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Zvýšení produktivity práce v prostředí velkovýroby mléka v ZD Ločenice
KAMÍROVÁ, Anna
This thesis proposes three variants of the reconstruction of the collective farm in Ločenice. Each variant calculates and compares changes of the profit under certain circumstances in current business's state. It was possible to calculate the profit only for the animal sector of the business according to collected data, which is 4 987 215 CZK/year. The A variant depicts the reconstruction of the collective farm using a new robotic milking system. In addition, there is an increase in the production of milk by A a) 5 % in this variant. The profit is then 1 833 818 CZK/year higher after the increase in insvestment costs and in production. There is another increase in the production by A b) 10 % in this variant and after deducting investment costs, there is a difference 3 055 066 CZK/year from th original profit. The B variant involves a complete cancellation of dairy farming in the collective fatm in Ločenice and a transfer of production to Mokrý Lom. This reduces the number of dairy cows while requiring minimal investment. As a consequence, the profit decreases by 1 150 896 CZK/year. The last C variant offers the construction of a new production barn and milking parlour. The profit, when the production is increased by C a) 5 %, decreases by 90 353 CZK after deducting investments costs. When the production is increased by C b) 10 %, the profit increases by 2 230 498 CZK. Each variant is influenced by many factors, such as the depreciation period of individual investments, expected milk production or difficulty of operation. Each business has its specific requirements for individual factors that are decisive for choosing a concrete variant. Each of them has its pros and cons but still, in this concrete example, the most suitable is the C variant which offers on one hand the most challenging investment, but on the other hand the most sustainable option into future years.
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Vliv změny technologie dojení, ročního období a plemene na mléčnou užitkovost krav.
DÁŇOVÁ, Anna
The aim of the bachelor thesis was to evaluate the change of the milking technology, the season and the breed for dairycowsmilkproduction in the collectivefarm Budíškovice. The studywas taken place in the cowshead in Třebětice village. Collected data wereevaluated for 209 dairycows. The firstobservationexamineschanges in milking technology while the milkingparlor was renovated. Original Farmtecmilkingparlor was changed to a milkingparlorfrom Delavalfirm. During the reconstruction, the milking was taken on the temporarymilkingparlorfrom Delaval, which was builtoutside the area of cowshead. The second observation was related to the change of the season. It was found the firstamount of milkof cowswithcalf in individualmonths. The last observationwas relatedwith the cattlebreed. The companybreeds Holstein, Bohemian Pheasantbreed, Montbeliard breeds and hybrids of these breeds. The monitoring was takenunderdifferentclimaticconditions, whichcouldsignificantlyaffect the results. Based on the results obtained, it was found that all observed and other influences of the external and internal environment were significantly reflected in the performance of the cows studied.
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Psychrotrophic lipolytic bacteria and content of free fatty acids in bulk samples of cow?s raw milk
MIKULOVÁ, Magda
The objective of the study was to analyze the relationship of psychrotrophic lipolytic bacteria in bulk samples of cow?s raw milk and their metabolic activity based on the content of free fatty acids and identifying the factors that may influence their levels. The contents of free fatty acids (FFA) and counts of total bacteria, psychrotrophic lipolytic bacteria (PLiBC) and somatic cells were determined in 150 samples of cow?s bulk raw milk on 20 farms with three different milking technologies in South Bohemia during 2008?10. FFA were determined using an extraction-titration method. Within the compared technologies, the highest mean values of FFA (38,8 mmol?kg-1; P<0,001) and PLiBC (696 CFU?ml?1) were observed on farms with pipeline milking in stalls. The lowest mean FFA level (15,4 mmol?kg-1) was determined on farms with an automatic milking system. Medium values were determined on farms with parlour milking. From the aspect of the inhibition of an increase in psychrotrophic bacteria, and mainly in psychrotrophic lipolytic bacteria in conditions of cold storage of raw milk the temperature of 4°C seems optimum as it markedly inhibits the growth of mesophilic and psychrotrophic bacteria and at the same time the increase in the values of free fatty acids is slower at this temperature compared to the temperatures of 6,5 and 10°C.
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