- Tytuł:
-
The impact of age at the first calving on lifetime milk yield, life span and herd life of dairy cows
Wpływ wieku pierwszego ocielenia na wydajność życiową, długość życia i użytkowania krów mlecznych - Autorzy:
-
Kalińska, A.
Slósarz, J.
Gołębiewski, M.
Wójcik, A.
Przysucha, T.
Kuzińska, B. - Powiązania:
- https://bibliotekanauki.pl/articles/2082422.pdf
- Data publikacji:
- 2019
- Wydawca:
- Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
- Tematy:
-
age of the fi rst calving
milk yield
herd life
dairy cows - Opis:
- The impact of age at the fi rst calving on lifetime milk yield, life span and herd life in dairy cows. The increasing importance of functional traits (e.g. longevity) in cattle breeding is the result of their direct effect on profi tability of production. The main objective of the study was to determine the infl uence of age of the fi rst calving on lifetime milk yield, life span and herd life in Polish dairy cows. Cows were kept on farms with milk performance recording system. One-way analysis of variance was used to calculate the impact of age of the fi rst calving on selected traits. Cows that fi rst calving occurred at the age of 791–850 day achieved the highest lifetime milk, fat and protein yield per one day of life (P ≤ 0.01). Moreover, their life span was also the longest (P ≤ 0.01) and milk and protein yield per 1 day of utilization were the highest (P ≤ 0.01). Obtained results suggest that the most favorable time of calving for dairy heifers is between 791–850 day of life. Therefore, milk producers should carefully consider the most suitable time of heifers insemination in order to achieve the most satisfying milk production.
- Źródło:
-
Annals of Warsaw University of Life Sciences - SGGW. Animal Science; 2019, 58[3]; 215-221
1898-8830 - Pojawia się w:
- Annals of Warsaw University of Life Sciences - SGGW. Animal Science
- Dostawca treści:
- Biblioteka Nauki
Artykuł