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埃塞俄比亚中北部高地杂交奶牛的重复配种及其相关风险因素

Repeat Breeding and Its' Associated Risk Factors in Crossbred Dairy Cattle in Northern Central Highlands of Ethiopia.

作者信息

Eshete Tewodros, Demisse Tilaye, Yilma Tefera, Tamir Berhan

机构信息

Department of Animal Science, College of Agriculture and Natural Resource Science, Debre Berhan University, Debre Berhan, Amhara, Ethiopia.

Department of Veterinary Obstetrics and Gynecology, College of Veterinary Medicine and Agriculture, Addis Ababa University, P.O. Box 34, Hora Road, Bishoftu, Oromia, Ethiopia.

出版信息

Vet Med Int. 2023 Jan 21;2023:1176924. doi: 10.1155/2023/1176924. eCollection 2023.

Abstract

The purpose of the current study was to ascertain the prevalence and incidence of repeat breeding and related risk variables in crossbred dairy cattle in the northern Central Highlands of Ethiopia. The prevalence and incidence of repeat breeding in crossbred dairy cattle were 38.4% and 36.6%, respectively, out of the total cows and heifers taken into account for this study and handled with various production strategies. Age, parity, body condition, breeding practices, milk yield, management condition, and insemination time were all substantially ( < 0.05) associated with the prevalence and incidence of repeat breeders. Repeat breeder is more common in elderly, underweight, multiparous, high-milk producing, and AI serviced cows, as well as cows kept in poor management condition. It was deduced that the production system had a significant impact ( < 0.05) on the prevalence of repeat breeders in the research area. In addition, herd size was significantly associated ( < 0.05) with the prevalence of repeat breeder in this study. Insemination time and heat detection practices were also substantially ( < 0.05) interrelated with the prevalence and incidence of repeat breeders, indicating that incorrect heat detection and/or insemination timing had an impact on these variables. Therefore, it is suggested to increase the mindfulness of farm owners, managers, and attendants about appropriate feed and feeding management, accurate heat detection, and insemination time. To reduce the incidence of repeat breeders and the associated reproductive issues, as well as the resulting financial losses on dairy farms, health, housing, and reproductive management should also be improved.

摘要

本研究的目的是确定埃塞俄比亚中北部高地杂交奶牛重复配种的患病率、发病率及相关风险变量。在本研究中考虑到的并采用各种生产策略处理的所有奶牛和小母牛中,杂交奶牛重复配种的患病率和发病率分别为38.4%和36.6%。年龄、胎次、体况、配种方式、产奶量、管理条件和授精时间均与重复配种母牛的患病率和发病率显著相关(P<0.05)。重复配种在老龄、体重过轻、经产、高产奶量以及接受人工授精的奶牛中更为常见,并且在管理条件差的奶牛中也是如此。据推断,生产系统对研究区域内重复配种母牛的患病率有显著影响(P<0.05)。此外,在本研究中,畜群规模与重复配种母牛的患病率显著相关(P<0.05)。授精时间和发情检测方式也与重复配种母牛的患病率和发病率密切相关(P<0.05),这表明不正确的发情检测和/或授精时间对这些变量有影响。因此,建议提高农场主、管理人员和饲养员对适当饲料和饲养管理、准确发情检测以及授精时间的重视。为了降低重复配种母牛的发病率以及相关的繁殖问题,以及由此给奶牛场带来的经济损失,还应改善健康、住房和繁殖管理。

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Reproductive performance of repeat breeders in dairy herds.奶牛群中屡配不孕牛的繁殖性能。
Theriogenology. 2010 Jun;73(9):1220-9. doi: 10.1016/j.theriogenology.2010.01.016. Epub 2010 Mar 11.

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