Table 6: Average values of the heavy metals content of the growing media used (at transplant).

Growing mediummg kg−1
PbCdNiZnCuCr+6

Italian Law value1401.50100500230<0.5

SSC012.04c0.06b1.58c12c13b<0.5
SSC2533.23b0.19a1.78c82b13b<0.5
SSC4034.00b0.22a2.56b102ab15ab<0.5
SSC5535.66b0.28a3.33ab122a19a<0.5
SSC7047.49a0.31a4.13a143a18a<0.5
Significance*********n.s.

Data are mean values, .
In each column different letters indicate significant differences for (test S.N.K.).
indicates difference at ; indicates difference at ; n.s. indicates nonsignificant difference.