Table 4. Chemical and physical characteristics of soils. Mean values are shown (n = 4).
| Larch Plantation soil | Secondary Forest soil | |
|---|---|---|
| SOC (%) | 3.31 | 4.48 |
| TN (%) | 0.31 | 0.38 |
| C:N | 10.67 | 11.69 |
| δ13CV-PDB (%o) | -26.61 | -27.22 |
| pH (H2O) | 5.5 | 5.8 |
| SWC (%, dry basis) | 42.4 | 50.5 |
| Water-stable aggregate size fraction (%) | ||
| Macroaggregate (250 ~ 2000 μm) | 16.21 | 32.54 |
| Microaggregate (53 ~ 250 μm) | 37.70 | 37.99 |
| Silt plus clay particles (<53 μm) | 46.09 | 29.47 |
| Forest C input (litterfall+fine root) (g m-2 y-1)* | 229.4 | 594.3 |
| Basal respiration (mg C kg-1 soil d-1) | 8.03 | 11.04 |
| SOC-specific basal respiration (mg C kg-1 SOC d-1) | 242.6 | 246.5 |
| Microbial biomass (mg C kg-1 soil) | 529.6 | 727.9 |
| NO3--N (mg kg-1 soil) | 28.03 | 29.81 |
| NH4+-N (mg kg-1 soil) | 7.25 | 9.12 |
SOC, soil organic carbon; TN, total nitrogen; SWC, soil water content.
*Forest C input was reported by Yang et al. (2010) ref. 39.