The blood urea content in dairy cows depending on breeding location and nutrition
2010
Važić, B., Faculty of Agriculture, Banja Luka (Bosnia and Herzegovina) | Drinić, M., Faculty of Agriculture, Banja Luka (Bosnia and Herzegovina) | Krajinović, M., Faculty of Agriculture, Novi Sad (Serbia) | Rogić, B., Faculty of Agriculture, Banja Luka (Bosnia and Herzegovina)
Blood samples of dairy cows have been taken from two locations in Bosnia and Herzegovina: Mrkonjić Grad and Gradiška. Dairy cows from Mrkonjić Grad location were fed with the diet based on fodder with the minimal addition of fodder concentrate. Cows from Gradiška location were fed with the diet based on fodder as well, but with the sufficient amount of the fodder concentrate. The urea blood content of the cows from Mrkonjić Grad location was within the normal physiological range. On the other hand, the urea blood content of the cows from Gradiška location was above the normal physiological limit. According to the phase of dairy cow production, the lowest urea concentration was in the dry period. Urea concentration was above the physiological limit in three phases of lactation. There was a very high urea content in the summer nutrition period. The data showed that there were statistical differences in the urea content depending on the locations. The statistical differences between the dairy cow production phases and the interaction of both the location and production phases were not noticed. In the summer nutrition period there was a higher urea content at the both locations. The differences between the urea blood content depending on location, nutrition period and interaction are both statistically significant.
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