Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

1 Folia Pomeranae Universitatis Technologiae Stetinensis. Agricultura, Alimentaria, Piscaria et Zootechnica

1 2014

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

The impact of efficiency on breeding indicators of cows

100%

Czerniawska-Piatkowska E. , Gajdka W.

Folia Pomeranae Universitatis Technologiae Stetinensis. Agricultura, Alimentaria, Piscaria et Zootechnica

2014

tom 31

The aim of this study was to analyze the impact of the level of milk productivity on the length of interpregnancy period in a herd of cows of Polish Holstein-Friesian breed black-andwhite breed (phf cb). Three divisions of milk productivity in cows herd has been adopted: less than 6.000 kg per lactation of 305 day, from 6.000–9.000 kg and more than 9.000 kg of milk. In the present herd of cattle it could be concluded that the level of milk productivity of cows affected the length of interpregnancy periods. It was noted that with the increase in milk productivity prolonged interpregnancy periods. Analyzing the value of the index of insemination depending on the level of milk productivity of cows can be observed that the lowest value of the index (1.23) was found in cows with a capacity of less than 6.000 kg. The highest index of insemination value (1.47) was observed in cows with milk productivity above 9.000 kg.