Acta Veterinaria et Zootechnica Sinica ›› 2020, Vol. 51 ›› Issue (7): 1619-1627.doi: 10.11843/j.issn.0366-6964.2020.07.014

• ANIMAL BIOTECHNOLOGY AND REPRODUCTION • Previous Articles     Next Articles

Study on the Body Temperature and Physical Activity Alteration of Cow Treated with Ovulation Synchronization and Effect Analysis

TIAN Hongzhi1,2, CHEN Xiaoli2, LI Xin2, LI Ruyi1,2, WANG Dong2*   

  1. 1. College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China;
    2. Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2020-01-20 Online:2020-07-25 Published:2020-07-22

Abstract: In order to guide the optimization of ovulation synchronization, the body temperature and physical activity of cows treated with ovulation synchronization and effect of different ovulation synchronization techniques were investigated. Eighteen Holstein cows (20-month-old) treated with ovulation synchronization (GnRH-PG-GnRH) and 17 Holstein cows (40-60 days postpartum) treated with ovulation pre-synchronization (PG-PG-GnRH-PG-GnRH) were selected, and their body temperature, physical activity and the estrus were monitored by automatic detection system. The results showed that the average vaginal temperature of cows treated with ovulation synchronization increased by (0.43±0.2)℃ and lasted for about (12.37±2.73) h, the average amount of physical activity increased (18.28±18.61) times and lasted for (11.00±1.68) h during estrus; the vaginal temperature decreased by (0.20±0.10)℃, and lasted for about (11.00±1.68) h during ovulation. Automatic estrus identification showed that, 7 cows treated with ovulation synchronization were in estrus and ovulation; all cows treated with ovulation pre-synchronization were in estrus and ovulation before GnRH treatment. Both ovulation synchronization techniques could change the course of cow sexual cycle and promote the synchronization of cow sexual cycle, but it was difficult to completely synchronize the sexual cycle of cows. Therefore, the scientific combination of ovulation synchronization-timed artificial insemination and estrus diagnosis technology can achieve better reproduction effects.

Key words: ovulation synchronization, body temperature, activity, dairy cow, estrus diagnosis

CLC Number: