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

نوع مقاله: مقاله پژوهشی


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

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


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.


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
  1. Ansari-Lari, M., Mohebbi-Fani, M. & Rowshan-Ghasrodashti, A. (2012). Causes of culling in dairy cows and its relation to age at culling and interval from calving in Shiraz, Southern Iran. Veterinary Research Forum, 3(4), 233-237.
  2. Azizzadeh, M. (2014). Characterization and pattern of culling in Hoestein-Friesian dairy herds in Khorasan Razavi Province, Northeast of Iran. Veterinary Research Forum, 2(4), 254-258.
  3. Bahrampour, J., Danesh Mesgaran, M., Arabpour, A. R., Vakili, A. R. & Khezri A. (2016). Risk factors affecting the culling of Iranian Holstein dairy cows. Journal of Livestock Science and Technologies, 4 (2), 15-23.
  4. Bascom, S. S. & Young, A. J. (1998). A summary of the reasons why farmers cull cows. Journal of Dairy Science, 81, 2299-2305.
  5. Blood, D. C. & Rodotitis, S. O. M. (2000). Veterinary medicine. (9 th ed.). Baiilier Tindall, 457-492.
  6. Booth, C., Warnick, L. & Gröhn, Y. (2004). Effect of lameness on culling in dairy cows. Journal of dairy science, 87, 4115-4122.
  7. Dairy Records Management Systems (DRMS). (2013). Dairy Metrics. Available at http://www.drms.org. Accessed April 10, 2013.
  8. De Vries, A. (2006). Ranking dairy cows for future profitability and culling decisions. In: Proceedings of the 3rd Florida and Georgia Dairy Road Show, Pages 91-109, University of Florida, Gainesville.
  9. De Vries, A., Olson, J. D. & Pinedo, P. J. (2010). Reproductive risk factors for culling and productive life in large dairy herds in the eastern United States between 2001 and 2006. Journal of Dairy Science, 93, 613-623.
  10. De Vries. (2013). Cow longevity economics: The cost benefit of keeping the cow in the herd. Cow Longevity Conference. 28-29 Aug, Hamra farm /Tumba, Sweden.
  11. Dorshorst, N. C., Collins, M. T. & Lombard, J. E. (2006). Decision analysis model for paratuberculosis control in commercial dairy herds. Prevent Veterinary Medicine, 75, 92-122.
  12. Fetrow, J., Nordlund, K. & Norman, H. (2006). Invited review: Culling: nomenclature, definitions, and recommendations. Journal of Dairy Science, 89, 1896-1905.
  13. González-Recio, O., Pérez-Cabal, M. & Alenda, R. (2004). Economic value of female fertility and its relationship with profit in Spanish dairy cattle. Journal of Dairy Science, 87, 3053-3061.
  14. Groenendaal, H., Galligan, D. T. & Mulder, H. A. (2004). An economic spreadsheet model to determine optimal breeding and replacement decisions for dairy cattle. Journal of Dairy Science, 87, 2146-2157.
  15. Hadley, G. L., Wolf, C. A. & Harsh, S. B. (2006). Dairy cattle culling patterns, explanations, and implications. Journal of Dairy Science, 89, 2286-2296.
  16. Hare, E., Norman, H. D. & Wright J. R. (2006). Survival Rates and productive herd life of dairy cattle in the United States. Journal of Dairy Science, 89, 3713-3720.
  17. Kalantari, A. S., Mehrabani-Yeganeh, H., Moradi, M., Sanders, A. H. & De Vries, A. (2010). Determining the optimum replacement policy for Holstein dairy herds in Iran. Journal of Dairy Science, 93, 2262-2270.
  18. Liam Polsky M. & Von Keyserlingk, A. G. (2017). Invited review: Effects of heat stress on dairy cattle welfare. Journal of Dairy Science, 100 (11), 8645-8657.
  19. Rajala-Schultz, P. J. & GroÈhn, Y. T. (1999). Culling of dairy cows. Part II. Effects of diseases and reproductive performance on culling in Finnish Ayrshire cows. Preventive Veterinary Medicine, 41, 279-294.
  20. Rogers, G. W., van Arendonk, J. A. M. & McDaniel, B. T. (1988). Influence of production and prices on optimum culling rates and annualized net revenue. Journal of Dairy Science, 71, 3453-3462.
  21. Seegers, H., Beaudeau, F. & Fourichon, C. (1998). Reasons for culling in French Holstein cows. Prevent Veterinary Medicine, 36, 257-271.
  22. Soumya, D., Chakravarty. A. K., Singh. A., Upadhyay, A., Singh, M. & Yousuf, S. (2016). Effect of heat stress on reproductive performances of dairy cattle and buffaloes: A review. Veterinary World, 235-244.
  23. Stevenson, MA. & Lean, IJ. (1998). Descriptive epidemiological study on culling and deaths in eight dairy herds. Aust Vetenary Journal, 76, 482-488.
  24. USDA-AIPL. (2013). Trend in productive life for Holstein or Red & White. Available at http://aipl.arsusda.gov/eval/summary/trend.cfm Accessed April 30, 2013
  25. Weigel, K. A., Palmer, R. W. & Caraviello, D. Z. (2003). Investigation of factors affecting voluntary and involuntary culling in expanding dairy herds in Wisconsin using survival analysis. Journal of Dairy Science,86, 1482-1486.