Original scientific paper
Correlations Between Somatic Cells Count and Milk Composition with Regard to the Season
Marija Rajčević
Klemen Potočnik
Jože Levstek
Abstract
On four farms with 1100 cows of Black-and-White breed the correlations between somatic cell count (SCC) in milk and milk composition in different seasons of the year were studied. Three-year data from AP milk recording were analysed (years 2000 to 2002), which meant 29,298 samples of milk. Milk fat, proteins and lactose were determined using Milco-Scan while somatic cells were determined with Fossomatic 90. The three-year average content of fat was 4.16 % (CV=18.75 %), 3.41 % (CV=12.02 %) of proteins, and 4.58 % (CV=5.68 %) of lactose. SCC averaged to 499.2 x 103 / ml milk. The threeyear average showed a statistically significant (p≤ 0.0001) positive correlation between LSCC and fat content (0.130) and protein content (0.240), and a statistically highly significant negative correlation between LSCC and lactose content (-0.423) and daily milk production (-0.286). In special seasons of the year the correlations for fat (0.177), proteins (0.287) and amount of milk (- 0.327) were the highest in spring, while (-0.461) in autumn for lactose; all of them were statistically highly significant. The milk composition was in a statistically highly significant correlation with SCC in milk and year season.
Keywords
milk; correlation; milk composition; somatic cells
Hrčak ID:
12335
URI
Publication date:
15.9.2003.
Visits: 2.736 *