Germination and Early Growth of Brassica juncea in Copper Mine Tailings Amended with Technosol and Compost

Table 1

Physicochemical properties and selected trace metals concentrations in soil and pore water of the polluted soil (PS) and the three treatments: polluted soil amended with 25% of technosol (TE25), polluted soil amended with 50% of technosol (TE50), and polluted soil amended with 30% of compost (CO30).

Soil
	PS	TE25	TE50	CO30
pH*	2.56 ± 0.09	5.24 ± 0.20^c	6.42 ± 0.18^a	5.50 ± 0.20^b
OM (%)*	0.03 ± 0.00	5.45 ± 0.17^c	10.66 ± 0.29^b	18.85 ± 0.61^a
TN (%)*	0.11 ± 0.01	0.47 ± 0.02^c	0.79 ± 0.03^b	0.97 ± 0.03^a
P2O5 (mg kg^−1)*	197.5 ± 6.45	281.51 ± 9.44^c	368.25 ± 12.02^b	8496.47 ± 269.78^a
Cd (mg kg^−1)*	0.41 ± 0.02	0.40 ± 0.02^a	0.38 ± 0.02^b	0.39 ± 0.01^b
Cu (mg kg^−1)*	260.45 ± 7.50	209.14 ± 7.29^a	151.91 ± 6.24^c	198.01 ± 6.29^b
Pb (mg kg^−1)	8.59 ± 0.72	17.43 ± 1.39^b	27.28 ± 1.77^a	17.38 ± 1.38^b
Zn (mg kg^−1)*	53 ± 1.58	60.80 ± 1.67^c	67.15 ± 1.82^b	70.72 ± 1.11^a
Pore Water
pH	2.97 ± 0.32	5.47 ± 0.68^a	6.51 ± 0.37^a	5.76 ± 0.54^a
DOC (%)	n.d.	1.32 ± 0.14^c	2.78 ± 0.21^b	3.57 ± 0.17^a
Cd (mg kg^−1)*	n.d.	n.d.	n.d.	n.d.
Cu (mg kg^−1)*	21.84 ± 1.72	13.9 ± 1.18^a	16.19 ± 1.38^a	14.73 ± 1.07^a
Pb (mg kg^−1)	1.21 ± 0.10	0.27 ± 0.02^b	0.98 ± 0.07^a	1.18 ± 0.08^a
Zn (mg kg^−1)*	0.34 ± 0.01	0.32 ± 0.01^b	0.35 ± 0.01^b	0.47 ± 0.02^a

Each value is the mean of five replicate measurements ± SE (standard error). n.d.: not detected. Different letters indicate significant difference between treatments at 𝑃≤0.05.
*Data from Novo et al. [6].