Formation and decay of peat bogs in the vegetable belt of Switzerland

Swiss Journal of Geosciences

Table 3 Calculation of organic matter (LOI) and C-losses of profile 1

Depth (cm)	LOI (%)	Bulk density (g cm⁻³)	Thickness (cm) (1)	Skeleton proportion (weight-%)	Density of organic matter (g cm⁻³)	Former thickness, primary subsidence (cm) (2)	Former thickness, primary and secondary subsidence (cm) (3)	LOI loss (kg m⁻²)	C-loss (kg m⁻²)
0–10	72.6	0.31	10	13	0.20	22.8	30.2	17.49	9.13
10–20	72.3	0.37	10	13	0.23	26.8	30.8	17.99	9.39
20–30	72.1	0.39	10	1	0.28	32.0	35.4	21.93	11.45
30–40	68.6	0.35	10	27	0.18	20.6	29.2	16.56	8.64
40–50	76.6	0.24	10	32	0.12	14.5	20.4	8.95	4.67
50–60	83.0	0.15	10	0	0.13	14.6	21.6	10.02	5.23
60–70	88.4	0.13	10	0	0.11	13.1	14.7	4.09	2.14
70–80	90.0	0.13	10	5	0.11	13.3	12.1	1.78	0.93
80–90	82.6	0.13	10	21	0.08	9.8	17.5	6.50	3.39
90–100	83.3	0.18	10	0	0.15	17.5	21.3	9.78	5.10
100–110	84.0	0.13	10	5	0.11	12.4	19.5	8.20	4.28
110–120	88.1	0.11	10	3	0.09	10.7	14.8	4.13	2.16
120–130	92.1	0.09	10	0	0.09	10.0	10.0	0	0
130–135	76.6	0.20	5	0	0.15	8.8	14.9	4.22	2.20
						Sum of difference (cm) = (2)—(1)	Sum of difference (cm) = (3)—(1)	Sum (kg m⁻²)	Sum (kg m⁻²)
						91.8	157.4	131.6	68.7

The average, annual C loss is calculated form the sum of C losses divided by 150 years (result = 0.458 kg m⁻² year⁻¹ = 4.58 t ha⁻¹ year⁻¹)