Metabolic profile of blood and milk in dairy cows during heat stress
2010
Cincovic, M.R., University of Novi Sad, Novi Sad (Serbia). Faculty of Agriculture | Belic, B., University of Novi Sad, Novi Sad (Serbia). Faculty of Agriculture | Stojanovic, D., Scientific Veterinary Institute Novi Sad, Novi Sad (Serbia) | Kovacevic, Z. | Medic, S., VetLab Laboratory, Belgrade (Serbia) | Simic, V., VetLab Laboratory, Belgrade (Serbia)
Hot weather, which is characteristic during the summer in the Vojvodina region (Serbia), has adverse effects to performance and well being of dairy cows. Experimental model included 20 Holstein-Friesian cows, 10 cows were observed during winter, and 10 cows during summer (stress period). The reduction in plasma glucose and cholesterol during the hot periods were significant. Total protein concentration shown significant increase. Milk fat, protein and dry matter decrease during hot period. Changes in blood and milk were in statistic significant correlation (except milk fat vs. blood cholesterol). Decrease of feed efficiency, and change in gluconeogenesis is the main reason for these results.
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