The present study was conducted to determine some environmental factors affecting birth weight, weaning weight and daily live weight gain of Holstein calves of a livestock facility in Izmir, Turkey. The data on 2091 calves born between the years 2005-2010 were used to assess the relevant parameters. Effects of calving year, calving month, calf gender and the interaction between calving year and calving month on calves’ birth weights were highly significant. The overall mean of birth weights was 39.6±0.15 kg. In addition, effects of calving year, calving month, gender, birth weight, weaning age, calving year x calving month, calving year x gender and calving year x calving month x gender interactions on weaning weight (WW) and daily live weight gain (DLWG) were highly significant. The overall means of WW and DLWG were respectively found to be 79.7±0.20 kg and 525±2.5 g. A one kilogram increase in birth weight resulted in an increase of 0.89 kg in weaning weight and a decrease of 1.26 g in daily live weight gain. Prenatal temperature-humidity index (THI) affected birth weight of calves (R2=0.67). Increasing THI from 50 to 80 resulted in 3.8 kg decrease in birth weight.

The aim of the study is to assess the results of managing production resources in farms focused on animal production, which were covered by agricultural accounting in the FADN system in 2016. The analysis covered the production and economic results as well as the productivity and profitability of land, labor and capital resources of farms focused on dairy cattle, swine and slaughter cattle, sheep and goats. The results of the researched farms presented in the study point to a significantly higher level of production and economic results as well as resource management efficiency in pig farms, especially in relation to farms keeping cattle for slaughter, sheep and goats, which resulted from their larger scale and intensity of production. Farms specializing in slaughter of cattle, sheep and goats obtained a negative economic result, therefore subsidies for the operation of such farms were conditioned by their positive final result and economic efficiency of resource management. / Synopsis. Celem opracowania jest ocena wyników gospodarowania zasobami produkcyjnymi w gospodarstwach nastawionych na produkcję zwierzęcą, które były objęte rachunkowością rolną w systemie FADN w 2016 roku. Analizie poddano wyniki produkcyjne i ekonomiczne oraz produktywność i dochodowość zasobów ziemi, pracy i kapitału gospodarstw nastawionych na chów bydła mlecznego, trzody chlewnej oraz bydła rzeźnego, owiec i kóz. Zaprezentowane w opracowaniu wyniki badanych gospodarstw wskazują na znacznie wyższy poziom wyników produkcyjnych i ekonomicznych oraz efektywności gospodarowania zasobami w gospodarstwach trzodowych, zwłaszcza w odniesieniu do gospodarstw prowadzących chów bydła rzeźnego, owiec i kóz, co wynikało z ich większej skali i intensywności produkcji. Gospodarstwa specjalizujących się w chowie bydła rzeźnego, owiec i kóz uzyskały ujemny wynik ekonomiczny, dlatego dopłaty do działalności tego typu gospodarstw warunkowały ich dodatni wynik końcowy oraz efektywność ekonomiczną gospodarowania zasobami.