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(A) Mean serum concentrations (± SE) of retinol, (B) α-tocopherol and (C) β-carotene in HF and JB cows pastured during the daytime from November 2013 to October 2014. Values with different letters are significantly different (A–B, C–D, E–F; P<0.05) and (a–b, c–d, e–f, g–h, i–j, k–l; P<0.05) for HF and JB cows, respectively. *, **, *** Significantly differs from the value in JB cows within a sampling period at P<0.05, P<0.01 and P<0.001, respectively.
