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Vliv různých typů podestýlky na parametry mléčné užitkovosti dojnic holštýnského skotu ve vybraných chovech
Maňáková, Michaela
The aim of this diploma thesis was based on analyze and following synthesis evaluated the effect of different types of bedding on milk performance parameters dairy cows of Holstein cattle. The experiment was carried out during one calendar year (February 2017 to January 2018). The monitoring was carried out once a month, one day after performance check in three selected farms – Company A (Farma Zdeňka), Company B (ZOD Lešná), Company C (ŠZP NJ). In the companies was used high bed with manure separation and ground limestone, a high bed covered with straw, deep bed with a sandwich of the first type with a layer of separating manure and ground limestone and deep bedding. Between milk performance parameters were included data of the order of lactation (n), days in milk (n), milk production (kg), content of fat (%), content of protein (%), number of somatic cells in thousands in 1 ml (PSB in thousands/ml). At the same time was determined the air temperature (° C). The results shows that the best type of housing cows was housing with deep bed with with a sandwich of the first type with a layer of separating manure and ground limestone according to number of somatic cells in the milk (145,6 thousand/ml) and the occurrence of mastitis (2,9%), as well as the milk production (36,9 kg) and the milk components content (3,9% fat and 3,4% proteins). The highest number of somatic cells (company B 419,3 thousand/ml and company C 378,9 thousand/ml) and the highest percentage of clinical mastitis (7,7% in company B and 5,7% in company C) were achieved dairy cows housing on high beds with a separation manure at companies B and C.
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Analýza příčin brakace dojnic holštýnského skotu ve vybraném chovu
Maňáková, Michaela
This bachelor thesis deals with the most common reasons of culling dairy cows of holstein cattle from selected breeding. Monitoring was carried out in three selected farms: Farm Zdeňka, ZOD Lešná with site of milk production on farm Perná and in company of University of Veterinary and Pharmaceutical Sciences - School Farm Nový Jičín with site of milk production on farm Kunín during the year 2015. The priority in breeding dairy cows is to keep good health because good health belongs among main conditions of economically succesful milk production. This bachelor thesis was compiled from the detailed data about 465 dairy cows culling from different breeding. Among the most common reasons of culling dairy cows belongs disorder of the reproduction (30,06 %), problems with limbs (22,35 %) and mastitis (10,59 %) but the least of cows was culling for high age (0,58 %). The total percentage of culling cows should be econimically about 30 %, but average of all breeding significantly exceeded even by 5,56 %. Below this percentage is only ZOD Lešná with total culling rate 29,75 %. Achieving and maintenance of good health and improve the key indicators of reproduction and health are important for profitability of breeding.
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