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The paper compares the chemical composition of milk from Polish Holstein-Friesian Black-And-White (PHF HO) and Montbéliarde (MO) high-yielding cows. The research was based on the results of 36,796 test-day milkings: 25,617 from PHF HO and 11,179 from MO. The analysis included the influence of the successive lactation and its phase, the daily milk yield, the cytological quality of milk, and the season...
Badania przeprowadzono w stadzie krów phf. Doświadczeniem objęto krowy pierwiastki. W próbach mleka określono: zawartość białka, tłuszczu, laktozy, suchej masy, suchej masy beztłuszczowej, pH, oSH, gęstość, termostabilność. Z wydruków RW-2 odczytano wydajność krów. Podczas doświadczenia analizowano zróżnicowanie cech mleka w zależności od stadium laktacji. Wydajność mleczna krów pierwiastek wzrastała...
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