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Table 3 Effect of different levels N, P and K on yield (t ha −1 ) and harvest index (HI) of stevia under different experimental locations

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

Treatment Dry leaf yield (t ha −1 ) Dry stem yield (t ha −1 ) Harvest Index (HI)
CSIR-IHBT RHRS PAU CSIR-IHBT RHRS PAU CSIR-IHBT RHRS PAU
2010 2011 2010 2011 2010 2011 2010 2011 2010 2011 2010 2011 2010 2011 2010 2011 2010 2011
Nitrogen Level                   
N 30 1.24 1.34 0.79 0.91 0.39 0.6 1.83 1.99 1.42 1.43 0.78 1.19 0.41 0.42 0.36 0.39 0.34 0.33
N 60 1.56 1.69 0.93 1.04 0.52 0.81 2.19 2.48 1.47 1.56 0.76 1.47 0.42 0.41 0.39 0.4 0.4 0.35
N 90 1.69 1.91 1.03 1.19 0.53 0.83 2.35 2.65 1.56 1.69 0.74 1.53 0.42 0.42 0.39 0.41 0.41 0.35
SEm(±) 0.04 0.03 0.03 0.02 0.02 0.04 0.04 0.05 0.03 0.03 0.03 0.08 0.007 0.004 0.009 0.007 0.007 0.011
CD(P = 0.05) 0.10 0.09 0.08 0.06 0.05 0.13 0.12 0.14 0.08 0.08 NS 0.22 NS NS 0.025 NS 0.021 NS
Phosphorus Level                   
P 20 1.44 1.55 0.87 1.01 0.47 0.68 1.94 2.22 1.48 1.55 0.73 1.35 0.42 0.41 0.37 0.39 0.39 0.34
P 40 1.55 1.74 0.98 1.08 0.48 0.8 2.3 2.52 1.49 1.56 0.79 1.45 0.4 0.41 0.39 0.41 0.38 0.35
SEm (±) 0.03 0.03 0.02 0.02 0.01 0.04 0.03 0.04 0.02 0.02 0.03 0.06 0.006 0.003 0.007 0.006 0.006 0.009
CD(P = 0.05) 0.08 0.07 0.06 0.05 NS 0.11 0.10 0.12 NS NS NS NS 0.016 NS 0.020 0.016 NS NS
Potassium Level                   
K 20 1.38 1.51 0.84 0.99 0.47 0.74 1.91 2.20 1.49 1.53 0.75 1.31 0.41 0.41 0.37 0.39 0.38 0.36
K 40 1.62 1.74 0.98 1.08 0.49 0.76 2.11 2.44 1.52 1.59 0.77 1.48 0.43 0.42 0.39 0.4 0.38 0.34
K 60 1.50 1.69 0.95 1.07 0.49 0.73 2.34 2.48 1.54 1.56 0.76 1.41 0.39 0.41 0.38 0.4 0.39 0.34
SEm (±) 0.04 0.03 0.03 0.02 0.02 0.04 0.04 0.05 0.03 0.03 0.03 0.08 0.007 0.004 0.009 0.007 0.007 0.011
CD(P = 0.05) 0.10 0.09 0.08 0.06 NS NS 0.12 0.14 0.08 NS NS NS 0.02 NS NS NS NS NS
Interaction effect                   
CD of N × P NS NS NS NS NS NS 0.16 0.20 NS NS NS NS NS NS NS NS NS NS
CD of N × K 0.18 0.16 NS NS NS NS 0.20 NS NS NS NS NS 0.04 NS NS NS NS NS
CD of P × K NS NS NS NS NS NS 0.16 NS NS NS NS NS 0.03 NS NS NS NS NS
CD of N × P × K NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS
  1. 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.