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Dairy cow pasture in relation to somatic cell count in raw cow milk
HNISOVÁ, Jana
The aim of this study was to observe the PSB (somatic cell counts) of raw milk. For this purpose we used dairy cows from different dairy cattle farms, i.e. there were compared three dairy herds using summer pasture and five dairy herds without using summer pasture. The estimated dairy farms (herds) used different technology of stables and milking process, diverged in predipping and postdipping of lacteal gland, and managed with different number of cows in herd. There were found significant differences (P = 0,03; the statistical significance was declared at P < 0,05) between PSB values (in average 260,99.103.ml-1) of summer pastured herds and PSB values (in average 282,44.103.ml-1) of non summer pastured herds, both (pastured and non pastured herds) estimated during the year 2007. The increasing amount of PSB was measured at the beginning of pasture season, and then followed the decreasing of PSB in two of observed herds. One of the observed herds (herd with higher presence of subclinical mastitis) had the same level of PSB during the whole pasture season.

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