China Animal Husbandry & Veterinary Medicine ›› 2026, Vol. 53 ›› Issue (2): 892-902.doi: 10.16431/j.cnki.1671-7236.2026.02.034

• Genetics and Breeding • Previous Articles     Next Articles

Study on the Influencing Factors of Estrus Synchronization Effect in Guanling Cattle

SUN Xinming(), CHEN Zuhong, FU Shixiong, YE Fang   

  1. Anshun Vocational and Technical College,Anshun 561000,China
  • Received:2025-06-26 Online:2026-02-20 Published:2026-01-27
  • Contact: SUN Xinming E-mail:18083322086@163.com

Abstract:

Objective In order to provide a basis for further optimizing the estrus synchronization strategy of Guanling cattle and improving the reproductive efficiency of large-scale cattle farms,this experiment was designed to investigate the effects of treatment methods, treatment months, fat conditions and reproductive status on the estrus synchronization of Guanling cattle. Method 150 healthy female Guanling cattle over 2 years old were selected and randomly divided into 5 groups, 30 cattle in each group. The following experiments were carried out, and artificial insemination was carried out after estrus identification. Experiment 1: 30 multiparous Guanling cattle with moderate to upper fatness were selected and treated with CIDR+ PGF (group 1) and twice PGF injection (group 2) in July to compare the effect of two treatment methods on estrus synchronization. The following experiments were carried out by twice PGF injection. Experiment 2: 30 multiparous Guanling cattle with moderate to upper fatness were treated in March (group 3). Experiment 3: 30 multiparous Guanling cattle with lean fatness were treated in July (group 4). Experiment 4: In July, 30 reserve Guanling cattle with moderate to upper fatness were treated (group 5). The estrus synchronization rates and non-return rates obtained from groups 3-5 were compared with the data of group 2 to explore the effect of Guanling cattle in different treatment months, fat conditions and reproductive status on estrus synchronization effects. Result There were no significant difference in estrus rate (93.33% and 90.00%) and non-return rate (89.29% and 88.89%) of Guanling cattle between groups 1 and 2 (P>0.05). The estrus rate (66.67% and 36.67%) and non-return rate (75.00% and 54.55%) of Guanling cattle in groups 3 and 4 were significantly or extremely significantly lower than that in group 2 (P<0.05 or P<0.01). There were no significant difference in estrus rate (83.33%) and non-return rate (88.00%) of Guanling cattle between groups 5 and 2 (P>0.05). Conclusion The estrus synchronization treatment method and reproductive status had no significant effect on the estrus synchronization effect of Guanling cattle. The treatment month and fat condition could affect the estrus synchronization effect of Guanling cattle. It was appropriate to select the healthy cows with moderate to upper fatness, and the estrus synchronization treatment should be carried out in the warm season with abundant forage to obtain a relatively better synchronization effect.

Key words: Guanling cattle; synchronization estrus; treatment month; fat condition; reproductive status

CLC Number: