The aim of the study was to investigate the effect of selected non-nutritional factors on urea content in milk of Polish holstein-friesian black-and-white cows. It was shown that the lactation group, the stage of lactation and actual daily milk yield do not have a significant effect on urea content in milk of analysed cows. In contrast, a statistically significant dependence was found between urea content in milk and both somatic cell count (at p ≤ 0.01) and the genetic group of animals (at p ≤ 0.05). The highest urea content was recorded in milk containing the lowest number of somatic elements and that coming from cows with the highest share (> 87.5%) of HF genes in their genotype.
|MLA||Pytlewski, Jarosław, et al. "The effect of some non-nutritional factors on urea level in milk of Polish holstein-friesian cows." Nauka Przyr. Technol. 5.3 (2011): #27.|
|APA||Jarosław Pytlewski, Ireneusz Antkowiak, Ryszard Skrzypek (2011). The effect of some non-nutritional factors on urea level in milk of Polish holstein-friesian cows. Nauka Przyr. Technol. 5 (3), #27|
|ISO 690||PYTLEWSKI, Jarosław, ANTKOWIAK, Ireneusz, SKRZYPEK, Ryszard. The effect of some non-nutritional factors on urea level in milk of Polish holstein-friesian cows. Nauka Przyr. Technol., 2011, 5.3: #27.|
Katedra Hodowli Bydła i Produkcji Mleka
Uniwersytet Przyrodniczy w Poznaniu
ul. Wojska Polskiego 71 A