engleski

Use of matabolic profiles in transition cows and cows with low conception rates on small-scale dairy farm

Eleven Holstein and seven Simmental cows in transition (summer– autumn, 2007), three to five years old with average body weight (BW) of 500-650 kg and yearly milk production of 6700 kg/cow/day were included in the study. The albumin, blood urea, glucose, total cholesterol, total bilirubin, minerals calcium (Ca), phosphorus (P), magnesium (Mg), enzymes gamma-glutamyl-transferase (GGT), aspartat-aminotranspherase (AST), alcalic phosphatase (AP) and lactate dehydrogenase (LDH), beta-hydroxybutirate (BHB), HDL and LDL cholesterol (HDLc and LDLc), non-esterified fatty acids (NEFA), superoxide dismutase (SOD) uand thiobarbituric acid reactive substances (TBARS) concentrations were determined in cows during the transition period and after the repeat breeding. Seven blood parameters and BCS had been markedly changed over the transition period and three after the repeated breeding. The suboptimal glucose, total cholesterol and albumin level and significant decrease in BCS are indicative for the energy deficiency that could have been consequences of suboptimal transition. The significantly lower magnesium and calcium concentration might be indicative for lower food intake, with inappropriate Ca:P ratio over the transition that might cause the sublinical post-partal diseases. Variability within the physiology range of total bilirubin, LDH and AP within the repeated breeding may have been indicative of the commencing reproductive disorders and the potential causes.

blood parameters; cows; transition; reproduction; health

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