Relationship between energy status and fertility in Czech Fleckvieh cows
2012
Duchacek, J., Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Specialni Zootechniky | Vacek, M., Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Specialni Zootechniky | Stadnik, L., Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Specialni Zootechniky | Beran, J., Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Specialni Zootechniky | Vodkova, Z., Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Specialni Zootechniky | Rohlikova, V., Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Specialni Zootechniky | Nejdlova, M., Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Specialni Zootechniky
The aim of this study was to confirm that a negative energy balance expressed by declining body condition score (BCS) can lead to the deterioration of fertility results of Czech Fleckvieh cows. The BCS of cows was evaluated before calving and during the first five weeks of lactation. The evaluation was based on 338 Czech Fleckvieh cows calved between the October 13th, 2009 and April 27th, 2010 at one dairy farm. Analysis of relationships between the energy balance results and fertility score expressed by the reproduction results (pregnancy rate after the first and all inseminations, the insemination interval, service period, insemination index, calving period) of the observed group were performed. The higher BCS of the Czech Fleckvieh cows before calving turned out advantageously regarding the energy source during the postpartal period. No negative effect of high BCS in cows before calving was confirmed. The best reproduction characteristics were attained in the group of cows with no change or marked increase of body condition after calving recorded. However, statistically significant differences between the groups were detected only in the third week of lactation. Significant differences in the level of body condition were detected in relation to the length and type of oestrus onset.
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