The examing of values of dairy cows energy and protein status indicators | Ispitivanje vrednosti pokazatelja energetskog i proteinskog statusa mlečnih krava
2021
Davidović, Vesna | Stojanović, Bojan | Perišić, Predrag | Aleksić, Slavica | Božičković, Ivana | Relić, Renata
The aim of this study was to examine the values of energy and protein statusindicators of Holstein Frisian dairy cows in different production periods (20 daysbefore calving, 30th and 90th day of lactation period). The study included 76 clinicalhealthy cows, which were divided into 2 groups. The first group consisted (n = 38) ofpregnant heifers (or cows in first lactation after calving), and the second group (n =38) consisted of cows calved multiple times (cows from second to fourth lactation).The results indicate that average concentration of glucose, albumins and urea atboth groups in all phases of investigation are not significantly different in testedspecimens (p>0.05). β-hydroxybutyrate concentration (BHBA) at pregnantindividuals in late pregnancy period was statistically lower than 30th and 90th dayof lactation, with p<0.05 at first and p<0.01 at second group. Lower values of totalproteins at both groups were recorded 20 days before calving relative to lactationperiod, with statistical signifikante at p<0.01 for the first and p<0.05 for the secondgroup. Heifers’ blood globulin concentration was significantly lower (p<0.05)relative to values determined after calving, during lactation period. Multiparouscows before calving also had lower average values of globulin, but differences werenot significant.
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