Table 2. Correlation analysis of element concentrations.

	P	S	C	N	K	Mg	Ca	Fe	Zn	Mn	Al
P		0.505	-0.504	-0.443	0.266	0.257	0.465	0.147	-0.290	-0.008	-0.055
S	0.094		-0.052	0.393	0.885	0.911	0.855	-0.136	0.191	0.148	-0.213
C	0.095	0.873		0.397	0.163	-0.103	-0.128	-0.842	0.260	-0.637	-0.742
N	0.150	0.206	0.201		0.534	0.643	0.519	-0.260	0.779	0.256	-0.240
K	0.404	0.000	0.614	0.074		0.888	0.743	-0.207	0.231	0.195	-0.201
Mg	0.420	0.000	0.751	0.024	0.000		0.881	0.029	0.417	0.424	-0.022
Ca	0.128	0.000	0.692	0.084	0.006	0.000		-0.124	0.558	0.188	-0.252
Fe	0.648	0.673	0.001	0.415	0.518	0.928	0.701		-0.297	0.838	0.939
Zn	0.361	0.553	0.414	0.003	0.470	0.178	0.060	0.349		0.069	-0.309
Mn	0.979	0.647	0.026	0.422	0.544	0.169	0.559	0.001	0.832		0.804
Al	0.866	0.505	0.006	0.453	0.531	0.947	0.429	0.000	0.328	0.002

Data for concentrations in leaves, stem, coarse and fine roots (see Fig 1) were used and p-values (lower diagonal) and the Pearson’s correlation coefficient r (upper diagonal) of correlation are shown. Correlations with p ≤ 0.05 are indicated in bold.