برآورد زیان‌های مالی ناشی از وقوع سقط جنین در گله‌های گاو شیری با استفاده ‏از مدل بودجه‌بندی جزیی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش‌آموخته دکتری ژنتیک و اصلاح دام، دانشکده کشاورزی، دانشگاه صنعتی اصفهان

2 دانشیار ژنتیک و اصلاح دام، دانشکده کشاورزی، دانشگاه صنعتی اصفهان

چکیده

سقط جنین در گاو شیری را می‌توان به دو نوع سقط سبک (سقط بین روزهای 60 تا 260 آبستنی بدون تغییر در نوبت زایش) و سنگین (از دست دادن جنین بعد از روز 200 آبستنی با شروع یک دوره شیردهی جدید)، تعریف نمود. بر اساس این تعریف، زیان­های مالی سقط ممکن است با توجه به نوع سقط در سطح گله متفاوت باشد. برای این منظور، از روش بودجه بندی جزیی، در 6 گله گاو شیری هلشتاین، واقع در استان اصفهان و چهار محال و بختیاری در سال 1399 استفاده شد. در این مدلسازی، زیان مالی ناشی از کاهش در عملکرد تولیدی و تولیدمثلی، زیان­های جایگزینی و از دست رفتن گوساله در نظر گرفته شد. به طور متوسط زیان­های مالی از دست دادن آبستنی 4/27673 هزار ریال به ازای هر مورد، برآورد شد. اگرچه احتمال وقوع سقط سنگین در گله­های مورد مطالعه خیلی کمتر از سقط سبک بود (3/2 در مقابل 5/12 درصد)، اما خسارت قابل توجهی را به دامدار تحمیل می­کند (به­طور میانگین 4/32 در مقابل 0/22 میلیون ریال به ازای هر مورد وقوع سقط). بیشترین زیان ناشی از سقط به دلیل کاهش در باروری (3/63 درصد) بود و کاهش در تولید شیر (8/22 درصد) در رتبه بعدی قرار داشت. نتایج این پژوهش می‌تواند در تصمیم‌گیری بهینه مبنی بر حذف و یا نگهداری گاو سقط کرده در گله های گاو شیری مورد استفاده قرار گیرد.

کلیدواژه‌ها


عنوان مقاله [English]

Estimation of financial losses associated with abortion in‏ ‏dairy herds using partial ‎budgeting model ‎

نویسندگان [English]

  • Hamideh Keshavarzi 1
  • Ali Sadeghi-Sefidmazgi 2
1 Ph.D. Graduate in Animal Breeding & Genetics,, Department of Animal Sciences, Faculty of Agriculture, ‎Isfahan University of Technology, Isfahan, Iran‎
2 Associate Professor in Animal Breeding & Genetics,, Department of Animal Sciences, Faculty of Agriculture, Isfahan University of ‎Technology, Isfahan, Iran‎
چکیده [English]

Abortion in dairy cow can be categorized into two types of abortion: Rebreeding (RA, abortion incidence between 60 and 260 d of gestation, without change in lactation number), and new lactation abortion (NLA, abortion incidence after 200 d in gestation which leads to a new lactation). According to this definition, the losses of abortion might be different based on the type of abortion at the herd level. For this purpose, a partial budgeting model was developed to estimate the losses of abortion in 6 Holstein dairy herds located in Isfahan and Chaharmahal-Bakhtiari provinces during 2020. Financial losses due to reduction in productive and reproductive performances, replacement costs and calf loss were considered in this modeling. On average, loss of pregnancy was estimated 27.7 million IRR per case. Although the probability of NLA incidence was much lower than RA abortion (2.3% vs 12.5%), but NLA imposes significant financial losses to farmers (on average 32.4 million IRR vs. 22.0 million IRR per case). In general, decline in fertility was the most crucial factor of losses (63.3%) due to abortion, and decrease in milk yield (22.8%) placed in the second rank. The results obtained in this study can be used by farmers who make the optimal decision to keep or cull the aborted cows in the dairy farms.

کلیدواژه‌ها [English]

  • Dairy cattle
  • losses due to abortion
  • modeling
  • new lactation abortion
  • rebreeding abortion
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