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Modeling the Effect of Lameness on Culling of Dairy Cows in Tehran Province

محل انتشار: دوفصلنامه جراحی دامپزشکی، دوره: 4، شماره: 1
سال انتشار: 1388
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 128

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لینک ثابت به این مقاله:
https://civilica.com/doc/1989777

شناسه ملی سند علمی:

JR_IJVS-4-1_004

تاریخ نمایه سازی: 8 خرداد 1403

چکیده مقاله:

Objective-To assess the effect of lameness on culling of dairy cows in Tehran province.Design- Historical cohort study.Study population and procedures- ۷۰۶۷ first- and second-parity Holstein dairy cows that calved from March, ۲۱ ۲۰۰۷ to March, ۲۰ ۲۰۰۸ were until next calving or culling. Logistic regression was conducted data.Results-The overall lactational culling rate for eligible cows in the study was ۲۲.۰۹% (۹۵% CI: ۱۹.۲۶-۲۴.۹%). Lameness was an important factor in the model and increased odds of culling (OR= ۱.۳۲; ۹۵% Confidence interval = ۱.۱۵-۱.۵۱). Moreover, parity, ۶۰-day cumulative milk yield, and herd size increased culling odds. We did not find evidence for a significant effect of calving season on culling.Conclusion- Lameness is an important factor in culling decision in dairy herds in this area.

کلیدواژه ها:

Culling ، dairy cow ، logistic regression ، Tehran Province

نویسندگان

Alireza Bahonar

Department of Food Hygiene and Quality Control, Faculty of veterinary medicine, University of Tehran, Tehran, Iran.

Hamid Sharifi

Department of Food Hygiene and Public Health, Faculty of Veterinary Medicine, Shahid Bahonar University of Kerman, Kerman, Iran and Research Center for Modeling in Health, Kerman University of Medical Sciences, Kerman, Iran.

Saied Bokaie

Department of Food Hygiene and Quality Control, Faculty of veterinary medicine, University of Tehran, Tehran, Iran.

Mehdi Vodjgani

Department of Clinical Science, Faculty of veterinary medicine, University of Tehran, Tehran, Iran.

Abbas Rahimi Foroushani

Department of Epidemiology & Biostatistics, School of Hygiene, Tehran University of Medical Sciences, Tehran, Iran.

Ali Akbar Haghdoost

Research Center for Modeling in Health, Kerman University of Medical Sciences, Kerman, Iran.