Milk urea concentration as a predictor of reproductive performance in dairy cows?
|Kateg. publikace||Články v odborných časopisech|
The aims of this study were to evaluate the relationship between milk urea concentration (MU) and fertility in dairy cows and to investigate the potential for using body condition score (BCS) in combination with MU as an indicator for monitoring animals’ energy status. Two commercial farms were chosen, one with Holsteins and a second with dual-purpose Czech Fleckvieh cattle. The multifactorial analysis of variance was performed using CORR and GLM procedures in software SAS 8.1. MU had only minimal relationship with reproduction indexes. In the Czech Fleckvieh cows it was related only to length of calving interval (CI), and in Holsteins to the number of inseminations per conception. The results were inconsistent between the two cases: in Fleckvieh the cows with lowest MU had the longest CI, while in Holsteins a higher number of inseminations per conception was associated with the middle level of MU. Inconsistent results were obtained also in the case of MU at conception. In the Fleckviehs, the shortest days open and CI were observed in the group of cows with the lowest MU. In Holsteins, on the other hand, the most favourable reproduction parameters were observed for the group with the highest MU.
|Projekt||Využití genetických a negenetických faktorů ke zvýšení výkonnosti dojených plemen skotu v ČR, Udržitelný rozvoj chovu hospodářských zvířat v evropském modelu multifunkčního zemědělství|
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