Department of Animal Reproduction with Clinic, University of Warmia and Mazury, ul. Oczapowskiego 14, 10-719 Olsztyn, Poland.
Pol J Vet Sci. 2021 Sep;24(3):433-437. doi: 10.24425/pjvs.2021.138735.
The study was carried out in 5 dairy herds of Polish Holstein-Friesian cows. The average milk yield was about 9000 kg per year. For each herd, the following fertility parameters were calculated at the start of the program and 4 years later: first- service conception rate, services per conception, length of inter-calving period and culling rate due to infertility. The incidence of silent heat, ovarian cysts, ovarian afunction, retained placenta and clinical endometritis was also recorded. Four years after implementation of the program, the average first-service conception rate increased from 43.2% to 51.2%. In three herds the differences were statistically significant (p⟨0.05). There was also a decrease in the number of services per pregnancy and in the culling rate due to infertility. Fertility performance was maintained in two herds. The average incidence of silent heat decreased from 38.1% to 29.7% and the difference was statistically significant (p⟨0.05) in three herds. There was no significant reduction in incidence of other reproductive disorders during the 4 years except for clinical endometritis in one herd. The average milk yield increased from 9300 kg to 9530 kg milk per cow per year. In conclusion, the results indicate that the implementation of the integrated veterinary herd health program improved or maintained fertility performance despite an increase in milk yield.
本研究在 5 个波兰荷斯坦奶牛场进行。平均产奶量约为每年 9000 公斤。对于每个牛群，在项目开始时和 4 年后计算以下生育参数：首次配种受孕率、配种次数、产犊间隔和因不育而淘汰率。还记录了隐性发情、卵巢囊肿、卵巢功能不全、胎衣不下和临床子宫内膜炎的发病率。方案实施 4 年后，首次配种受孕率从 43.2%提高到 51.2%。在三个牛群中，差异具有统计学意义（p⟨0.05）。配种次数和因不育而淘汰率也有所下降。两个牛群的生育能力保持不变。隐性发情的平均发病率从 38.1%降至 29.7%，在三个牛群中差异具有统计学意义（p⟨0.05）。除了一个牛群的临床子宫内膜炎外，在 4 年内其他生殖障碍的发病率没有显著降低。平均产奶量从每头牛每年 9300 公斤增加到 9530 公斤。总之，结果表明，尽管产奶量增加，但实施综合兽医牛群健康方案改善或维持了生育能力。
