[Relation between biochemical parameters in the blood of cows and milk production]. / Vztah medzi niektorými biochemickými zlozkami v krvi kráv a produkciou mlieka.

No differences in blood samples were found out when the biochemical parameters in arterial and venous blood of dairy cows were compared before and after milking. Negative correlation coefficient (r = -0.3460) approaching the significance level was determined by comparing the values for milk yield on the day of sampling (in ascending phase of lactation) and protein content in venous blood after milking, and significant negative correlation coefficient (r = -0.3813) for daily milk yield and gamma-globulin concentration in venous blood before milking. The relationship between butterfat content on the day of milking and the values of alkaline phosphatase can be characterized by significant up to highly significant negative correlation coefficients in all three blood samples (r = -0.3232 to -0.3908).

[The technic of arterial blood-specimen collection in cattle]. / Metóda odberu arteriálnej krvi u hovädzieho dobytka.

A simple method of collecting arterial blood in cattle by puncture of the arteria iliaca externa per rectum is described. Individual collections do not induce any local reaction nor do they impair the overall condition and milk yield of the animals.