Author/Authors :
Hanus، O نويسنده 1Dairy Research Institute Ltd., Prague, Czech Republic , , Bjelka، M. نويسنده 1Dairy Research Institute Ltd., Prague, Czech Republic , , Kucera، J نويسنده 1Dairy Research Institute Ltd., Prague, Czech Republic , , Zhang، Y نويسنده Anhui Agricultural University, Department of Animal Sciences, College of Animal Science and Technology, Hefei, P.R. China , , Roubal، P نويسنده 1Dairy Research Institute Ltd., Prague, Czech Republic , , Vyletelova، M نويسنده 1Dairy Research Institute Ltd., Prague, Czech Republic , , Kopecky، J نويسنده 1Dairy Research Institute Ltd., Prague, Czech Republic ,
Abstract :
Dairy paradoxes are the questions of relations between milk indicators (MI) such as fat content (F), urea concentration (U),
somatic cell count (SCC), and milk freezing point (MFP). The aim of the study was to explain some paradox relationships.
Relations of relevant MI in native milk and modified (F content change = MOD) samples were compared. Not even in an incorrect
sampling or intentional technological milk modification such as MOD can it be thought of a possibility that it would
come to a noticeable influencing of MFP (F × MFP; r = 0.03; P > 0.05) even though F is an important part of solid. Possible
problems of a dairy herd with MFP (MFP × SCC; r = –0.36; P < 0.05 for native milk) cannot be mitigated by tolerance to
higher SCC levels in bulk milk, either because of the risk of decrease of milk yield and quality. An incorrect milk sampling
with an increased F content or its technological increase (dead milk) apparently damages milk quality in SCC (F × SCC;
r = 0.009; P > 0.05 for native milk; but r = 0.93; P < 0.001 for MOD, where the F increase by 1% causes the SCC growth by
176 × 103 ml–1)
