Konditionsbeurteilung per Ultraschall in der Herdenbetreuung

Zusammenfassung

In der Frühlaktation stehen Milchleistung und Reproduktion energetisch gesehen in einer Konkurrenzsituation. Neben der Milchproduktion ist die Puerperalphase mit Rückbildung und Reinigung des Uterus ebenso zu bewältigen wie das Wiederanlaufen der Ovartätigkeit und nach Besamung die erneute Konzeption. In dieser Arbeit werden die Wechselwirkungen zwischen dem Konditionsverlauf und verschiedenen Fruchtbarkeitsparametern dargestellt. Mit zunehmendem Energiedefizit in der Frühlaktation steigen Rast-, Güst- und Zwischenkalbezeiten kontinuierlich an. Gleichzeitig verschiebt sich der Vorzeichenwechsel in der Energiebilanz mit Verschlechterung der Fruchtbarkeitswerte zeitlich nach hinten. Um gute Reproduktionsergebnisse zu erreichen, sollte die Kondition im Herdenmittel nicht unter 13 mm Rückenfettdicke fallen.

Summary

In early lactation milk yield and fertility are competitive concerning their energy demands. Besides producing milk the cow has to cope with the involution and regeneration of the uterus. Furthermore the reinitiation of cyclic ovarian activity and a new conception have to be realized. In this essay some descriptors of fertility were related to the development of body condition in course of lactation. Intervals to first artificial insemination and to conception as well as calving intervals extend with an increasing energy deficit in early lactation. At the same time the return to a positive energy balance is slipping into later lactation with a worsening of the reproductive indices. To achieve profitable reproductive performance, conditional nadir should not decline below 13 mm backfat thickness on herd average.

Schlüsselwörter

Milchrind - Körperkondition - Rückenfettdicke - Fruchtbarkeit - Herdenmanagement

Keywords

Dairy cattle - Body condition - Backfat thickness - Fertility - Herd management

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