Table 2.

Average values for soil parameters, organic and inorganic pools and process rates (means ± SE).

	Mean values per treatment
	[Ambient]		[eT]		[eCO2]		[eT] × [eCO2] [eT × eCO2]		[Ambient] × [D]		[eT × eCO2] × [D]
	Mean ± SE		Mean ± SE		Mean ± SE		Mean ± SE		Mean ± SE		Mean ± SE
	(n = 8)		(n = 3)		(n = 3)		(n = 4)		(n = 4)		(n = 4)
Soil parameters
SWC	0.34	0.01	0.32	0.01	0.34	0.00	0.33	0.01	0.08	0.01	0.06	0.01
pH	4.95	0.03	5.02	0.05	4.99	0.03	4.97	0.03	4.96	0.04	5.01	0.02
Soil N	0.31	0.01	0.27	0.02	0.26	0.02	0.29	0.02	0.32	0.01	0.33	0.03
MBN	79.31	5.89	93.39	14.16	63.65	9.89	93.34	6.59	99.44	7.09	120.26	6.03
Extractable organic and inorganic pools
NO3−	2.97	0.64	5.18	2.30	4.19	1.47	5.95	2.46	5.98	1.72	5.26	1.09
NH4+	1.11	0.20	0.87	0.12	0.95	0.13	0.89	0.11	12.23	4.54	13.13	2.99
DIN	4.09	0.76	6.04	2.25	5.13	1.45	6.84	2.51	18.21	6.15	18.39	3.56
DON	14.54	2.21	8.51	1.90	12.37	0.67	12.65	1.83	19.34	1.18	23.78	3.45
TDN	18.63	2.78	8.51	1.91	12.37	0.68	19.49	1.07	37.55	7.08	42.16	4.48
DOC	87.28	8.65	93.79	3.26	79.99	0.88	94.07	7.93	165.68	45.37	215.09	59.17
Gross process rates
NH4+ mineralizationa	2.72	0.38	1.75	0.76	2.62	0.35	2.97	0.49	4.03	0.30	6.97	0.81
NH4+ immobilizationab	2.08	0.49	1.14	0.51	1.82	0.23	3.44	1.05	5.18	1.73	10.59	3.89
Nitrification	1.77	0.42	2.24	0.80	2.73	0.20	2.38	0.73	3.89	0.17	4.56	0.62

The number of biological replicates is shown in parenthesis. Soil water content (SWC) is expressed in % of fresh soil; MBN microbial biomass N and TDN total dissolved nitrogen are expressed in µg N g⁻¹ DW; DIN dissolved inorganic nitrogen and DON dissolved organic nitrogen are expressed in µg N g⁻¹ DW. Ammonium (NH₄⁺) and nitrate (NO₃⁻) are expressed in µg N g⁻¹ DW. DOC dissolved organic carbon is expressed in µg C g⁻¹ DW. All process rates are expressed in µg N g⁻¹ DW d⁻¹.

^an = 3 for treatment [Ambient] × [D].

^bn = 3 for treatment [eT × eCO2].