Determination metabolic and nutritional status in dairy cows during early and mid lactation
2016
Đoković, Radojica (Faculty of Agronomy, Čačak (Serbia)) | Ilić, Zoran (Faculty of Agriculture, Priština-Lešak (Serbia)) | Kurćubić, Vladimir (Faculty of Agronomy, Čačak (Serbia)) | Petrović, Milan (Institute for Animal Husbandry, Belgrade-Zemun (Serbia)) | Caro-Petrović, Violeta (Institute for Animal Husbandry, Belgrade-Zemun (Serbia)) | Milošević, Božidar (Faculty of Agriculture, Priština (Serbia)) | Omerović, Izeta (State University of Novi Pazar, Novi Pazar (Serbia))
The objective of the present study was to investigate nutritional and metabolic status in Simmental cows during early and mid-lactation. Fifteen early lactating cows and 15 mid lactating cows were chosen for the investigation. Blood samples were collected to measure beta-hydroxybutyrate (BHB), non- esterified fatty acids (NEFA), triglycerides (TG), glucose and the activity of aspartate transaminase (AST). Early lactation as compared to mid lactating cows were found to have significantly higher (P<0.05) blood serum concentrations of NEFA, BHB and AST and lower blood serum concentrations of glucose (P<0.05) and TG (P>0.05). Significantly negative correlations were observed between BHB and glucose (P<0.01), BHB and TG (P<0.05), NEFA and glucose (P<0.05). Significantly positive correlations were observed between NEFA and BHB (P<0.05), NEFA and AST (P<0.05), glucose and TG (P<0.01). The results suggest that these parameters can serve as useful indicators of the nutritional and metabolic status of dairy cows during lactation.
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