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بررسی زیان اقتصادی ناشی از تأخیر در آبستنی گاوهای شیری

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری گروه علوم دامی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج

2 استادیار گروه علوم دامی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج

3 استادیار گروه علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی دانشگاه ساری

چکیده

هدف از مطالعۀ حاضر، بررسی آثار اقتصادی تأخیر آبستنی گاوهای شیری در گاوداری‌های بزرگ صنعتی ایران است. روزهای باز بهینه و حداکثر تولید به ترتیب 110 روز و 45 کیلوگرم در نظر گرفته شد. قیمت شیر، هزینۀ اقلام خوراکی، اسپرم و هورمون‌ها بر اساس متوسط قیمت پاییز 1393 شناسایی شد. با افزایش روزهای باز از 110 به 170 روز هزینۀ اسپرم مصرفی و هورمون لازم برای آبستن‌کردن دام 2 برابر شد. نتایج این پژوهش نشان داد برای گاوی با حداکثر تولید 45 کیلوگرم، هرروز تأخیر در آبستنی در اولین، دومین، سومین و چهارمین‌ماه پس از روز 110، به ترتیب 254005، 511612، 725957 و 1013331 ریال زیان اقتصادی ایجاد خواهد کرد. 2/55 تا 8/57 درصد این زیان ناشی از هزینه‌های خوراک است؛ هر 1 درصد تغییر در قیمت خوراک، این زیان را به‌طور مستقیم 56/0درصد تغییر خواهد داد.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluating Economic Losses Associated With Delayed Conception in Dairy Cows

نویسندگان [English]

  • Ali Rezaee Roodbari 1
  • Hamid Kohram 2
  • Essa Dirandeh 3
1 Ph. D. Student, Department of Animal Science, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
2 Assistant Professor, Department of Animal Science, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
3 Assistant Professor, Department of Animal Science, Sari Agricultural & Natural Resources University
چکیده [English]

The objective of this study was to consider economic consequence of delayed conception of milking cows in large dairy farms in Iran. Optimum open days and milk production at peak were assumed to be 110 days and 45 kg respectively. Price of milk, feed, semen and hormones were calculated based on average prices of autumn, 2013. Results of this study showed that increasing days in milk (DIM) from 110 to 170 has doubled costs of sperm and veterinary hormones. Delaying of each day of conception in cows with 45 kg of milk production at peak, during first; second, third and fourth estrous cycle beyond the optimum days open (110 d) cause economic losses of 308503, 572818, 812689 and 1013331 Rials, respectively. Feed costs compromise 54.7 to 56.6 percent of the loss, and any one percent change in feed price will directly cause 0.55 percent changes of the loss.

کلیدواژه‌ها [English]

  • economic evaluation
  • open days
  • feed costs
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