. . "54" . . "Volek, Jaroslav" . "RIV/60460709:41210/09:54022!RIV12-MZE-41210___" . "Relationships between milk urea and production and fertility traits in Holstein dairy herds in the Czech Republic"@en . "dairy cow, reproduction, probability of conception"@en . "338807" . . "000266898000001" . "Czech Journal of Animal Science" . "6"^^ . . "1212-1819" . . . "\u0158eh\u00E1k, Dalibor" . "Relationships between milk urea and production and fertility traits in Holstein dairy herds in the Czech Republic" . . . "J\u00EDlek, Franti\u0161ek" . "Kube\u0161ov\u00E1, Marta" . . "Relationships between milk urea and production and fertility traits in Holstein dairy herds in the Czech Republic"@en . "Relationships between milk urea and production and fertility traits in Holstein dairy herds in the Czech Republic" . "CZ - \u010Cesk\u00E1 republika" . . "2"^^ . . "[50D06D8F8226]" . . "P(1G46086), Z(MSM6046070901)" . . "5" . "The study comprising analyses of individual cow records from monthly dairy herd improvement (DHI) milk was conducted in six Holstein dairy herds. A total of 1 333 cows with calving to first service interval from 31 to 150 days were selected. The effect of MU concentration on the probability of conception at first service was not significant (P = 0.11). The results indicated a nonlinear relationship between MU concentration and the probability of conception. A significant effect of the length of calving to first service interval (P < 0.05) and FPCM (P < 0.05) was determined. The cows with the calving to first service interval longer than 2 months had higher probability of conception (10% higher). In the group with the highest FPCM a markedly lower level of successful pregnancy was determined (38.99%), which significantly differed from the group with average FPCM production (48.53%). The probability of conception at first service in the group with the lowest FPCM is at an average level (43.55%)." . "Rajmon, Radko" . . "\u0160t\u00EDpkov\u00E1, Miloslava" . . "RIV/60460709:41210/09:54022" . "The study comprising analyses of individual cow records from monthly dairy herd improvement (DHI) milk was conducted in six Holstein dairy herds. A total of 1 333 cows with calving to first service interval from 31 to 150 days were selected. The effect of MU concentration on the probability of conception at first service was not significant (P = 0.11). The results indicated a nonlinear relationship between MU concentration and the probability of conception. A significant effect of the length of calving to first service interval (P < 0.05) and FPCM (P < 0.05) was determined. The cows with the calving to first service interval longer than 2 months had higher probability of conception (10% higher). In the group with the highest FPCM a markedly lower level of successful pregnancy was determined (38.99%), which significantly differed from the group with average FPCM production (48.53%). The probability of conception at first service in the group with the lowest FPCM is at an average level (43.55%)."@en . . . "8"^^ . "41210" .