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Table 5 Comparison of secondary metabolite profile changes as influenced by applied N, P and K under different agro-climatic conditions

From: Crop-ecology and nutritional variability influence growth and secondary metabolites of Stevia rebaudiana Bertoni

Treatment Stevioside (ST) content (%) Rebaudioside -A (Rab-A) content (%) ST + Reb-A content (%) ST: Reb-A
IHBT RHRS PAU IHBT RHRS PAU IHBT RHRS PAU IHBT RHRS PAU
Nitrogen Level             
N30 9.98 ± 0.69 a 5.42 ± 0.92 a 7.21 ± 0.22 a 3.38 ± 0.22 a 2.93 ± 0.29 a 4.48 ± 0.24 a 13.37 ± 0.75 a 8.35 ± 1.11a 11.70 ± 0.40 a 3.01 ± 0.26 a 1.82 ± 0.23 a 1.63 ± 0.08 a
N60 12.68 ± 0.43 b 6.23 ± 1.13 a 8.37 ± 1.02 a 3.52 ± 0.25 a 2.37 ± 0.43 a 3.30 ± 0.48 a 16.20 ± 0.43 b 8.6 0 ± 0.92 a 11.67 ± 0.88 a 3.75 ± 0.42 a 3.33 ± 0.98 a 3.04 ± 0.75 b
N90 10.73 ± 0.69 ab 7.15 ± 0.60 a 7.00 ± 1.013 a 3.42 ± 0.30 a 2.63 ± 0.37 a 3.67 ± 0.44 a 14.15 ± 0.88 ab 9.78 ± 0.57 a 10.67 ± 1.08 a 3.24 ± 0.26 a 3.00 ± 0.46 a 2.16 ± 0.60 ab
Phosphorus Level             
P20 10.99 ± 0.67 a 6.20 ± 0.74 a 7.51 ± 0.41 a 3.46 ± 0.19 a 2.99 ± 0.28 a 3.84 ± 0.41 a 14.44 ± 0.77 a 9.19 ± 0.76 a 11.36 ± 0.35 a 3.24 ± 0.21 a 2.25 ± 0.37 a 2.41 ± 0.55 a
P40 11.28 ± 0.58 a 6.33 ± 0.78 a 7.54 ± 0.90 a 3.42 ± 0.22 a 2.3 ± 0.27 a 3.79 ± 0.31 a 14.70 ± 0.62 a 8.63 ± 0.71 a 11.33 ± 0.90 a 3.42 ± 0.33 a 3.18 ± 0.65 a 2.14 ± 0.42 a
Potassium Level             
K20 11.78 ± 0.56 a 5.58 ± 0.69 a 7.65 ± 0.87 a 3.50 ± 0.87 a 2.60 ± 0.31 a 3.27 ± 0.59 a 15.28 ± 0.62 a 8.19 ± 0.72 a 10.92 ± 0.92 a 3.40 ± 0.20 a 2.30 ± 0.40 a 2.93 ± 0.78 a
K40 11.35 ± 0.36 a 6.78 ± 1.04 a 7.58 ± 0.24 a 3.7 0 ± 0.24 a 2.57 ± 0.41 a 4.37 ± 0.18 a 15.05 ± 0.43 a 9.35 ± 0.86 a 11.95 ± 0.30 a 3.08 ± 0.12 a 3.16 ± 0.81 a 1.75 ± 0.09 a
K60 10.27 ± 1.10 a 6.43 ± 1.035 a 7.35 ± 1.23 a 3.12 ± 1.23 a 2.77 ± 0.40 a 3.82 ± 0.36 a 13.38 ± 1.17 a 9.20 ± 1.12 a 11.17 ± 1.09 a 3.51 ± 0.54 a 2.68 ± 0.77 a 2.14 ± 0.63 a
  1. The data are means ± SE (n = 6 for nitrogen; n = 9 phosphorus; n = 6 for potassium). Values with the same letter are not significantly different (P = 0.05) in the respective factors. N1, N2 and N3 are the level of nitrogen @ 30, 60 and 90 kg ha−1, respectively. P1 and P2 are the level of phosphorus (P2O5) @ 20 and 40 kg ha−1, respectively, while K1, K2 and K3 are representing the level of potassium (K2O) @ 20, 40 and 60 kg ha−1, respectively.