The aim of this thesis was to evaluate the influence of lameness of Holstein breed milk cows on their dairy yield. The experiment took place in the farm Žabčice. The observation was carried out from July 2015 to January 2016. Cows were rated on a scale from 1 (no limping symptoms) to 5 (severe lameness). The milk yield , the fat and protein content and lactose were monitored. The phase and number of lactation cycles were considered as well. Analysis of gathering data shows that cows rated as 1 or 2 on the scale of lameness had a higher average milk yield (28.28 kg or 30.47 kg) and a lower number of lactation (2.26 resp. 2.55) than cows rated 3 or higher. Furthermore was found out that cows in the early phase of lactation cycle, 1 - 99 days or 100 - 199 days were rated lower on the scale of lameness (2.34 resp. 2.37) than cows in late phase of lactation 300 < (2.67). All aforementioned results were proven as highly statistically significant (p > 0.01). The expected influence of lameness on contend of compounds in milk was not proven. (p > 0.05).
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:362449 |
| Date | January 2016 |
| Creators | Přikrylová, Monika |
| 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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