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Vliv počtu návštěv dojnic v systému robotizovaného dojení na parametry mléčné užitkovosti
Mácha, Josef
The aim of the thesis was to clarify the influence of the number of visits of dairy cows in the robotic milking systems on milk yield parameters. An annual observation was carried out for this purpose (November 2017 to October 2018). A total of 729 dairy cows (cases) were evaluated. Among the parameters of milk yield were mainly daily milk yield (kg of milk), number of lactation, lactation phase (days in milk). Furthermore, the influence of temperature in the stable (° C) on the frequency of dairy cows' visits in the robotized milking system was evaluated. There was a highly statisticaly significant effect of the number of successful dairy cow visits in milking robot on the lactation phase, daily milk yieldand fat and protein content of milk (p <0.01). It was found, that with the increasing frequency of dairy cow visits during the day (n = 1 to n = 5), the average daily milk yield of these cows increases (from 18.3 to 48.4 kg of milk), while the fat content and protein decreased (from 4.53 to 3.84%, from 3.59 to 3.40% respectively). Furthermore, it was found that dairy cows with a lower lactation phase had a higher frequency of visits (from 189 days to 25.8 days). Further, a certain trend was observed where higher frequency of visits was found in older cows and lower frequency of visits in young cows (p> 0.05). Furthermore, it was found that the air temperature in the stable did not affect both the overall visit rate of the milking robot and the number of successful or unsuccessful visits (p> 0.05).
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Analýza chovu masného skotu a způsoby výkrmu v podmínkách ČR
Mácha, Josef
In this bachelor thesis, I deal with the importance of breeding beef cattle or suckler cows, whose breeding in the Czech Republic is still a new industry, even though it operates here for over ten years. It is a system of beef cattle production with efficient use of permanent grassland, budget housing and low labor costs. The second chapter focuses on the current numbers of beef cattle breeds reared in the Czech Republic, which will be followed by the third chapter, which will be engaged in the distribution and description of selected beef cattle. In the second part of this work is described a system of rearing cows, beef cattle breeds, and the last chapter focuses on the fattening of the beef cattle.
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