阿尔及利亚北部一家私营奶牛场首次人工授精后受胎率的影响因素
Factors affecting conception rate after the first artificial insemination in a private dairy cattle farm in North Algeria.
作者信息
Souames Samir, Berrama Zahra
机构信息
Laboratory of Animal Health and Production, Higher National Veterinary School, Issad Abbes, Oued Smar Algiers, Algeria.
出版信息
Vet World. 2020 Dec;13(12):2608-2611. doi: 10.14202/vetworld.2020.2608-2611. Epub 2020 Dec 9.
AIM
This study analyzed risk factors influencing the conception rate at the first artificial insemination (CR1) in dairy cows reared in the plain of Mitidja, which is considered a major dairy region in North Algeria.
MATERIALS AND METHODS
A total of 1054 lactations were used in the relational study of fertility conducted using the multivariable logistic regression model using the odds ratio (OR).
RESULTS
The breeding season had a specific effect on fertility; the first service was often followed by pregnancy when performed during autumn (AUT) (OR=1.67, p<0.05) and spring (SPR) (OR=1.65, p<0.05). The chances of obtaining conception during the first service increased significantly for a waiting period (WP) (interval between calving and time to first service) of 50-100 days postpartum (DPP) (OR=1.67, p<0.05).
CONCLUSION
From this study, it can be concluded that no specific effect was observed relative to the breed and parity. Furthermore, CR1 significantly increased after summer calving when the first services were performed during SPR and AUT and a WP after 50 DPP.
目的
本研究分析了影响米蒂贾平原饲养的奶牛首次人工授精受胎率（CR1）的风险因素，米蒂贾平原被认为是阿尔及利亚北部的一个主要奶牛养殖区。
材料与方法
在使用比值比（OR）的多变量逻辑回归模型进行的生育力相关性研究中，共使用了1054次泌乳数据。
结果
繁殖季节对生育力有特定影响；秋季（AUT）（OR = 1.67，p < 0.05）和春季（SPR）（OR = 1.65，p < 0.05）进行首次输精后通常会怀孕。产后50 - 100天（DPP）的等待期（WP）（产犊至首次输精的间隔时间）内，首次输精时受孕的几率显著增加（OR = 1.67，p < 0.05）。
结论
从本研究可以得出结论，未观察到品种和胎次的特定影响。此外，夏季产犊后，若在春季和秋季进行首次输精且产后50天DPP后的等待期WP，则CR1显著提高。
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