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بررسی علل و زیان مالی ناشی از حذف زودهنگام در گله‎های هلشتاین استان اصفهان

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکترای اصلاح نژاد دام، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه صنعتی اصفهان

2 استادیار، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه صنعتی اصفهان

چکیده

هدف این پژوهش، برآورد زیان مالی ناشی از حذف و همچنین بررسی علل حذف در گله‏های هلشتاین استان اصفهان بود. بدین منظور، از اطلاعات چهار گاوداری صنعتی، متشکل از 109865 رکورد زایش در سال‏های 1385 تا 1395 استفاده شد. برای واکاوی آماری از نرم‌افزار SAS و برای برآورد زیان ناشی از حذف، از یک معادلۀ زیست اقتصادی استفاده شد. نرخ حذف در دهۀ گذشته، به‌طور میانگین سالانه 2/1 درصد افزایش‌یافته است (1/13 درصد سال 1385؛ 5/28 درصد سال 1395). میانگین حذف در چهار گله 2/23 درصد و سهم حذف اختیاری تنها 8/5 درصد بود. بیشترین دلیل حذف اجباری، بیماری‌های عفونی (4/31 درصد) و مشکلات تولیدمثلی (8/28 درصد) بودند و بیشتر حذف اجباری در فصل تابستان رخ دادند. در سال 1395 به‌طور میانگین هر مورد حذف زودهنگام به ازای یک دورۀ شیردهی 17800 هزار ریال زیان به دامدار تحمیل می‌کند. زیان وارده به دلیل حذف در گاوهایی که در نوبت زایش اول بودند، 54 درصد نسبت به گاوهای با نوبت زایش دو و بالاتر بیشتر برآورد شد. زیان ناشی از هر مورد حذف در ماه اول شیردهی به‌طور میانگین 20460 هزار ریال برآورد شد که نسبت به ماه دهم شیردهی 35 درصد بیشتر بود. نتایج این تحقیق می‏تواند در تجزیه‌وتحلیل هزینه-فایده‌های مربوط به راهکارهای مدیریتی حذف و جایگزینی تلیسه استفاده شود.

کلیدواژه‌ها


عنوان مقاله [English]

An investigation of the causes and the financial losses due to early removal in Holstein farms of Isfahan province

نویسندگان [English]

  • Abolfazl Mahnani 1
  • Ali Sadeghsefidmazgi 2
1 Ph.D. Candidate of Animal Breeding, Department of Animal Science, Faculty of Agriculture, Isfahan University of Technology, Isfahan, Iran
2 Assistant Professor, Department of Animal Science, Faculty of Agriculture, Isfahan University of Technology, Isfahan, Iran
چکیده [English]

The objective of this study was to estimate the financial losses due to culling and replacement as well as the causes of culling in industrial dairy herds of Isfahan province. Data collected from 4 Isfahan dairy farms including 109896 calving records during the years 2006 to 2017. A bio-economic model was used for financial losses estimation and SAS software for statistical analyses. The rate of culling over the past decade has increased by an average of 1.2% per year (13.1% in 2006; 28.5% in 2016). The average of culling rate in 4 herds was 23.2%. The voluntary culling was only 5.8%. The most significant reasons of involuntary culling were infectious disease (31.4%) and reproduction problems (28.8) that mainly happen in summer. On average, each case of culling led to 17800 thousand Rials losses to dairy cow’s producers. The losses due to the culling of the primiparous were 54% higher than that of cows with multiparous. The losses due to culling in the first month of milking were estimated at an average of 20460 thousands Rials which caused 35% more losses per cow than those milking in the tenth month. The results of this research could be used in cost-benefit analysis of management strategies for cull and replacement of heifers.

کلیدواژه‌ها [English]

  • Culling cost
  • Dairy cow
  • voluntary and involuntary cull
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