Title
THE ANALYSIS OF A LONGEVITY AND THE REASONS OF MILKING COWS’ CULL FROM THE HERD ZZD IZ PAWŁOWICE
Autor
Zbigniew Sobek, Ireneusz Dymarski, Olga Piekarska
Keywords
longevity, miliking cows, the reasons of cows’ cull
Abstract
On the basis of 3457 cows that were born between 1966 and 1999 in ZZD IZ Pawłowice, 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 reasons of a cull caused by the fertility problems and the longevity highly depends on the rate of hf genes.
Pages
97-112
Cite
Sobek, Z., Dymarski, I., Piekarska, O. (2005). THE ANALYSIS OF A LONGEVITY AND THE REASONS OF MILKING COWS’ CULL FROM THE HERD ZZD IZ PAWŁOWICE. Acta Sci. Pol. Zootechnica, 4(2), 97-112.
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