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The material for the analyses comprised blood samples collected from 65 Zlotnicka Spotted (Zlp) sows and 43 Zlotnicka White (Zlb) sows born and kept in two herds in Wielkopolska. While analysing reproductive, fattening and slaughter traits, information was collected on 290 litters, including 180 litters of Zlp sows and 110 litters of Zlb sows. Intravital measurements were taken using a Piglog 105...
Celem badań było określenie czynników wpływających na zrównoważenie bilansu energii i białka u krów o wysokiej wydajności. Analizowano wydajność dobową mleka, numer i miesiąc laktacji. Badania przeprowadzono w stadzie o wydajności 11 tys. kg mleka/rok, na 517 krowach w czasie laktacji. Krowy w laktacji podzielone były na cztery grupy technologiczno-żywieniowe. Żywione były dawką TMR rozliczoną na...
The analysis concerned the longevity and production period of beef cattle of seven breeds born in 1990-2011, as well as the reasons for culling the animals. We observed a distinct tendency for a decrease in the average production period in beef cattle herds. It has been estimated that the longevity of beef cattle is influenced highly significantly by the sex, breed, birth year, and birth season. Most...
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