Indicators of production and reproduction and the metabolic profile of cows with low-milk fat syndrome
1998
Jovicin, S. (Naucni institut za veterinarstvo "Novi Sad", Novi Sad (Yugoslavia)) | Kovacevic, M. | Samanc, H. | Lalic, M. | Grujic, V. | Ac, A.
The metabolic profile was determined in two Holstein-Friesian groups of cows: the first included cows suffering from the low-milk fat syndrome ( mf=1.44+-0.52) and the second was the control group ( mf=3.35+-0.80). During the ongoing lactation, 7245.7 kg milk with 3.14 milk fat was recorded in the first group and 6348.2 kg milk containing 3.27 milk fat in the control group. The difference was determined to be 897.5 kg milk (p0.01), - 0.128 milk fat (p0.05) and 20.5 kg milk fat (p0.05). Concentrations of glucose, total protein content, albumins, bilirubin, urea, carotene, calcium, phosphorus, mangnesium, cholesterol, triglycerides were measured in blood as well as the activity of AST (aspartate aminotranspherase), ALT (alanine aminotransferase) and alkaline phosphatase in serum. Statistically lower glucose concentrations were determined in cows of the first group: 2.71 mmol/l in comparison to 3.97 mmol/l (p0.05) and significantly higher cholesterol concentration in serum: 1.73 mmol/l in comparison to 1.37 mmol/l in the control group (p0.01). No statistically significant differences were determined in the concentration of other metabolites and enzyme activities. Pregnancy was achieved in the first group with an average of 2.9 semen doses (a.i. index) as compared to 2.2 semen doses in the control group. The average number of days from calving to pregnancy ("service" period) was 181.1 day in the first group and 119.9 days in the control group, recording a difference of 61.2 days (p0.05).
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