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Vyhodnocení vztahu stájového mikroklimatu, užitkovosti a úhynu z vybraného chovu prasat
KOPIC, Pavel
The diploma thesis consists of a literature review specializing in pig breeding from a legislative, but also a physical view of the stable microclimate with its effects on the performance and health status of pigs for fattening. In the company Mavela Dynín a.s. with the operation in Mazelov, these data were gradually ascertained in the hall divided into two parts (by the pond, by the road). Ammonia concentrations, relative humidity, temperature and their effect on pig death. From the measured data, arithmetic averages of ammonia concentration and air flow were calculated, which determined the mass flows of the pollutant in mg.s-1 in and out of the stable. Neither side exceeded the emission limit, which is 3.6 kg NH3 ks-1 rok-1. In the first stop at the pond, the average temperature was 19.2 ° C, the average humidity was 58.5 % and the average ammonia concentration was 3.9337 mg.m-3. The total mortality under these conditions was 122 pieces. On the side of the road, the average temperature was 19.8 ° C, the average relative humidity was 61.3 % and the average ammonia concentration was 3.4398 mg.m-3. Under these conditions, the death of 148 pigs was found. In the second stop, the average temperature on the side of the pond was 20.3 ° C, the average relative humidity was 66.88 % and the average ammonia concentration was 3.8057 mg.m-3. The total death on the side of the pond was 64 pigs. On the road side, the average temperature was 20.9 ° C, the average relative humidity was 67.62 % and the average ammonia concentration was 3.3196 mg.m-3. The total death on the side of the road was 94 pigs. The results show that pigs in breeding thrive more in the summer months (second stop) in the part of the pond. This is most likely due to the higher temperature around 20.5 ° C and the relative humidity around 67 %. In the second stop, the mortality is 59 % lower than in conditions with lower temperature and relative humidity. The company should take from these data that a wetter and warmer environment is more favorable for pig farming. With respect to this knowledge, he will have more than half as efficient breeding. The specific production of ammonia and the concentration of ammonia in the air are very burdensome for the environment, and therefore limit values are issued, according to which every company should follow. In the case of the Mazelov plant, these values were not exceeded.
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