Fertility of cows utilized in areas polluted by copper mill
Języki publikacji
PL
Abstrakty
EN
The analysis concerned 543 intercalving and interpregnancy periods and insemination indices in Lowland Black and White cows utilized between 1973-1980 in seven breeding farms situated in various distances from the copper mill in Głogów. On the basis of pollution maps the breeding farms were divided into 3 zones depending on intensity of emission. The aim of the investigations was to find out whether any differences existed between some chosen indices of fertility in cows kept in an environment polluted with heavy metals. Regardless of the distance of the areas where the cows were utilized from the emission source the fertility indices exceeded the values generally accepted as optimal.
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