, LH response to GnRH in the sow seems to be higher during early lactation than at 2 days postweaning. 相似文献
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Dietary fiber is a critical nutrient in sow diet and has attracted interest of animal nutritionists for many years. In addition to increase sows’ satiety, dietary fiber has been found to involve in the regulation of multiple biological functions in the sow production. The interaction of dietary fiber and gut microbes can produce bioactive metabolites, which are of great significance to sows'' metabolism and reproductive performance. This article reviewed the interaction between dietary fiber and gut microbes in regulating sows'' gut microbial diversity, intestinal immune system, lactation, and production performance, with the aim to provide a new strategy for the use of dietary fiber in sow diets. 相似文献
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非洲猪瘟导致能繁母猪产能断崖式下降，二元母猪价格居高不下，产能严重不足，而频繁引种不利于疫情防控，这给我国养猪业带来了前所未有的挑战。为快速恢复生猪产能，三元商品猪被迫留为种用；然而，三元母猪繁殖性能较差，如果选留、选配等管理措施不当会进一步降低其繁殖性能。文章针对这些问题介绍了非洲猪瘟对我国养猪业的影响，重点分析了杂种母猪的利用原理以及三元母猪的轮回杂交闭群繁育选配策略，期望实现三元母猪的种用价值最大化，提高商品猪养殖的经济效益，促进生猪产业的可持续性发展。 相似文献
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利用益生菌共生配伍和分级复合发酵技术生产的微生态制剂孕育康,富含可调节母猪繁殖激素水平的槲皮酮-3-0吡喃葡萄糖(栎素)、槲皮酮(类黄酮)、肌醇、植物甾醇等抗氧自由基活性物质。在母猪日粮中添加创博誖孕育康,母猪断奶当天和断奶后第4天雌激素(E2)水平为37.93pg/ml和44.90pg/ml,分别提高103.8%和152.7%;孕激素(Prog)在断奶当天和断奶后第4天的水平为0.95ng/ml和0.83ng/ml,分别提高308.5%和320.5%;母猪断奶至配种的间隔时间从10.53天缩短至6.68天,差异极显著(F>0.01);提高情期配种受胎率8.94%,使母猪的非生产天数由95.4天减少至58.1天。 相似文献
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V. G. Papatsiros C. Alexopoulos S. K. Kritas G. Koptopoulos H. J. Nauwynck M. B. Pensaert S. C. Kyriakis 《Zoonoses and public health》2006,53(6):266-272
The purpose of this study was to investigate the safety and efficacy of a commercial European porcine reproductive and respiratory syndrome virus (PRRSV)‐inactivated vaccine after 18‐month use in gilts/sows at a farm with high seroprevalence. In a farrow‐to‐finish farm with 1100 sows, all sows and gilts were systematically vaccinated with the PRRS‐inactivated PROGRESSIS® vaccine for a period of 18 months. Farm's reproductive and litter characteristics were longitudinally recorded for this period and historically compared with those of the year prior to vaccination. Serology, employing immunoperoxidase monolayer assay, had confirmed a high prevalence of PRRS‐specific antibodies in most age groups within the farm prior to vaccination. Seroprevalence during the experiment ranged between 0% and 100% in weaners and growers, but remained at stable high levels (>93%) in finishing pigs and gilts throughout all 2‐year period of serology measurements. No local or systemic vaccine side effects were noted throughout the trial period. Vaccinations had resulted over time in a significant improvement of sow reproductive performance (e.g. reduction of premature farrowings, abortions and increase of farrowing rate) and litter characteristics (e.g. increase of the number of live born and weaned pigs and decrease of stillborn, mummified, weak and splay‐legged piglets). It has also been observed that the higher the degree of immunization of a sow, the better the improvement of her reproductive parameters. Sows after vaccination have shown improved characteristics compared to homoparous sows prior to the application of vaccinations in the farm. 相似文献