The investigations included total 515 milk samples which were collected from 309 cows of the main dairy cows' breeds used in Poland, i.e. Polish Holstein-Friesian Black-White variety (n=150), Polish Holstein-Friesian Red-White variety (n=77) and Simmental (n=82). There was determined a content of fat, protein and dry matter, a share of fat globules ranging in size, i.e. <6 μm, 6-10 μm and >10 μm as well as a fatty acids profile. It was shown that milk gained from Holstein-Friesian cows was characterized with a higher level of fat dispersion (over 70 % globules of <6 μm diameter and a higher percentage of short- and long-chain fatty acids (ca. 19 %). The Simmentalers' milk had a higher protein : fat ratio (about 0.89), a lower fat dispersion level (8.21 % globules of >10 μm diameter) and the highest share of the polyunsaturated fatty acids (3.28 %). Cows nutrition included pasture forage during summer (independently on the breed) had a significant influence (P≤0.01) on increased polyunsaturated fatty acids percentage (mean by 0.51 %). The winter milk, however, showed a significantly higher content of dry matter, fat and protein as well as a higher share of big-sized milk globules.
CITATION STYLE
Barłowska, J., Grodzicki, T., Topyła, B., & Litwińczuk, Z. (2009). Physicochemical properties of milk fat from three breeds of cows during summer and winter feeding. Archives Animal Breeding, 52(4), 356–363. https://doi.org/10.5194/aab-52-356-2009
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