The analysis of a longevity and the reasons of milking cow's cull from the herd ZZD IZ Pawlowice
2005
Sobek, Z. (Akademia Rolnicza, Poznan (Poland). Katedra Genetyki i Podstaw Hodowli Zwierzat) | Dymarski, I. (Instytut Zootechniki, Balice (Poland). Zootechniczny Zaklad Doswiadczalny, Pawlowice) | Piekarska, O. (Akademia Rolnicza, Poznan (Poland). Katedra Genetyki i Podstaw Hodowli Zwierzat)
On the basis of 3457 cows that were born between 1966 and 1999 in ZZD IZ Pawlowice, the reasons of a cull were analysed. No dependences between the age of the first calving and the longevity of cows were found. The main reasons of the cull were the reproduction problems, especially infertility. The grade of the resons of a cull caused by the fertility problems and the longevity highly depends on the rate of hf genes
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