| Attributes | Values |
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| rdf:type
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| Description
| - Cílem této práce bylo určit, jakým způsobem ovlivňují nenutriční faktory, tedy stádo, parita, dny laktace, mléčná užitkovost a složky mléka koncentraci močoviny v mléce. Byla provedena retrospektivní observační studie zahrnující analýzy záznamů jednotlivých krav pomocí DHI testu včetně testu na močovinu v mléce. Do průzkumu byly zařazeny údaje z let 2000- 2003 o 6 stádech dojnic z běžného zemědělského provozu. Data byla hodnocena pomocí smíšeného lineárního modelu s opakovaným měřením, přičemž parametry byly odhadovány pomocí metody REML. U koncentrací močoviny v mléce byly mezi stády signifikantní rozdíly, variabilita mezi testovanými údaji v rámci stád byla rovněž průkazná. Signifikantní byly také vlivy parity (P=0,0003), dnů laktace (P lt;0,0001) a jejich interakcí. Vyšší koncentrace močoviny v mléce měly prvorodičky a druhorodičky (5,63 resp. 5,62 mmol/l) v porovnání se skupinami krav rodících potřetí nebo počtvrté (5,47 mmol/l). (cs)
- The objective of this study was to determine how non-nutritional factors such as herd, parity, days in milk, milk production, and milk components affect the concentration of milk urea. A retrospective, observational study comprising analyses of individual cow records from monthly dairy herd improvement milk tests including milk urea tests was conducted. Six commercial Holstein dairy herds were involved in the investigation from October 2000 to September 2003. The data were evaluated using the mixed linear model with repeated measures, and parameters were estimated by the REML method. Significant differences in milk urea concentrations were observed between herds (P lt; 0.0001), with a significant variability between test dates within herds. Significant effects of parity (P = 0.0003), days in milk (P lt; 0.0001), and their interaction were also found.
- The objective of this study was to determine how non-nutritional factors such as herd, parity, days in milk, milk production, and milk components affect the concentration of milk urea. A retrospective, observational study comprising analyses of individual cow records from monthly dairy herd improvement milk tests including milk urea tests was conducted. Six commercial Holstein dairy herds were involved in the investigation from October 2000 to September 2003. The data were evaluated using the mixed linear model with repeated measures, and parameters were estimated by the REML method. Significant differences in milk urea concentrations were observed between herds (P lt; 0.0001), with a significant variability between test dates within herds. Significant effects of parity (P = 0.0003), days in milk (P lt; 0.0001), and their interaction were also found. (en)
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| Title
| - Effect of herd, parity, stage of lactation and milk yield on urea concentration in milk
- Effect of herd, parity, stage of lactation and milk yield on urea concentration in milk (en)
- Vliv stáda, parity, stádia laktace a mléčné užitkovosti na koncentraci močoviny v mléce (cs)
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| skos:prefLabel
| - Effect of herd, parity, stage of lactation and milk yield on urea concentration in milk
- Effect of herd, parity, stage of lactation and milk yield on urea concentration in milk (en)
- Vliv stáda, parity, stádia laktace a mléčné užitkovosti na koncentraci močoviny v mléce (cs)
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| skos:notation
| - RIV/00027014:_____/06:#0000317!RIV07-MZE-00027014
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| http://linked.open.../vavai/riv/strany
| |
| http://linked.open...avai/riv/aktivita
| |
| http://linked.open...avai/riv/aktivity
| - P(1G46086), Z(MSM6046070901)
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
| |
| http://linked.open...ai/riv/idVysledku
| - RIV/00027014:_____/06:#0000317
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| http://linked.open...riv/jazykVysledku
| |
| http://linked.open.../riv/klicovaSlova
| - dairy cow, milk urea, non-nutritional factors (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
| |
| http://linked.open...i/riv/nazevZdroje
| - Czech Journal of Animal Science
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| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
| |
| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...vavai/riv/projekt
| |
| http://linked.open...UplatneniVysledku
| |
| http://linked.open...iv/tvurceVysledku
| - Němcová, Eva
- Řehák, Dalibor
- Štípková, Miloslava
- Volek, Jaroslav
- Fiedlerová, Markéta
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| http://linked.open...n/vavai/riv/zamer
| |
| issn
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| number of pages
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| is http://linked.open...avai/riv/vysledek
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