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. 2019 Feb 9;70(6):1969–1986. doi: 10.1093/jxb/erz044

Table 1.

Descriptive statistics and ANOVA of category I traits under low and high nitrogen fertilization levels

Trait Unit Low nitrogen fertilization High nitrogen fertilization LN/HN R 2a Variety N Variety×N
Min Max Mean Range CoV Min Max Mean Range CoV
Plant fresh mass g m–2 4032.96 5162.62 4641.06 1129.66 0.06 4742.83 5844.98 5260.78 1102.15 0.05 0.88 0.49 ***
Plant dry mass g m–2 634.78 799.51 733.41 164.73 0.05 664.85 819.94 742.26 155.09 0.05 0.99 0.48
N conc leaves % 3.40 4.01 3.64 0.61 0.04 4.04 4.91 4.38 0.87 0.05 0.83 0.49
C conc leaves % 41.84 43.37 42.73 1.53 0.01 41.42 43.99 42.83 2.57 0.01 1.00 0.42 **
CN ratio leaves 11.29 13.59 12.44 2.30 0.04 7.42 10.80 9.73 3.38 0.07 1.28 0.38
N conc stems % 1.38 1.64 1.48 0.26 0.04 1.48 2.16 1.88 0.68 0.09 0.79 0.18
C conc stems % 42.96 43.51 43.24 0.54 0.00 42.03 43.66 42.94 1.63 0.01 1.01 –0.05 ** **
CN ratio stems 27.50 32.56 30.41 5.05 0.04 20.79 29.73 24.24 8.94 0.08 1.25 0.24 **
N conc siliques % 4.54 4.93 4.75 0.39 0.02 4.71 5.41 4.98 0.70 0.03 0.95 0.16
C conc siliques % 46.68 48.12 47.52 1.44 0.01 47.05 48.39 47.81 1.34 0.01 0.99 0.09 *
CN ratio siliques 9.70 10.50 10.07 0.81 0.02 8.82 10.19 9.67 1.37 0.03 1.04 0.10
Leaves mass g 7.41 9.44 8.31 2.03 0.07 6.92 15.18 10.33 8.27 0.20 0.80 0.02 * *
Stem mass g 13.07 22.50 16.72 9.43 0.13 8.61 25.63 18.01 17.02 0.22 0.93 0.13 *
Siliques mass g 4.40 5.96 5.10 1.56 0.08 3.63 8.33 5.57 4.71 0.19 0.92 0.27 *** ** *
Leaves proportion 0.26 0.31 0.28 0.04 0.04 0.26 0.35 0.30 0.09 0.07 0.94 0.18 *** *
Stem proportion 0.52 0.58 0.56 0.06 0.03 0.47 0.58 0.54 0.11 0.05 1.03 0.37
Siliques proportion 0.14 0.20 0.16 0.05 0.07 0.14 0.19 0.16 0.05 0.09 1.03 0.44 **
Leaves N yield g 0.27 0.39 0.32 0.11 0.10 0.30 0.75 0.49 0.45 0.23 0.66 0.06 *
Stem N yield g 0.20 0.38 0.26 0.17 0.15 0.20 0.63 0.36 0.43 0.27 0.73 0.29 ** *
Siliques N yield g 0.21 0.30 0.25 0.10 0.08 0.18 0.43 0.28 0.25 0.21 0.90 0.30 *** *** *
Plant N yield g 0.75 1.02 0.84 0.27 0.10 0.72 1.66 1.13 0.94 0.21 0.74 0.19 **
Leaves C yield g 3.12 4.13 3.54 1.01 0.08 3.00 6.20 4.39 3.20 0.19 0.81 0.05 *
Stem C yield g 5.40 9.67 7.20 4.27 0.13 3.72 10.76 7.50 7.04 0.22 0.96 0.15 *
Siliques C yield g 2.06 2.83 2.42 0.78 0.08 1.73 3.95 2.67 2.21 0.19 0.91 0.24 *** ***
Plant C yield g 11.23 16.13 13.13 4.90 0.09 8.44 19.86 14.51 11.42 0.19 0.90 0.10 **
Single plant miomass g 26.22 37.12 30.03 10.90 0.09 19.21 45.64 34.01 26.43 0.19 0.88 0.05 ***
No. of plants n m–2 28.62 39.53 32.70 10.90 0.08 24.99 38.73 29.99 13.73 0.11 1.09 0.18 ***
Nup g m–2 17.47 21.19 19.62 3.72 0.04 15.39 24.42 20.27 9.03 0.11 0.97 –0.19
NutE g g–1 24.94 29.62 27.44 4.68 0.04 14.49 26.18 19.89 11.69 0.14 1.38 0.02

Mean is expressed as the arithmetic mean of all tested genotypes.

a R 2 indicates the Pearson coefficient of correlation between low and high nitrogen fertilization.

CoV, coefficient of variation.

*Significantly different from zero at the 0.5 level of probability; **significantly different from zero at the 0.1 level of probability; ***significantly different from zero at the 0.01 level of probability; †significantly different from zero at the 0.001 level of probability.