Bio-economical model application in cattle breeding

Authors

  • Elli PÄRNA Estonian Univ. of Life Sciences, Institute of Veterinary Medicine and Animal Sciences, Kreutzwaldi 46, 51006 Tartu, Estonia
  • Heli KIIMAN Estonian Univ. of Life Sciences, Institute of Veterinary Medicine and Animal Sciences, Kreutzwaldi 46, 51006 Tartu, Estonia
  • Haldja VIINALASS Estonian Univ. of Life Sciences, Institute of Veterinary Medicine and Animal Sciences, Kreutzwaldi 46, 51006 Tartu, Estonia
  • Mirjam VALLAS Estonian Univ. of Life Sciences, Institute of Veterinary Medicine and Animal Sciences, Kreutzwaldi 46, 51006 Tartu, Estonia

DOI:

https://doi.org/10.14720/aas.2005.86.2.15166

Keywords:

cattle, dairy cows, breeds, Holstein, milk production, breeding programs, economics, bio-economical model, profit, Estonia

Abstract

Dairy production systems are complex and cannot be described by a single profit function. In a bio-economical model, relevant biological and economical aspects of the production system are described as a system of equations. These models describe the life cycle of a dairy cow, including inputs and outputs, as a function of biological traits and economic parameters. For the derivation of the economic values of Estonian Holstein dairy breed, a bio-economical model of a closed herd, which included the whole integrated production system was used. The total discounted profit for the herd was calculated as the difference between all revenues and costs that occurred during the whole life of animals born in the herd within one year and which were discounted to the birth year of these animals. Core elements of the program are modules describing the age distribution of the herd based on different possible fate of cows, the production level in each lactation and cost rations on a daily basis. Change of profit has been considered as a function of genetic change, not other changes of phenotype. Economic parameters reflect the marketing and management system in which genetic improvement will be expressed. Economic values for use in selection indexes were derived for milk-, fat- and protein production, length of productive life, calving interval and age at first breeding. Analysis of dairy production system with bio-economical model enables the breeders to find out revenues, costs and different parameters for dairy production system, and also to estimate milk production profit.

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Published

20. 12. 2005

Issue

Section

Original Scientific Article

How to Cite

PÄRNA, E., KIIMAN, H., VIINALASS, H., & VALLAS, M. (2005). Bio-economical model application in cattle breeding. Acta Agriculturae Slovenica, 86(2), 117–124. https://doi.org/10.14720/aas.2005.86.2.15166

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