Table 7: Interactive effects of UV-B radiation and nitrogen on Fe concentration (μg g−1) and Fe acquired (mg m−2) by above-ground organs of maize.

NitrogenRadiationSilkingMaturity
LcScLaSaLcScGcLaSaGa

N0UV321.551.5 a49.614.8 a402.0182.028.566.4112.219.1 a
C362.070.0 a60.823.8 a1029.3300.018.3204.7184.815.6 a
Mean341.860.855.219.3 B715.6241.023.4135.5148.517.4 C

N1UV367.0102.0 a54.835.4 a363.3228.025.770.5155.123.4 a
C360.758.3 b75.231.0 a445.0154.320.7108.9150.525.7 a
Mean363.880.265.033.2 A404.2191.223.289.7152.824.6 B

N2UV301.559.5 b50.223.2 b392.5315.529.586.3238.329.9 b
C397.3101.3 a95.064.4 a448.7157.729.3133.8171.543.1 a
Mean349.480.472.643.8 A420.6236.629.4110.1204.936.5 A

N3UV375.084.7 a73.138.8 a504.3281.726.0119.1231.328.9 b
C289.348.0 b79.730.6 a471.0194.333.0156.1230.855.1 a
Mean332.266.376.434.7 A487.7238.029.5137.6231.042.0 A

MeanUV347.278.258.3 b29.9419.2252.427.187.4 b186.025.5 b
C352.369.477.7 a37.4598.5201.625.3150.9 a184.434.9 a

ANOVA

Radiation (R)nsns * nsnsnsns * ns **
Nitrogen (N)nsnsns+nsnsnsnsns ***
R × Nns * ns * nsnsnsnsns *

Lc: leaf concentration; Sc: stem concentration; La: amount on leaves; Sa: amount on stems; Gc: grain concentration; Ga: amount on grains; UV: high UV-B treatment; C: ambient UV-B treatment; N0, N1, N2, N3: 0, 100, 200, and 300 kg N ha−1.
Means within each N level followed by the same letter (capital letters for N effects within each column) were not significantly different at 𝑃 < 0 . 1 0 . Significance of main effects: ns: not significant, + 𝑃 < 0 . 1 , * 𝑃 < 0 . 0 5 , ** 𝑃 < 0 . 0 1 , *** 𝑃 < 0 . 0 0 1 .