Table 3.

Mean values and standard deviations for pH, EC, content of dissolved organic carbon (DOC), and the concentrations of St, Nt, Ca, Mg and Al in leachates at the beginning and after 12 weeks of leaching through soil substrates and composites in controlled conditions

		LS-c	LS-B	LS-P	HS-c	HS-B	HS-P
pH	s	1.8b§ ± 0.04	1.8b ± 0.02	1.8b ± 0.10	2.2b ± 0.03	2.2 ± 0.10	2.3b ± 0.10
	f	2.5a ± 0.08	2.8a ± 0.12	3.8a ± 0.26	2.6a ± 0.18	2.2 ± 0.22	2.9a ± 0.26
EC [mS cm−1]	s	10.80a ± 1.38	11.48a ± 0.42	10.91a ± 3.07	4.85a ± 0.29	5.52 ± 0.77	4.51a ± 0.49
	f	1.12b ± 0.32	0.71b ± 0.23	0.10b ± 0.03	2.74b ± 0.34	4.75 ± 1.00	2.40b ± 0.36
St [mg kg−1]	s	1570.8a ± 156.5	1585.9a ± 100.1	1583.3a ± 428.6	814.3a ± 31.4	841.4 ± 73.6	741.0a ± 74.4
	f	71.0b ± 20.3	53.7b ± 17.2	9.6b ± 4.6	625.7b ± 36.6	725.4 ± 63.6	588.0b ± 24.0
DOC [mg l−1]	s	82.84a ± 8.95	92.97a ± 9.38	117.13a ± 18.80	101.41a ± 9.54	127.00a ± 33.11	110.37a ± 15.38
	f	5.08b ± 0.33	20.47b ± 3.17	37.20b ± 10.72	9.78b ± 1.65	32.00b ± 4.03	29.56b ± 2.48
Nt [mg l−1]	s	14.65a ± 1.97	18.05a ± 1.02	16.42a ± 4.11	5.72a ± 0.31	7.68a ± 1.55	6.54a ± 0.69
	f	0.53b ± 0.04	1.46b ± 0.17	1.17b ± 0.33	0.43b ± 0.02	2.58b ± 0.67	0.82b ± 0.05
Ca [mg l−1]	s	474.41a ± 39.07	445.30a ± 26.10	442.78a ± 33.14	550.23a ± 17.79	552.79a ± 14.18	553.38 ± 50.04
	f	5.84b ± 1.28	13.66b ± 4.08	5.20b ± 6.11	467.27b ± 24.03	494.78b ± 21.99	495.56 ± 17.26
Mg [mg l−1]	s	2.21a ± 1.73	7.85a ± 1.48	8.01a ± 3.14	0.01c ± 0.00	1.62ad ± 0.96	0.85d ± 1.70
	f	0.01b ± 0.00	0.68b ± 0.12	0.07b ± 0.14	0.01c ± 0.03	2.24a ± 0.49	0.48d ± 0.09
Al [mg l−1]	s	73.24a ± 12.42	61.17a ± 6.95	60.68a ± 25.23	42.95a ± 6.32	32.42a ± 10.98	21.66a ± 9.22
	f	0.22b ± 0.16	0.05b ± 0.04	0.06b ± 0.04	0.74b ± 0.41	1.77b ± 0.47	0.21b ± 0.14

Different letters indicate significant differences in the measured values at the beginning and at the end of the experiment (p = 0.05, pairwise t test)

s at the beginning of experiment, f after 12 weeks