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Titolo:
Economic weights for production and functional traits of Czech dairy cattle breeds
Autore:
Wolfova, M; Pribyl, J; Wolf, J;
Indirizzi:
Res Inst Anim Prod, Prague 10401, Czech Republic Res Inst Anim Prod Prague Czech Republic 10401 gue 10401, Czech Republic
Titolo Testata:
CZECH JOURNAL OF ANIMAL SCIENCE
fascicolo: 10, volume: 46, anno: 2001,
pagine: 421 - 432
SICI:
1212-1819(200110)46:10<421:EWFPAF>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRODUCTION CIRCUMSTANCES; OUTPUT LIMITATIONS; CARCASS TRAITS; VALUES; OBJECTIVES; SITUATIONS; LONGEVITY; SELECTION;
Keywords:
dairy cattle; dual-purpose cattle; economic weights; bioeconomic model; profit function;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Wolfova, M Res Inst Anim Prod, POB 1, Prague 10401, Czech Republic Res Inst Anim Prod POB 1 Prague Czech Republic 10401 Republic
Citazione:
M. Wolfova et al., "Economic weights for production and functional traits of Czech dairy cattle breeds", CZEC J ANIM, 46(10), 2001, pp. 421-432

Abstract

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. The calculations were carried out with and 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 (1186) CZK/%, protein content 6272 (5017) 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. A sensitivity analysis of the influence of changes in input parameters on the economic weights was performed. The relations between the 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 importantfactor influencing the relative economic importance of traits.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 17:24:23