Uticaj broja somatskih ćelija na kvantitativne i kvalitativne osobine mlečnosti krava / The effect of somatic cell count on quantitative and qualitative milking characteristics of cattle
2013
Jež, G. (Poljoprivredni fakultet, Beograd-Zemun (Srbija)) | Relić, R. (Poljoprivredni fakultet, Beograd-Zemun (Srbija)) | Cvetanović, D. (Poljoprivredni fakultet, Novi Sad (Srbija))
Results of this paper show the effect of somatic cell count (SCC) on quantitative (average daily milk yield, average milk yield of morning milking and average milk yield of evening milking) and qualitative (content of protein and milk fat, as well as protein/ milk fat ratio) milking characteristics of cattle. Total of 1168 of raw milk samples, grouped depending on SCC (1st- less than 200K, 2nd- between 200K and 300K, 3rd- between 300K and 400K, 4th- between 400K and 500K, and 5th- over 500K of somatic cells), originating from seven farms with similar breeding, housing, feeding and health care conditions, have been analyzed. Statistic analysis shown that SCC has significant influence on average daily milk yield, average milk yield of morning milking, average milk yield of evening milking, protein content and protein/milk fat ratio (p<0,001), and there was also influence on milk fat content, but with lower level of statistical significance (p<0,05). With raise in SCC level average milk yield decreases also, depending on milking time (morning/evening) same tendency is present. However, increasing of SCC increases protein and milk fat content.
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