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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Analýza fázové výživy dojnic v daném zemědělském podniku
 VONA, Barbora
The thesis deals with the analysis of the phase feeding in herds of Holstein cattle in specific operating conditions and its relation to milk yield and health of dairy cows. In the reference event to be optimized ration drystanding cows and lactating cows in comparison protocols laboratory analysis of mixed rations to standard NRC by the enterprise uses for compiling rations. The thesis was evaluated the effect of ration on milk yield and content of milk components and also affect the incidence of metabolic disorders. The aim of the thesis was to analyze the phase nutrition of dairy cows in the reporting company in relation to milk production and health, to evaluace the quality of feed rations, some feed and feeding technique. It was found that the monitored parameters do not match any breed mixed rations used in the standard, which could lead to reduced levels of production and reproduction and deterioration in health of dairy cows. It was further found that in the observed rearing occur very frequent occurrence of metabolic disturbances and fluctuations in the milk production.
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Analysis of milk production and fertility in dairy herd of Holstein cattle
 VONA, Barbora
Bachelor thesis analyzes the milk yield and fertility of dairy cows in a herd of Holsteins and the factors that influence these indicators. Reproductive disorders and problems with fertilisation osten occur in breeding of high-yield dairy cows resulting in economic loss in milk production. The aim of this thesis was to evaluate selected impacts on milk production and reproduction at the level of the selected file. Evaluated the effects were genotype and age at first calving. Another significant outcome of this thesis was to assess whether a selected group of Holstein cows meets the requirements of selected breeding goal Holsteins. Analysis of selected data held in the company DZV Nova as, on a farm VKK Petrovice. Selected cows were divided into groups based on genotype and age at first calving. For testing the effect of genotype showed a statistically significant difference (p <0.05) in milk yield between genotypes. Furthermore, a statistically significant difference (p <0.05) between reproductive indicators, both between lactations, and in the case of insemination interval also the overall result. For further tested the effects were not statistically significant differences between the groups, but the resulting data is valuable to the zootechnical.
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