Table 2 Mean values of C and N content (g kg⁻¹) and C/N ratios in forest floor and mineral soil layers in natural forests and plantations at six sites across the eastern China.

From: Effects of land use change from natural forest to plantation on C, N and natural abundance of ¹³C and ¹⁵N along a climate gradient in eastern China

			MH		QY		XY		HT		DH		JF
			NF	PF	NF	PF	NF	PF	NF	PF	NF	PF	NF	PF
C	FF	Mean	417.8	448.1	378.6	421.1	239.5	305.4	430.1	479.8	474.2	485.4	458.5	491.5
	FF	SD	30.8	3.4	34.5	16.6	71.6	68.9	9.8	18.1	25.6	10.3	19.4	7.9
	0–10 cm	Mean	49.55	41.51	48.95	41.06	18.61	21.29	17.09	15.15	25.77	14.67	25.38	19.39
	0–10 cm	SD	15.23	10.54	30.83	21.11	4.84	4.77	4.14	3.20	1.93	4.34	2.54	0.24
	10–20 cm	Mean	30.19	12.64	26.67	23.41	7.98	12.24	10.03	12.87	12.53	5.05	15.83	12.48
	10–20 cm	SD	15.76	5.63	6.19	1.70	4.35	4.96	0.53	2.49	2.55	0.58	5.54	0.75
	20–40 cm	Mean	11.86	3.50	12.84	12.99	3.50	6.62	8.54	9.43	6.97	3.93	11.00	6.93
	20–40 cm	SD	2.84	0.58	2.59	2.22	1.61	2.34	1.62	1.45	0.61	0.48	3.99	1.16
	40–60 cm	Mean	4.27	3.81	6.97	5.82	2.57	4.69	5.47	6.02	5.14	3.03	6.58	6.21
	40–60 cm	SD	1.44	0.67	0.67	0.54	1.07	0.47	1.62	2.53	0.59	0.44	0.95	1.29
	60–80 cm	Mean	3.30	3.86	4.38	3.86	1.88	3.50	4.54	5.07	4.70	6.21	4.61	8.52
	60–80 cm	SD	0.49	0.41	0.96	0.66	0.91	1.35	1.45	3.06	0.82	2.78	0.12	5.20
	80–100 cm	Mean	4.51	3.92	2.76	3.07	2.21	2.98	4.06	4.31	3.57	3.41	3.34	3.28
	80–100 cm	SD	2.08	0.47	1.24	0.80	1.13	0.79	1.36	1.51	0.36	0.85	0.92	0.65
N	FF	Mean	11.2	11.1	15.1	12.1	11.6	12.2	14.3	7.3	15.7	12.3	13.3	6.5
	FF	SD	0.3	1.7	0.4	0.8	3.5	2.3	1.1	0.1	0.2	1.9	2.5	0.8
	0–10 cm	Mean	2.34	1.94	4.23	3.23	1.44	1.46	1.99	1.66	2.13	1.24	1.98	1.51
	0–10 cm	SD	0.72	0.52	2.10	1.18	0.40	0.35	0.32	0.27	0.03	0.31	0.12	0.07
	10–20 cm	Mean	1.41	0.75	2.60	2.42	0.65	0.77	1.30	1.48	1.13	0.60	1.32	1.13
	10–20 cm	SD	0.26	0.21	0.60	0.15	0.27	0.08	0.04	0.31	0.18	0.04	0.29	0.07
	20–40 cm	Mean	0.76	0.36	1.33	1.49	0.34	0.57	1.18	1.17	0.75	0.49	0.97	0.64
	20–40 cm	SD	0.09	0.04	0.37	0.20	0.16	0.08	0.22	0.22	0.08	0.07	0.23	0.10
	40–60 cm	Mean	0.39	0.45	0.79	0.69	0.28	0.49	1.00	0.97	0.67	0.45	0.66	0.64
	40–60 cm	SD	0.09	0.02	0.11	0.08	0.12	0.06	0.08	0.18	0.06	0.05	0.06	0.11
	60–80 cm	Mean	0.33	1.41	0.51	0.49	0.23	0.36	0.94	0.91	0.63	1.39	0.50	1.17
	60–80 cm	SD	0.06	0.81	0.13	0.08	0.08	0.13	0.14	0.22	0.06	0.68	0.02	0.82
	80–100 cm	Mean	0.40	0.48	0.34	0.36	0.25	0.33	0.92	0.90	0.57	0.56	0.36	0.35
	80–100 cm	SD	0.13	0.03	0.16	0.09	0.09	0.05	0.08	0.15	0.06	0.04	0.09	0.07
C:N	FF	Mean	21.5	21.5	25.1	35.1	20.6	24.9	30.2	65.3	30.1	40.1	35.1	75.7
	FF	SD	5.2	1.7	3.1	2.2	0.2	1.3	2.4	3.4	2.1	6.9	6.1	11.1
	0–10 cm	Mean	21.00	16.20	11.07	12.33	13.11	14.61	8.50	9.15	12.09	11.72	12.82	12.82
	0–10 cm	SD	7.97	2.87	1.51	1.74	1.60	1.38	0.93	1.52	1.00	0.87	1.04	0.37
	10–20 cm	Mean	16.00	9.71	10.27	9.69	12.00	15.63	7.71	8.74	11.02	8.40	11.82	11.10
	10–20 cm	SD	5.15	0.67	0.69	0.13	5.31	4.88	0.23	0.91	0.57	0.46	1.49	0.58
	20–40 cm	Mean	10.74	8.48	9.78	8.70	10.36	11.38	7.25	8.10	9.28	8.09	11.12	10.86
	20–40 cm	SD	1.95	1.47	1.05	0.42	0.82	2.87	0.80	0.52	0.74	0.46	1.94	0.30
	40–60 cm	Mean	10.04	4.07	8.94	8.41	9.27	9.64	5.46	6.01	7.72	6.77	10.00	9.74
	40–60 cm	SD	0.33	3.58	0.78	0.93	1.40	0.21	1.42	1.53	0.16	1.02	0.59	0.67
	60–80 cm	Mean	10.98	8.12	8.69	7.96	7.69	9.60	4.77	5.26	7.41	4.58	9.18	8.50
	60–80 cm	SD	2.66	0.95	0.48	0.31	1.92	0.31	0.99	1.98	0.67	0.53	0.39	2.83
	80–100 cm	Mean	37.09	41.29	8.20	8.45	8.45	8.92	4.38	4.70	6.36	6.12	9.24	9.41
	80–100 cm	SD	3.22	6.36	0.39	0.65	1.65	1.18	1.21	0.84	1.22	1.53	0.43	0.26

Data is the mean value (n = 3); FF (forest floor), MH (Mohe), QY (Qingyuan), XY (Xinyang), HT (Huitong), DH (Dinghushan), JF (Jianfengling), NF (natural forests), PF (plantation forests).

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Table 2 Mean values of C and N content (g kg⁻¹) and C/N ratios in forest floor and mineral soil layers in natural forests and plantations at six sites across the eastern China.

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