The effect of paragenetic factors on body development of Simmental bull dams

Abstract

Body development and type are very important indices of production ability of cows, their capacity to consume sufficient quantity of food, produce technologically high quality milk, reduce the energy consumption in production of milk, remain in exploitation as long as possible and give more progeny. This research included 278 cows of Simmental breed selected into the category of bull dams on the territory of Republic of Serbia. By application of method of least squares following average values of exterior measures were obtained: height to withers 136,04 cm; carcass length 165,81 cm; breast depth 73,61 cm; breast girth 201,12 cm; body mass 695,29 kg. Regions influenced statistically highly significantly all investigated exterior traits (P lt 0,01). Year of measuring had no statistically significant effect (P>0,05) on body development of Simmental bull dams. Obtained values were considerably uniform without any greater oscillations. .

Telesna razvijenost i tip su veoma važni pokazatelji proizvodnih sposobnosti krava, njihovih mogućnosti da konzumiraju dovoljne količine hrane, daju tehnološki kvalitetno mleko, smanje utrošak energije u proizvodnji i što duže ostanu u proizvodnji i daju veći broj potomaka. Ovim istraživanjem je obuhvaćeno 278 krava simentalske rase odabrane u kategoriju bikovskih majki na području Republike Srbije. Primenom metoda najmanjih kvadrata dobijene su prosečne vrednosti eksterijernih mera: visina grebena 136,04 cm; dužina trupa 165,81 cm; dubina grudi 73,61 cm; obim grudi 201,12 cm; telesna masa 695,29 kg. Regioni su statistički vrlo značajno uticali na sve ispitivane eksterijerne osobine (P lt 0,01). Godina merenja nije statistički značajno uticala (P>0,05) na telesnu razvijenost bikovskih majki simentalske rase. Dobijene vrednosti bile su dosta ujednačene bez nekih većih oscilacija. .