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Table 1 Effects of ammonium: nitrate on leaf area, canopy spread, leaf number, fresh weight, dry weight and total chlorophyll content in mini Chinese cabbage under normal (200 μmol m−2 s−1) and low (100 μmol m−2 s−1) light conditions

From: Appropriate NH4 +: NO3 ratio improves low light tolerance of mini Chinese cabbage seedlings

Light fluence NH4 +:NO3 Leaf area (cm2 plant−1) Canopy spread (cm2 plant−1) Leaf number (# plant-1) Fresh weight (g plant−1) Dry weight (g plant−1) Chlorophyll (SPAD)
Normal light fluence 0:100 66.86 ± 3.46 ba 94.55 ± 1.83 c 5.27 ± 0.10 a 4.409 ± 0.147 c 1.153 ± 0.014 c 21.27 ± 0.58 b
10:90 68.72 ± 4.93 b 113.06 ± 1.15 b 5.43 ± 0.09 a 6.696 ± 0.079 ab 1.638 ± 0.012 b 25.57 ± 0.33 a
15:85 89.44 ± 4.71 a 123.38 ± 1.25 a 5.47 ± 0.10 a 7.842 ± 0.308 a 1.994 ± 0.043 a 28.43 ± 0.61 a
25:75 88.71 ± 1.72 a 111.95 ± 3.29 b 5.40 ± 0.10 a 6.582 ± 0.413 b 1.604 ± 0.033 b 26.93 ± 1.26 a
Low light fluence 0:100 48.24 ± 1.43 b 57.16 ± 1.24 bc 5.00 ± 0.07 a 2.243 ± 0.078 bc 0.617 ± 0.009 bc 23.87 ± 0.50 c
10:90 58.08 ± 2.64 a 65.65 ± 1.64 a 5.13 ± 0.06 a 3.497 ± 0.080 a 0.842 ± 0.022 a 28.63 ± 0.68 a
15:85 54.95 ± 1.71 ab 63.21 ± 1.12 ab 4.93 ± 0.08 a 2.502 ± 0.065 b 0.672 ± 0.033 b 26.87 ± 0.18 ab
25:75 48.64 ± 1.13 b 55.56 ± 1.64 c 4.83 ± 0.12 a 1.991 ± 0.068 c 0.553 ± 0.013 c 25.90 ± 0.50 bc
  1. aData are expressed as means ± SE (n = 3 with 20 plants per replication). Means followed by the different letters are significantly different according to Tukey’s test (P < 0.05), in each of the two light conditions