畜牧兽医学报2017，Vol.48Issue(7)：1221-1228,8.DOI:10.11843/j.issn.0366-6964.2017.07.006
牛发情期活动量与阴道黏液电阻值变化规律的研究
Study on the Regulations of Activity and Vaginal Electrical Resistance of Cattle during the Estrous Cycle
摘要
Abstract
It is important to determine the insemination time by using accurate estrous detection and ovulation prediction.In this study,10 multiparous Simmental cattle and 10 primiparous Holstein cows,which were 60 to 90 days postpartum,healthy and nonpregnant,were used as experiment animals.After estrus synchronization,the oestrus and ovulation time of cattle were detected by observation and rectal examination,and the corresponding activity and vaginal electrical resistance (VER) were measured by using pedometers in an interval of 30 min and estrus ovulation tester in an interval of 4 h,respectively.Results showed that,the VER in dioestrus ((300± 12) Ω) was significantly higher than that in oestrus (P＜0.05),and decreased rapidly 4 h before the onset of oestrus and dropped to the lowest ((220±27) Ω) 8-12 h after the onset of oestrus,and then gradually recovered to the dioestrus level after ovulating.The activity in dioestrus was lower than that in oestrus,and increased 10 times rapidly after the onset of oestrus,and then recovered to the dioestrus level after the end of oestrus.The oestrus duration,the time from onset of oestrus to ovulation and the time from end of oestrus to ovulation were (15.6±2.8) h,(26.8±4.2) h and (11.3±4.3) h,respectively.The ovulation occurred (15.0±1.3) h later after the lowest VER.The activity and VER variation could provide guidance to explore the techniques of accurate oestrus detection and insemination during oestrus and ovulation.The actvity combined with VER would improve oestrus detection efficiency and timing of ovulation predicted accuracy,which have significant value for developing the automatic technology of oestrus detection and ovulation prediction.关键词
牛/发情鉴定/排卵/活动量/阴道黏液电阻值Key words
cattle/oestrus detection/ovulation/activity/vaginal electrical resistance分类
农业科技引用本文复制引用
寇红祥,李蓝祁,王振玲,任康,李树静,路永强,王栋..牛发情期活动量与阴道黏液电阻值变化规律的研究[J].畜牧兽医学报,2017,48(7):1221-1228,8.基金项目
奶牛产业技术体系北京市创新团队项目(bjcystx-ny-3) （bjcystx-ny-3）
国家自然科学基金(31372296) （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) （161500332A）
