<abstract xmlns="http://www.w3.org/1999/xhtml">
<p>The objective of this study was to evaluate the nutrition according to the milk metabolites and components during the seasonal dependence of the dairy cows. In the summer time, it was confirmed that significantly lower content of milk protein and fat (P &lt; 0.001) and lower milk, protein, and fat yields (P &lt; 0.001) occurred, compared to the autumn period. The content of milk lactose was not statistically significant (P > 0.5). The evaluation of nutrition according to protein in milk and milk urea in the summer period was confirmed in the 2nd group of milk samples which represented 53 % of the group’s higher content of milk urea, higher content of urinary nitrogen excretion, and a lower nitrogen utilization efficiency compared to the 1st group of milk samples. The autumn period was confirmed in the 2nd group of milk samples which represented 53 % of the group with higher milk yield and lower content of milk proteins and milk fat compared to the 1st group of milk samples. The evaluation of nutrition using the analysed content of milk urea and proteins in milk represents a suitable tool for evaluating the impact of malnutrition or overfeeding of energy and protein on milk production and other components.</p>
</abstract>

The objective of this study was to evaluate the nutrition according to the milk metabolites and components during the seasonal dependence of the dairy cows. In the summer time, it was confirmed that significantly lower content of milk protein and fat (P < 0.001) and lower milk, protein, and fat yields (P < 0.001) occurred, compared to the autumn period. The content of milk lactose was not statistically significant (P > 0.5). The evaluation of nutrition according to protein in milk and milk urea in the summer period was confirmed in the 2nd group of milk samples which represented 53 % of the group’s higher content of milk urea, higher content of urinary nitrogen excretion, and a lower nitrogen utilization efficiency compared to the 1st group of milk samples. The autumn period was confirmed in the 2nd group of milk samples which represented 53 % of the group with higher milk yield and lower content of milk proteins and milk fat compared to the 1st group of milk samples. The evaluation of nutrition using the analysed content of milk urea and proteins in milk represents a suitable tool for evaluating the impact of malnutrition or overfeeding of energy and protein on milk production and other components.

Evaluation of Nutrition According to Milk Metabolites and Components in Seasonal Dependence in Dairy Cows

Department of Animal Nutrition and Husbandry

University of Veterinary Medicine and Pharmacy in Košice

Folia Veterinaria

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

The objective of this study was to evaluate the nutrition according to the milk metabolites and components during the seasonal dependence of the dairy cows. In the summer time, it was confirmed that significantly lower content of milk protein and fat (P  0.5). The evaluation of nutrition according to protein in milk and milk urea in the summer period was confirmed in the 2nd group of milk samples which represented 53 % of the group’s higher content of milk urea, higher content of urinary nitrogen excretion, and a lower nitrogen utilization efficiency compared to the 1st group of milk samples. The autumn period was confirmed in the 2nd group of milk samples which represented 53 % of the group with higher milk yield and lower content of milk proteins and milk fat compared to the 1st group of milk samples. The evaluation of nutrition using the analysed content of milk urea and proteins in milk represents a suitable tool for evaluating the impact of malnutrition or overfeeding of energy and protein on milk production and other components.

The objective of this study was to evaluate the nutrition according to the milk metabolites and components during the seasonal dependence of the dairy cows. In...

Evaluation of Nutrition According to Milk Metabolites and Components in Seasonal Dependence in Dairy Cows

Published Online: Oct 03, 2023

Page range: 11 - 17

Received: Jun 26, 2023

Accepted: Aug 15, 2023

DOI: https://doi.org/10.2478/fv-2023-0022

Keywords
Holstein dairy cow, milk urea, milk yield, season

© 2023 Petra Timkovičová Lacková et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Evaluation of Nutrition According to Milk Metabolites and Components in Seasonal Dependence in Dairy Cows

Published Online: Oct 03, 2023

Page range: 11 - 17

Received: Jun 26, 2023

Accepted: Aug 15, 2023

DOI: https://doi.org/10.2478/fv-2023-0022

KeywordsHolstein dairy cow, milk urea, milk yield, season

© 2023 Petra Timkovičová Lacková et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
Holstein dairy cow, milk urea, milk yield, season