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Table 1 Interactive effect of nitrogen and potassium on leaf dry mass, leaf area, chlorophyll content, nitrogen content (Na) and potassium content (Ka)

From: Interactive effects of nitrogen and potassium on photosynthesis and photosynthetic nitrogen allocation of rice leaves

Treatments Leaf dry mass g plant−1 Leaf area cm2 plant− 1 Chlorophyll mg m− 2 Na g m− 2 Ka g m− 2
N0 K0 3.16 ± 0.18 bCa 602 ± 36 cB 146.9 ± 1.5 aB 1.14 ± 0.02 aC 1.05 ± 0.05 bA
K120 4.52 ± 0.11 aC 859 ± 47 bC 125.2 ± 8.9 bB 1.02 ± 0.01 bC 1.10 ± 0.01 bA
K180 4.86 ± 0.15 aB 942 ± 48 aB 118.1 ± 1.3 bB 1.01 ± 0.03 bC 1.17 ± 0.01 aA
N180 K0 5.04 ± 0.18 bB 1114 ± 65 cA 155.6 ± 6.1 aB 1.34 ± 0.04 aB 0.88 ± 0.02 cB
K120 5.85 ± 0.17 aB 1297 ± 77 bB 143.6 ± 5.9 abA 1.27 ± 0.03 bB 0.96 ± 0.02 bB
K180 6.11 ± 0.22 aA 1553 ± 132 aA 140.4 ± 6.4 bA 1.25 ± 0.10 bB 1.06 ± 0.04 aB
N270 K0 8.06 ± 0.21 bA 1220 ± 145 bA 175.8 ± 3.7 aA 1.45 ± 0.05 aA 0.77 ± 0.02 cC
K120 8.80 ± 0.28 aA 1708 ± 72 aA 144.1 ± 2.8 bA 1.41 ± 0.02 abA 0.91 ± 0.01 bC
K180 8.69 ± 0.39 abA 1660 ± 97 aA 141.5 ± 13.5 bA 1.36 ± 0.02 bA 0.99 ± 0.02 aC
N **b ** ** ** **
K ** ** ** ** **
N × K *c ** * * *
  1. a Different small letters were used to show the significant differences between three K rates of the same N rate. Different large letters were used to show the significant differences between three N rates of the same K rate
  2. b ** means significant difference at P ≤ 0.01
  3. c * means significant difference at P ≤ 0.05, ns means no significant difference