scholarly journals Relationships between milk urea and production and fertility traits in Holstein dairy herds in the Czech Republic

2009 ◽  
Vol 54 (No. 5) ◽  
pp. 193-200 ◽  
Author(s):  
D. Řehák ◽  
R. Rajmon ◽  
M. Kubešová ◽  
M. Štípková ◽  
J. Volek ◽  
...  
Keyword(s):  
Czech Republic ◽  
Dairy Herd ◽  
Mixed Linear Model ◽  
Dairy Herds ◽  
Successful Pregnancy ◽  
The Czech Republic ◽  
Breeding Date ◽  
Pregnancy Status ◽  
Milk Urea ◽  
Fertility Traits

The objective of this study was to determine how the concentration of milk urea (MU) and FPCM production affect reproduction in selected Holstein dairy herds in the Czech Republic. A retrospective, observational study comprising analyses of individual cow records from monthly dairy herd improvement (DHI) milk tests including milk urea (MU) concentration was conducted in six commercial Holstein dairy herds in cows that were bred from July 2000 to August 2003. A total of 1 333 cows with available breeding date, pregnancy status, and calving to first service interval from 31 to 150 days were selected. The data were evaluated using the mixed linear model and logistic analyses. The effect of MU concentration on the probability of conception at first service was not significant (<i>P</i> = 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 (<i>P</i> < 0.05) and FPCM (<i>P</i> < 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%).

scholarly journals Effect of herd, parity, stage of lactation and milk yield on urea concentration in milk

2011 ◽  
Vol 51 (No. 12) ◽  
pp. 510-517 ◽  
Author(s):  
F. Jílek ◽  
D. Řehák ◽  
J. Volek ◽  
M. Štípková ◽  
E. Němcová ◽  
...  
Keyword(s):  
Milk Yield ◽  
Repeated Measures ◽  
Milk Fat ◽  
Dairy Herd ◽  
Mixed Linear Model ◽  
Urea Concentration ◽  
Dairy Herds ◽  
Nutritional Factors ◽  
Stage Of Lactation ◽  
Milk Urea

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. Higher concentrations of milk urea were determined in the cows on the first and second parity (5.63 and 5.62 mmol/l, respectively) compared to the groups of cows on the third and fourth parity (5.47 mmol/l). It was found that milk urea concentration increased with the square of milk yield (P &lt; 0.0001), while a negative quadratic relationship was found between milk urea concentration and milk fat % (P &lt; 0.0001). It was concluded that milk urea concentration should be evaluated in association with days in milk, milk yield, milk fat %, and milk protein %. &nbsp;

scholarly journals First evaluation of growth parameters in clonal test with wild cherry

2008 ◽  
Vol 53 (No. 2) ◽  
pp. 57-65 ◽  
Author(s):  
M. Hajnala ◽  
M. Lstibůrek ◽  
J. Kobliha
Keyword(s):  
Czech Republic ◽  
Prunus Avium ◽  
Growth Parameters ◽  
Mixed Linear Model ◽  
Future Research ◽  
Wild Cherry ◽  
The Czech Republic ◽  
Research Activities ◽  
Clonal Test ◽  
Clonal Trial

A 6-year-old clonal trial with 13 clones of wild cherry (<i>Prunus avium</i> L.) was evaluated during the summer of 2004 at 6 different sites in the Czech Republic. Observed traits were the stem height, stem diameter, health status, and mortality. The mixed linear model was implemented with either independent or the autoregressive error structure. The later provided better fit to the data. At this age, only one clone outperformed the remaining ones in volume production. Suggestions for future research activities are provided that should lead to the establishment of long-term breeding programs with wild cherry in the Czech Republic.

scholarly journals Mycobacterium avium subsp. paratuberculosis and M. a. avium detected by culture, IS900 and IS901 highly sensitive PCR in bulk tank milk from dairy herds in the Czech Republic between 2002 and 2004

2009 ◽  
Vol 27 (No. 5) ◽  
pp. 372-378 ◽  
Author(s):  
I. Slaná ◽  
M. Bartoš ◽  
P. Roubal ◽  
V. Babák ◽  
I. Pavlík
Keyword(s):  
Czech Republic ◽  
Mycobacterium Avium ◽  
Dairy Herds ◽  
Bulk Tank Milk ◽  
The Czech Republic ◽  
Milk Samples ◽  
Highly Sensitive ◽  
Bulk Tank ◽  
Cattle Farms

In this study, the possible presence was monitored of <i>Mycobacterium avium</i> subspecies <i>paratuberculosis</i> (<i>MAP</i>) and <i>Mycobacterium avium</i> subspecies <i>avium</i> (<i>MAA</i>) by means of culture examination and PCR in 251 bulk tank milk samples from dairy herds in the Czech Republic between 2002 and 2004. The detection of <i>MAP</i> and <i>MAP</i> DNA in repeatedly collected bulk tank milk (BTM) samples from the selected cattle farms (seven farms) was the second purpose of the study. By culture, <i>MAP</i> was detected in 5 (2.0%) and <i>MAP</i> DNA in 85 (33.9%) of the total of 251 BTM samples. <i>MAA</i> was detected by culture and by PCR in 1 (0.4%) of the 251 BTM samples. This study demonstrates the presence of <i>MAP</i> and <i>MAA</i> in dairy herds in the Czech Republic.

scholarly journals Relationships Between Milk Urea and Production, Nutrition, and Fertility Traits in Israeli Dairy Herds

2004 ◽  
Vol 87 (4) ◽  
pp. 1001-1011 ◽  
Author(s):  
D. Hojman ◽  
O. Kroll ◽  
G. Adin ◽  
M. Gips ◽  
B. Hanochi ◽  
...  
Keyword(s):  
Dairy Herds ◽  
Milk Urea ◽  
Fertility Traits

Social variation in size at birth and preterm delivery in the Czech Republic and Sweden, 1989-91

1998 ◽  
Vol 12 (1) ◽  
pp. 7-24 ◽  
Author(s):  
Koupilova ◽  
Vagero ◽  
Leon ◽  
Pikhart ◽  
Prikazsky ◽  
...  
Keyword(s):  
Czech Republic ◽  
Preterm Delivery ◽  
The Czech Republic ◽  
Social Variation ◽  
Size At Birth

On Geropsychology in the Czech Republic

GeroPsych ◽  
2012 ◽  
Vol 25 (3) ◽  
pp. 161-166
Author(s):  
Hana Stepankova ◽  
Eva Jarolimova ◽  
Eva Dragomirecka ◽  
Irena Sobotkova ◽  
Lenka Sulova ◽  
...  
Keyword(s):  
Czech Republic ◽  
Clinical Practice ◽  
Old Age ◽  
Cognitive Rehabilitation ◽  
The Czech Republic ◽  
Rehabilitation Research

This work provides an overview of psychology of aging and old age in the Czech Republic. Historical roots as well as recent activities are listed including clinical practice, cognitive rehabilitation, research, and the teaching of geropsychology.

Sign in / Sign up

Export Citation Format

Share Document