牛发情期活动量与阴道黏液电阻值变化规律的研究

发布时间：2018-05-12 01:39

本文选题：牛 + 发情鉴定　；参考：《畜牧兽医学报》2017年07期

【摘要】：准确的发情鉴定与排卵时间预测对确定输精时间具有重要意义。本研究随机选择产后60~90d健康二胎西门塔尔牛与头胎荷斯坦奶牛各10头为试验牛,试验牛同期发情后,采用外部观察与直肠检查确定发情、排卵时间,并使用计步器每30min自动检测牛发情前后及排卵前后的活动量,同时,使用发情排卵仪每4h测定阴道黏液电阻值(简称电阻值)变化。结果表明,间情期电阻值(300±12)Ω显著高于发情期(P0.05),发情开始前4h,电阻值迅速下降,到发情开始后8~12h,下降至最低(220±27)Ω,随后逐渐回升,到排卵结束,恢复至间情期水平;间情期牛活动量较低,发情后活动量激增,平均增加(10.8±7.0)倍,发情结束后恢复正常。发情持续时间、开始发情~排卵时间与发情结束~排卵时间分别为(15.6±2.8)、(26.8±4.2)与(11.3±4.3)h;电阻最低值~排卵时间为(15.0±1.3)h。发情排卵时,活动量与阴道黏液电阻值变化规律的揭示,对准确发情鉴定与输精具有重要指导意义,二参数结合使用大大提高了发情鉴定效率及排卵时间预测准确性,具有重要的自动化发情监测及排卵预测技术研发价值。
[Abstract]:Accurate estrus identification and ovulation time prediction are important for determining insemination time. In this study, 10 healthy Simmental cows and 10 Holstein cows were randomly selected as experimental cows. After simultaneous estrus test, external observation and rectal examination were used to determine estrus and ovulation time. The activity of bovine before and after estrus and before and after ovulation was detected automatically by using a pedometer per 30min. At the same time, the vagina mucus resistance (RV) was measured by estrus ovulator every 4 h. The results showed that the resistance value (300 卤12) 惟 in the estrus period was significantly higher than that in the estrus period (P 0.05). The resistance value decreased rapidly 4 h before the estrus began, and reached the lowest level of 220 卤27 惟 at 812 h after the estrus began, and then gradually increased to the end of ovulation and recovered to the level of the interoestrous period. During the period of interoestrus, the amount of activity of cattle was low, the amount of activity after estrus increased by 10.8 卤7.0) times, and returned to normal after the estrus was over. The duration of estrus, the beginning of estrus to ovulation and the ending of estrus to ovulatory time were 15.6 卤2.8 ~ 26.8 卤4.2) and 11.3 卤4.3 h, respectively, and the lowest resistance to ovulatory time was 15.0 卤1.3 h. During ovulatory ovulation, the changes of activity and vaginal mucus resistance are of great significance for accurate estrus identification and insemination. The combination of two parameters can greatly improve the efficiency of estrus identification and the prediction accuracy of ovulation time. It has important research and development value of automatic estrus monitoring and ovulation prediction technology.
【作者单位】：吉林农业大学动物科学技术学院;中国农业科学院北京畜牧兽医研究所农业部畜禽遗传资源与利用重点开放实验室;湖南农业大学动物医学院;北京农业职业学院;北京市畜牧总站;石家庄天泉良种奶牛有限公司;
【基金】：奶牛产业技术体系北京市创新团队项目(bjcystx-ny-3) 国家自然科学基金(31372296) 中国农业科学院科技创新工程“家畜胚胎工程与繁殖创新团队”项目(ASTIP;cxgc-ias-06) 石家庄市科学技术研究与发展计划项目(161500332A)
【分类号】：S823

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