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Reprodukce holštýnského skotu
VACHOUŠKOVÁ, Jana
In the past 20 years primary production of milk has made improvements in efficiency greater than any other branch of agriculture. Purpose of the project was to collect and compile information about synchronization programs used in Holstein cattle and then process the results of reproduction in a high yielding dairy farm. The growth of milk production was, however, met with a rising presence of "production diseases" - one of them being a steady decline of reproduction abilities of cows. Despite many theories attempting to explain this issue, the most widely accepted reason is that the efficiency was increased at the cost of dairy cattle welfare. This phenomenon is often called "Production Reproduction Antagonism" The Pernarec farm located in the western part of Pilsen region in the Czech Republic avoided this problem. This farm is used as an example to present the contemporary options in the control of reproduction in dairy farming and reproductive parameters. Data were gathered at the Pernarec farm, owned and operated by Úněšovský statek, a. s. All of them were provided by the above mentioned, collected from their zootechnical records and processed at Pernarec farm using PC Dart program. This work contains a visual representation of timetables of the most common synchronization protocols. Conception rate by services triggered by pedometers (natural heat) was 33%. Synchronization program Double Ovsynch had 58% rate of success when used for the first insemination while OvSynch used for the following ones displayed 47% rate of success. Cidr Synch used for repeatedly non-cycling dairy cows had 33% rate of success. Next to the conception rate, pregnancy rate was also monitored. Pregnancy rate achieved 30% in 2018, while year's production being 12173 kg. Key words: Holstein cattle, reproduction, synchronization protocols, dairy cow
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