Table 2.
Effects of warming on soil total organic carbon, highly labile organic carbon, mid-labile organic carbon pools, labile organic carbon, recalcitrant organic carbon, and soil microbial biomass carbon
| Condition and site | Mean amt of carbon by fraction (g kg−1 soil [SD])a |
|||||
|---|---|---|---|---|---|---|
| TOC | HLOC | MLOC | LOC | RO-C | MBC | |
| Control | ||||||
| YT | 133 (9.97) | 9.13 (0.23) | 13.0 (1.01) | 19.0 (4.20) | 111 (7.92) | 1.37 (0.01) |
| XZ | 54.8 (5.91) | 5.80 (0.32) | 8.55 (0.30) | 9.93 (0.43) | 44.9 (6.13) | 1.08 (0.02) |
| XX | 35.5 (1.67) | 2.14 (0.07) | 3.12 (0.23) | 3.70 (0.31) | 31.8 (1.69) | 0.97 (0.02) |
| Warmed | ||||||
| YT | 117 (2.62) | 10.8 (0.15) | 18.6 (0.89) | 20.5 (4.26) | 98.5 (6.98) | 1.66 (0.10) |
| XZ | 49.2 (3.55) | 6.31 (0.07) | 8.67 (0.13) | 9.93 (0.32) | 39.3 (3.40) | 1.42 (0.04) |
| XX | 31.8 (1.26) | 3.39 (0.07) | 3.64 (0.13) | 4.32 (0.16) | 27.4 (1.14) | 1.25 (0.11) |
| P valueb | 0.005 | <0.001 | <0.01 | 0.547 | 0.010 | <0.001 |
a
TOC, total organic carbon; HLOC, highly labile organic carbon; MLOC, mid-labile organic carbon; LOC, labile organic carbon; RO-C, recalcitrant organic carbon; MBC, soil microbial biomass carbon.
b
Determined by ANOVA. Significant P values (<0.05) are in bold.