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Inappropriate doses and quality of dietary nutrients cause problems in providing the protein and energy balance in a feed ration. Especially, energy value of the feed ration poses many problems to dairy cattle breeders and particularly in the perinatal period, which results in increased incidence of metabolic disorders. These disorders are today one of the most frequent causes of culling of dairy...
Relationships between production traits and the parity of Polish Holstein-Friesian cows. The objectives of the study was to describe the relationships between milk urea, protein, fat concentrations and the age of Polish Holstein-Friesian cows. The experiment was carried out at the research dairy farm of the Warsaw University of Life Sciences (WULS). From a herd of 320 Polish Holstein Friesian cows...
The purpose of this study was to examine the influence phase of lactation on the concentration of saturated fatty acid in milk of high performance dairy cows. The experiment was conducted on the twenty PHF cows at experimental dairy farm of the Warsaw University of Life Sciences. The cows were kept in a free-stall dairy shed and fed on TMR (total mixed ration) diet. The cows had continuous access...
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