Table 3 Content of total organic C, N and C/N ratio in each particle-size fraction in different sampling locations
Site | Particle size (μm) | TOCa (%) | TNb (%) | C/N |
|---|---|---|---|---|
Forest | Coarse (>250) | 19.5 | 1.1 | 17.9 |
Large (250–53) | 15.7 | 1.0 | 16.4 | |
Medium (53–20) | 19.8 | 1.3 | 15.6 | |
Small (20–2) | 22.7 | 1.9 | 11.8 | |
Fine (2–0.4) | 25.4 | 2.9 | 8.9 | |
Very fine (<0.4) | 27.7 | 3.3 | 8.5 | |
Transition | Coarse (<250) | 12.4 | 0.6 | 21.8 |
Large (250–53) | 5.8 | 0.3 | 17.5 | |
Medium (53–20) | 8.3 | 0.8 | 10.8 | |
Small (20–2) | 11.2 | 0.8 | 14.1 | |
Fine (2–0.4) | 10.2 | 0.9 | 11.8 | |
Very fine (<0.4) | 12.5 | 1.1 | 11.4 | |
Grassland | Coarse (>250) | 15.6 | 1.0 | 15.3 |
Large (250–53) | 14.8 | 0.8 | 17.7 | |
Medium (53–20) | 9.9 | 0.6 | 16.8 | |
Small (20–2) | 19.1 | 1.5 | 12.6 | |
Fine (2–0.4) | 18.8 | 3.2 | 5.8 | |
Very fine (<0.4) | 22.3 | 2.3 | 9.9 |