EFFECT OF MILK UREA AND PROTEIN LEVELS ON FERTILITY INDICES IN COWS
An analysis of the effect of milk urea and protein levels in four consecutive lactations on fertility indices of Blackand- White Polish Holstein-Friesian cows, milk recorded in the Kujawsko-Pomorskie province has been made. Poorer fertility indices were found in first-calf heifers and second lactati...
| Main Authors: | , , |
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| Format: | Article |
| Language: | Bulgarian |
| Published: |
University of Zagreb, Faculty of Agriculture
2011-01-01
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| Series: | Journal of Central European Agriculture |
| Subjects: | |
| Online Access: | http://jcea.agr.hr/articles/868_EFFECT_OF_MILK_UREA_AND_PROTEIN_LEVELS_ON_FERTILITY_INDICES_IN_COWS_en.pdf |