ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2019, Vol. 50 ›› Issue (7): 1405-1411.doi: 10.11843/j.issn.0366-6964.2019.07.009

• ANIMAL BIOTECHNOLOGY AND REPRODUCTION • Previous Articles     Next Articles

Analysis on the Influencing Factors on Activity of Returning Estrous Cows

LIU Jiangjing1,2, CHEN Xiaoli2, TIAN Hongzhi1,2, LU Yongqiang3*, 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;
    3. Animal Husbandry Station of Beijing, Beijing 100107, China
  • Received:2018-11-14 Online:2019-07-23 Published:2019-07-23

Abstract: In order to improve the detection rate of returning estrous cows via pedometer, the effects of season, parity and time of returning estrus on activity of breeding cows were investigated. The returning estrus situation and activity change of 214 multiparous cows after artificial insemination were monitored by using pedometer, and the returning estrous cows were confirmed by rectal examination. Afterwards, the activity before and during returning estrus of returning estrous cows were statistically analyzed. Statistical analysis result showed that the proportion of returning estrous cows in the first, second, third and fourth estrous cycle after artificial insemination was 48.7%, 29.9%, 16.2%, 5.1%, respectively. The activity before and during returning estrus showed a downtrend with the increase of parity and time of returning estrus as a whole. Simultaneously, the duration of returning estrus also gradually decreased with the prolongation of pregnancy, and the activity of cows during returning estrus was significantly decreased in summer (P<0.05). Cow's reproduction should be paid more attention during the first and second estrous cycle after artificial insemination. In addition to parity, seasons and time of returning estrus must be considered comprehensively, the duration of returning estrus should also be paid special attention when the threshold is set, so that the automatic monitoring of returning estrous cows can be carried out scientifically by using activity parameter.

CLC Number: