Figure 2
Maximum 25OHD levels are achieved by dietary VitD3 supplementation and sunlight exposure. Boxplots of serum 25OHD levels in calves within each group at time T6, T7 and T9. Differences between groups were calculated by a 2 × 2 factorial design as described in the material and methods section. Dots represent outlier values. *p < 0.05, **p < 0.01, ***p < 0.001, ns not significant. Ctl-In (n = 11), VitD-In (n = 12), Ctl-Out (n = 11) and VitD-Out (n = 10).
