Longevity of cows in a large scale production technology affects the drove turnover and raising economy. Another important elements in a good raising economy are reproduction and performance. The goal of the research was to find out the health conditions of cows, their reproduction and longevity. The research took place in ZOD Kolný. Milk efficiency, reproduction, health condition and selection of animals were monitored on 330 cows from race Holštýn and Česká straka in 2006-2007. Obtained data have been processed by variance analysis and correlation analysis in Microsoft Excel programme. Dairycows were stabled in a free box stable. The basic feed ration was canned roughage with a pithy supplement. We have observed teh health condition of dairycows, causes of setting cows aside, longevity, servis period, between-calving interval and efficiency. The average data were compared in the light of lactation lactation. Obtained data were also compared with records from the Czech republic. The research has found out that in a dairycow drove with average efficiency 7 584,5 kg there have been 3583 veterinary interventions executed on 270 monitored cows, but 3322 from that have been interventions related to reproduction failures. The whole number of dairycows set aside while researching was 142. The main causes of settin cows aside were the reproduction failures(13,03%) and the lacteal gland inflamations (7,8%). The age analysis has shown that only 24,2% of cows are on 4th and higher lactation. Most cows are on the 2nd lactation (100 heads). There we could see the heads descent ply down to the 8th lactation, were there are only 3 dams. The average servis period was 167,03 days. There were over 85% of dairycows with unsatisfactory servis period (over 75 days). 58,14% of dairycows got over 120 day limit. These data in comparison with the whole czech rate, where the servis period is 125,8 days, show the servis period 41,5 days longer. The average interval lenght was 42,7 days, which is 17,3 days longer than the republic average in 2006. Economical deprivation caused by the servis period prolongation were 3921,26 Kč per cow. Altough the profit with 104 Kč spending on one day was along with average milk yield 7 548,50 Kč 39 789,55 Kč per caw per year. So if a cow with an average milk eficiency (consodering it´s lactation) would live until the 7th lactation, it will earn 289 323,30 Kč in it´s whole life.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:49165 |
| Date | January 2008 |
| Creators | VOCHOZKOVÁ, Šárka |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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