Analysis of selected indicators of milk production and fertility in the herd of Holstein cattle

This bachelor work is focused on the analysis of the selected indicators in a flock of miliking the cattle, which can affect the levels of milk and reproductive performance. Monitoring the factors at the workplace of the exiled Agrospol Mladá Vožice a.s., which behaves like a Holstein and Simmental cattle. Since 2008, the company used převodné crossing of Czech pied cattle on Holstein cattle. In 2012, the number of cows in an average of 249 329 pieces in milk. For the analysis of selected indicators have been monitored 190 pieces of dairy cows, according to the genotype, the order of lactation and age at first calving. Sighted in a herd of dairy cows, in groups sorted according to the genotype of the best results of a reproduction H 99-88 and that the collection interval (78 days), service period (80 days) and the intervening period (365 days). The worst performers were from the genotype (H) 100. The collection interval was 77 days, a service period of 105 days, and in the meantime, 390 days. According to the order of lactation of dairy cows on the other were the best lactation (collection interval 78 days, a service period of 87 days and in the meantime, 374 days). The worst performers were dairy cows at the fifth and later lactation (collection interval 78 days, 114 days and the period of service in the meantime, 401 days). According to the age at first calving have Calved in the age of prvotelky 661-720 days for best results (77 days interval, collection service period 85 days and in the meantime, 370 days) and prvotelky Calved in the age of 721-780 days have the worst results (the collection interval 77 days, service period and the interim 100 380 days). Overall reproductive performance can be assessed as good. In all indicators of milk yield, would appear to be the best kříženky H 87-75 (12.016 kg milk fat, 3.65%, 3.35% protein). According to the order of lactation were the best results at the fourth lactation (11 772,34 kg milk, 3.55% fat and 3.29% protein). According to the age at first calving had the best performance under 660 days Calved prvotelky (11 018,46 kg milk, 3.48% fat and 3.21% protein). From the results of the abovementioned indicators it strongly suggest that the fertility indicators are at a very good level, even when their performance is over 10 000 kg of milk. The higher genetic potential of cows for milk production, the higher the demands on management of the herd. As a result, it is important to pay due attention to nutrition and health status of dairy cows high utility