Table 2 The nutrient content of D. moldavica in response to the different NH4+:NO3− ratios.

From: The effect of different ammonium to nitrate ratios on antioxidant activity, morpho-physiological and phytochemical traits of Moldavian balm (Dracocephalum moldavica)

NH4+:NO3− ratios

Nutrient content (%)

DM

N

P

K

Ca

Mg

100:0*

–

–

–

–

–

–

75:25

97.80 ± 0.50a

2.00 ± 0.11d

1.69 ± 0.03a

4.00 ± 0.14a

1.04 ± 0.02c

0.84 ± 0.01c

50:50

97.70 ± 0.40a

2.52 ± 0.26c

0.79 ± 0.03b

3.57 ± 0.06c

1.56 ± 0.08a

1.20 ± 0.02b

25:75

97.50 ± 0.40a

4.06 ± 0.15a

0.71 ± 0.01c

3.65 ± 0.09bc

1.64 ± 0.07a

1.39 ± 0.07a

0:100

96.90 ± 0.30a

3.01 ± 0.09b

0.52 ± 0.02d

3.79 ± 0.10b

1.40 ± 0.02b

1.27 ± 0.08b

  1. *The plants of 100 NH4+:0 NO3− treatment was destroyed in mid-growth stages, due to ammonium toxicity.
  2. DM Dry matter.
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