Wydanie 322(36)4 2015

Stały URI dla kolekcji

https://oa.zut.edu.pl/handle/20.500.12539/712

Przeglądaj

Przeglądaj Wydanie 322(36)4 2015 wg Temat "age at first calving"

Teraz wyświetlane 1 - 1 z 1
  • Miniatura
    PozycjaOpen Access
    Effect of the Age at First Calving on Milk Performance in Simental Cows
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2015) Cioch, Barbara; Czerniawska-Piątkowska, Ewa; Rzewucka-Wójcik, Edyta; Department of Ruminant Science, West Pomeranian University of Technology, Szczecin, Poland; Department of Ruminant Science, West Pomeranian University of Technology, Szczecin, Poland; Department of Ruminant Science, West Pomeranian University of Technology, Szczecin, Poland
    The studies included 88 Simental cows which were kept on farm in the West Pomerania province. The effect of age at first calving depending on milk performance in subsequent 305-day lactations were determined. The highest milk, fat and protein yield in third lactation was characteristic for the cows calving between 26 and 29 month of age, whereas in the first and second lactations – for cows calving below 26 month of age. The highest fat and protein content was observed in milk of cows which calved late – after the age 29 months. No clear dependence was found between the age of first calving and milk performance traits in lactations.