Table 3 |
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|
C/N ratios of the organic matter within the grain size fractions of the topsoils after 3, 20, 55, 100, and 170 years under self-restoration and of an Albic Podzol, never been cultivated. |
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|
C/N ratios in grain size |
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|
|
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|
Sand |
Silt |
Clay |
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|
|
|
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|
Horizon |
Depth cm |
Coarse/Medium |
Fine |
Coarse |
Medium |
Fine |
|
|
|
|
||||||
|
2.0-0.2 |
0.2-0.063 |
0.063-0.020 |
0.020-0.0063 |
0.0063-0.002 |
<0.002 |
||
|
|
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|
mm |
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|
|
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|
3 years |
|||||||
|
Ah |
10(12)(1) |
31.4 |
28.8 |
14.0 |
12.9 |
12.0 |
10.7 |
|
Ap1 |
22 |
25.0 |
24.2 |
14.2 |
12.1 |
12.0 |
11.2 |
|
33 |
34.7 |
nd |
14.9 |
14.3 |
12.0 |
10.9 |
|
|
Ap2 |
40 |
nd |
nd |
23.2 |
14.9 |
12.0 |
9.6 |
|
20 years |
|||||||
|
Ah |
2 |
21.0 |
24.5 |
16.5 |
13.2 |
12.4 |
8.3 |
|
Ap1 |
18 |
nd |
nd |
19.0 |
15.5 |
13.5 |
9.2 |
|
Ap2 |
25(28) |
nd |
nd |
21.3 |
18.0 |
15.5 |
10.1 |
|
55 years |
|||||||
|
Ah-E |
1 |
nd |
nd |
nd |
nd |
Nd |
nd |
|
Ap1 |
8 |
nd |
nd |
38.9 |
24.2 |
23.8 |
13.2 |
|
Ap2 |
19 |
nd |
nd |
45.2 |
26.3 |
24.2 |
15.0 |
|
100 years |
|||||||
|
E |
2 |
nd |
nd |
29.8 |
30.4 |
21.7 |
18.9 |
|
Bsh |
5 |
nd |
nd |
32.0 |
26.7 |
21.5 |
15.1 |
|
Ap |
10 |
36.7 |
nd |
30.9 |
24.0 |
21.6 |
13.7 |
|
170 years |
|||||||
|
E |
2 |
53.1 |
42.8 |
24.0 |
24.4 |
18.5 |
14.8 |
|
Bsh |
6 |
nd |
nd |
30.5 |
28.6 |
17.1 |
14.6 |
|
Ap |
15 |
nd |
nd |
46.9 |
29.9 |
24.9 |
17.5 |
|
Albic Podzol |
|||||||
|
E |
6(8) |
nd |
nd |
44.6 |
38.0 |
28.5 |
17.7 |
|
Bsh |
10 |
nd |
nd |
31.6 |
26.8 |
22.9 |
17.5 |
|
|
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|
nd - not determined (1) Depths descriptions in parentheses indicate partly thicker horizons |
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|
Kalinina et al. Carbon Balance and Management 2010 5:1 doi:10.1186/1750-0680-5-1 |
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