Feeding strategies during fresh cow period in pasture-based dairy systems: Metabolic adaptation to lactation and resumption of ovarian cyclicity in primiparous and multiparous cows
Observational analysis reveals improved metabolic adaptation and milk production in multiparous cows under specific feeding strategies.
Key Points
Confinement with TMR during the first 21 DIM enhanced metabolic adaptation, especially in multiparous cows, but showed no significant benefit for primiparous cows.
T21 multiparous cows had greater milk production during early postpartum days compared to primiparous, with improved insulin and IGF-1 concentrations observed.
Untargeted metabolomics indicated greater lipid mobilization in primiparous cows grazing from calving, highlighted by fluctuating glucose and creatinine levels.
Despite some metabolic gains, there were no differences in the resumption of ovarian cyclicity observed between the parity groups at 60 DIM.