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Table 2 Chemical composition of the substrates and fertilizers used in the experiment

From: Factors influencing the production of stilbenes by the knotweed, Reynoutria × bohemica

Substrate pH(H2O) pH(KCl) Conductivity N C P K Ca Mg Na
    μS % % ppm ppm ppm ppm ppm
Clay 7.26 7.12 718 0.08 5.60 20.4 693 2651 527 411
Loess 8.22 7.57 404 0.26 1.59 10.5 823 8172 1088 1506
Compost 6.97 6.92 395 2.18 17.58 652 7314 11118 2536 2296
Conavit 7.96 7.73 1354 2.45 9.16 65.5 18550 1536 640 3839
Symbivit 7.99 7.65 688 0.23 1.14 10.2 7483 360 158 2230
  1. N, C - total (Carlo-Erba CHN analyzer); P (Olsen); K, Ca, Mg and Na - Mehlich II extracts.