Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl
Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 34

Liczba wyników na stronie
first rewind previous Strona / 2 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  powstanie rasy
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 2 next fast forward last
EN
The paper presents an outline of Japanese Wagyū beef cattle, the husbandry of which has a long tradition and history in Japan. Wagyū cattle originate from Asian cattle breeds, however separation from continental breeds occurred approximately 3500 years ago. Throughout the centuries, Wagyū was kept for helping in the field on small Japanese farms and as a draught animal. The change in the breed usage and breeding cattle for meat started in the 1860s. At the end of the nineteenth century, on account of crossbreeding with imported cattle Wagyū started to lose their original character. However, since 1919 the Wagyū restitution was initiated and pure breed animals are bred. The export of Wagyū from Japan started in 1976, but recently it has become more significant. The uniqueness of the meat of Wagyū stems from the intramuscular fat, which is evenly distributed and contributes to a characteristic marbled appearance of the carcass. High concentrations of non-saturated omega-3 and omega-6 acid are present in the meat of the Japanese beef cows. Wagyū cattle seem to be a valuable experimental model for bovine reproduction. The first cloned calf originated from Wagyū. Some assisted reproduction techniques were successfully conducted and improved in Wagyū, e.g. superovulation, embryo transfer and cloning.
EN
The scheme, aim and stages of creating the new breed of Wrocław Meat pigeon, raised at Wrocław University of Environmental and Life Sciences were presented. The studies on the growth of pigeons demonstrated that the highest growth rate of young pigeons of that breed was observed at the period from hatching up to the 21st day of life, and then, it considerably decreased. At the age of 4 weeks, the pigeons of the discussed breed obtained insignificantly lower values of body weight before slaughter and of carcass weight, and higher values of dressing percentage, dry matter and protein content when compared to the pigeons of King and Strasser breeds at the same age.
first rewind previous Strona / 2 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.