Potential Use of Organic- and Hard-Rock Mine Wastes on Aided Phytostabilization of Large-Scale Mine Tailings under Semiarid Mediterranean Climatic Conditions: Short-Term Field Study

Table 4

Evolution of chemical properties of experimental substrates (bulk) from the time of establishment of the field assay (year 1, 2006) and after 2 years (year 3, 2008), at a depth of 0–20 cm. Codes of treatments follow Table 1.

Treatment	pH		EC		CEC		SOC		Navailable		Pavailable		Kavailable		C : N ratio		Total Cu
			(mS cm^−1)		(meq 100 g^−1)		(%)		(mg kg^−1)		(mg kg^−1)		(mg kg^−1)				(mg kg^−1)
	Y 1	Y3	Y 1	Y3	Y 1	Y3	Y 1	Y3	Y 1	Y3	Y 1	Y3	Y 1	Y3	Y 1	Y3	Y 1	Y3
C	8.0	8.0	5.3	7.4	3,7	5.8	2.0	0.7	9	Bdl	8	8	142	73	56.6	6.7	6248	6140
RM	7.6	7.9	9.1	11.9	18,1	7.8	3.3	1.5	14	13	139	53	2821	826	12.7	7.9	6445	6604
RMS	7.4	7.8	5.9	6.9	21,5	9.7	2.6	1.2	35	11	42	25	469	269	18.7	9.0	4910	5728
B1	8.1	8.0	13.5	15.0	9,3	4.9	2.0	1.1	480	425	287	47	616	232	10.8	4.3	4655	5876
B2	7.8	7.7	26.4	19.6	31,5	7.0	5.0	1.3	984	814	993	87	2127	404	6.4	4.9	4013	4839
G1	8.2	7.9	8.9	7.5	12,6	4.9	2.5	1.4	24	9	54	13	1264	155	48.3	9.1	6506	6879
G2	7.6	8.0	12.0	8.9	24,0	8.2	3.4	2.0	180	6	269	40	4727	422	8.5	7.3	3394	5208
O1	8.1	8.0	8.5	6.5	6,5	5.8	2.4	1.1	5	Bdl	15	8	713	81	28.3	14.4	8588	7369
O2	7.8	8.0	10.2	7.9	8,4	5.6	5.8	1.6	26	Bdl	16	8	1464	188	37.3	12.8	6739	5215
GB	8.0	8.1	12.0	9.3	15,5	4.5	3.3	1.3	444	32	269	41	1850	295	21.2	9.1	7163	5928
GM	8.2	8.0	13.1	8.7	23,6	6.3	4.8	1.7	207	22	175	33	3088	333	91.8	7.4	7391	7353
OB	7.8	8.0	9.7	6.6	7,3	10.0	4.4	1.5	178	Bdl	77	16	885	102	23.4	12.6	5856	6178
OM	8.0	8.2	14.5	10.8	36,5	8.0	5.1	1.1	24	Bdl	84	20	3055	512	19.9	6.4	5857	5317

Y1: year 1; Y3: year 3; EC: electrical conductivity; CEC: cation exchange capacity; SOC: soil organic carbon; Bld: below detection limit.