The aim of this thesis was to evaluated fertility and milk performance due to multiple milking technology which was used. The monitoring was carried in 2011 in farms Agrospol, Malý Bor a.s. and the farm Dub. System evaluation of fertility and milk performance of dairy cows at multiple milking were evaluated in 186 lactations of Czech pied cattle breeding. The average number of milking in the parlour was 2.96x/day and robot 2.36x/day. 107 lactations were obtained during milking in the milking parlour and 79 of lactation during milking by robots. In this thesis were measured indicators of fertility (insemination interval, service period, the mean time and age at first calving) and indicators of milk production (lactation length, the amount of milk fat, protein and lactose content). In the reproductive indicators were taken statistically highly difference in age at first calving, where the average difference was 195 days. For other indicators of fertility were all statistically significant results in favor of milking in the milking parlour (2.96x/day). Czech pied cattle milked in the milking parlour per normative lactation average amount of milk produced 8 599.8 kg, cows milked by robot 7 272.5 kg. Among these values was statistically highly significant difference. The best results in the production of milk per normative lactation were gained by milked cows in the milking parlour (9 284.4 kg) and the second lactation cows milked in the milking parlour (9 033.0 kg) on the third and more lactation. The lowest milk production in normative lactation gained dairy cows milked by robot at first lactation (6 874.7 kg). The higher average fat content had dairy cows milked in the milking parlour with a value of 4.47 %, dairy cows milked by robot had fat content of 4.15 %. Between these values was statically highly significant difference. In the average protein content in dairy cows has been demonstrated statistically significant difference. Dairy cows milked in the milking parlour reached the value 3.41 % compared to cows milked by a robot, where the average value of protein was 3.47 %. The difference in lactose content between groups was not statistically significant.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:137039 |
| Date | January 2012 |
| Creators | TRCH, Jan |
| 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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