The effect of some non-nutritional factors on urea level in milk of Polish holstein-friesian cows
Summary.
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.
Key words: cattle, Polish holstein-friesian, milk, urea
Full text available in English in Adobe Acrobat format:https://www.npt.up-poznan.net/pub/art_5_27.pdf
For citation:
| 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. |
Corresponding address:
Jarosław Pytlewski
Katedra Hodowli Bydła i Produkcji Mleka
Uniwersytet Przyrodniczy w Poznaniu
ul. Wojska Polskiego 71 A
60-625 Poznań
Poland
e-mail: jarekpyt@jay.up.poznan.pl
Jarosław Pytlewski
Katedra Hodowli Bydła i Produkcji Mleka
Uniwersytet Przyrodniczy w Poznaniu
ul. Wojska Polskiego 71 A
60-625 Poznań
Poland
e-mail: jarekpyt@jay.up.poznan.pl
Accepted for print: 11.04.2011