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Table 1 Nitrate, ammonium, and phosphate contents in soil before and after experiment (average ± 1 SD; before, n = 2; after, n = 4)

From: Effects of water levels and soil nutrients on the growth of Iris laevigata seedlings

Soil nutrient level Treatment NO3-N (mg/kg) NH4-N (mg/kg) PO4-P (mg/kg)
Low (L) Before 1.35 ± 0.05 0.40 ± 0.06 4.46 ± 0.13
After − 10 cm 0.15 ± 0.02 0.54 ± 0.09 4.22 ± 0.22
0 cm 0.13 ± 0.02 0.60 ± 0.08 3.62 ± 0.29
+ 10 cm 0.17 ± 0.04 0.80 ± 0.10 3.83 ± 0.37
Medium (M) Before 23.92 ± 2.25 33.38 ± 1.64 24.31 ± 0.89
After − 10 cm 0.27 ± 0.04 1.91 ± 0.63 19.29 ± 2.49
0 cm 0.17 ± 0.01 1.41 ± 0.26 19.60 ± 1.48
+ 10 cm 0.26 ± 0.05 3.37 ± 1.75 20.97 ± 1.54
High (H) Before 60.87 ± 1.98 96.80 ± 3.70 56.94 ± 1.00
After − 10 cm 0.94 ± 0.56 20.09 ± 6.50 39.47 ± 4.24
0 cm 0.36 ± 0.23 16.81 ± 4.69 34.85 ± 0.99
+ 10 cm 0.55 ± 0.35 26.64 ± 3.40 32. 77 ± 8.59