Abstract
Abstract. The modern equipment introduction into cow milking created technical possibilities for studying the milk flow curve and for using the results in cattle selection. In preventing mastitis, besides curing, other parameters of the milk flow curve could be used preventively. Research showed that cows that had the milk flow curve with a short duration of increasing flow rate (dIFR ≤ 0.40 min) and a larger quotient between the peak and down phase (QPD > 1.20) had also the least somatic cell count in milk (LSCC = 3.47, and 3.30 respectively). Such relation is favourable because increasing the relation, the duration of quick and uniform milking extends, and the duration of peak flow rate shortens. That also show correlation coefficients which were between the logarithmic somatic cell count in milk (LSCC) on one hand and the peak flow rate (dPFR), that means the quotient of peak and down phase (QPD) on the other hand negative (r= −0.25** and –0.27**). Breeding-selective procedures could create bull fathers and mothers with the most desirable milk flow curve and the duration of certain milking phases, whereby the somatic cell count in milk would be the least. Therefore it would be necessary to define desirable proportions of the milk flow curve with a special attention to the cow’s health udder.
Highlights
The possibilities of curing the cow’s udder from mastitis have been shrinking, and the reasons can be found in the EU decree which insists upon strict hygienic and sanitary rates as a way to healthy animals and their products
Udder traits and mastitis should be taken into consideration during planning of selection stratigies for improving dairy cattle perfomance, the h2 values for mastitis and udder traits are relatively low (NAUMANN and FAHR, 2000; IMBAYARWO-CHIKOSI et al, 2001; FAHR, 2002; BALTAY, 2002; AMIN et al, MIJIĆ et al.: Connection of milk flow curve to the somatic cell count in bovine milk 2002; SWALVE, 2003)
N. 102/2000) if the cow milk contains less than 400.000 somatic cells/ml, the milk gland is considered to be healthy, and the count above this shows a disturbed health udder
Summary
The possibilities of curing the cow’s udder from mastitis have been shrinking, and the reasons can be found in the EU decree which insists upon strict hygienic and sanitary rates as a way to healthy animals and their products. The technical possibilities which provide the mobile measuring LactoCorder unit have implied the complete milk flow curve measuring as well as other parameters (GÖFT et al, 1994; NAUMANN et al, 1998; FAHR, 2002). The use of such modern measuring technical could result with a larger cow number adjusted to machine milking, and a small cow number with udder illnesses (ROTH et al, 1998; NAUMANN and FAHR, 2000; FAHR, 2002). In order to prevent the health udder increase, the research aim was to establish the possibilities of using certain milk flow curve parameters in reducing the too large somatic cell count in milk. The research results could be applied in selecting the bull’s mothers and fathers in bovine selective breeding
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