Influence of breeding technology on the utility characteristics of the dairy cows

The aim of this bachelor thesis was to evaluate fertility and milk performance due to technology used in new dairy cow housing. Monitoring was carried out between 2008 and 2009 in the farm Agrospol, which is situated in Malý Bor. All cows were kept in the same technological conditions. Monitoring was carrieed out in 110 dairy cows of Czech spotted (C), Holstein (R) and crossbreeds of these cows (CxR).There were measured indicators of fertility (insemination interval, service period, interim and age at first calving) and indicators of milk production (lactation length, milk quantity, fat content, protein and lactose content).There was found a statistically significant difference in the length of insemination interval in the reproductive indicators. Cows "C" had the lowest numbers in all reproductive indicators: insemination of 72 days, service period 101 days, 386 days of interim and age at first calving 779 days (25/19). Holstein cows reached a length of service period of 133 days which is about 32 days higher than the value of dairy cows "C". Holstein dairy cows in lactation produced at average 9913.6 kg of the milk, cows "CxR" 9839.3 kg and Czech spotted cows 9142.3 kg. There was not found statistically significant difference between these values. The best results in milk production per standard lactation reached cows "C" (9528.7 kg) in the second lactation, cows "CxR" (9751.9 kg) as same as cows "R" (10 695 kg) in the third and following lactations. The highest average fat content of dairy cows had "CxR" with a value of 4.71 %; the fat content was 4.61 % by "R" cows and 4.56 % by "C" cows. There was not found a significant difference at average protein content of dairy cows. Cows "C" reached 3.36 %, cows "CxR" 3.38% and cows "R" 3.35 % of the protein