Effect of clone selection, nitrogen supply, leaf damage and mycorrhizal fungi on stilbene and emodin production in knotweed

Table 2 Elemental content of the alcaline (pH(H₂O) = 8.00; pH(KCl) = 7.94) ash used as a substrate in the pot experiment.

Chemical composition of the pot substrate
Element	Content (ppm)
C-CO₃	1 480
P	102
Ca	32 842
Mg	1 110
K	789
Ag	< 5.6
As	67
Ba	730
Cd	< 1.2
Co	24
Cr	46
Cu	240
Hg	0.9
Ni	35
Pb	5.8
Zn	52

Majority of its particles fell in the category 10-50 μm (50%), followed by 100-2000 μm (40%).

ISSN: 1471-2229