Economic weights for production and functional traits of Czech dairy cattle breeds
2001
Wolfova, M. | Pribyl, J. | Wolf, J. (Vyzkumny Ustav Zivocisne Vyroby, Prague-Uhrineves (Czech Republic))
Economic weights of traits were calculated as partial derivatives of the profit function using a closed herd model for the whole population of Holstein or dual-purpose Czech Pied cattle in the Czech Republic. All revenues and costs connected with one generation of progeny of selected parents were discounted at a discounting rate of 10 % or 0 % to the birth date of the progeny (with or without quota for milk and milk fat). The following economic weights (10 % discounting rate, with quota) were calculated for Holstein or Czech Pied (in parentheses) cattle: milk yield with constant fat and protein contents 3.20 (3.71) CZK/kg, fat content 879 (1,186) CZK/%, protein content 6,272 (5,017) CZK/%, net daily gain 9.76 (10.51) CZK per g/day, dressing percentage 160 (185) CZK/%, feed conversion -163 (-184) CZK/MJ NE/kg, cow weight -5.4 (-4.9) CZK per kg, interval between first and last successful breeding of heifers -17.9 (-15.6) CZK/day, calving interval -23.1 (-17.0) CZK per day, cow longevity 397 (559) CZK/lactation. The relations between economic weights of milk, beef and reproduction traits were quite insensitive to changes in input and output prices. The economic weight of cow longevity considerably depended on the input parameters. Discounting was the most important factor influencing the relative economic importance of traits.
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