Table 2. Soil properties among four thinning intensities of Chinese fir plantations.
| Variations | CK | LIT | MIT | HIT | F | P |
|---|---|---|---|---|---|---|
| SMC (%) | 29.51 ± 4.64 | 30.36 ± 4.73 | 31.57 ± 5.30 | 34.19 ± 7.47 | 0.13 | 0.939 |
| pH | 4.40 ± 0.12 | 4.37 ± 0.08 | 4.34 ± 0.05 | 4.43 ± 0.09 | 0.18 | 0.906 |
| SOC (g kg−1) | 20.71 ± 1.68b | 35.06 ± 1.43ab | 29.59 ± 3.77ab | 42.84 ± 6.17a | 6.07 | 0.019* |
| TN (g kg−1) | 0.12 ± 0.02 | 0.21 ± 0.02 | 0.19 ± 0.03 | 0.28 ± 0.06 | 2.95 | 0.098 |
| TP (g kg−1) | 0.32 ± 0.01 | 0.32 ± 0.02 | 0.30 ± 0.01 | 0.35 ± 0.01 | 1.52 | 0.282 |
| AN (mg kg−1) | 118.72 ± 15.28 | 171.11 ± 16.62 | 146.74 ± 8.26 | 162.33 ± 20.73 | 2.10 | 0.179 |
| AP (mg kg−1) | 1.80 ± 0.28b | 3.79 ± 0.52ab | 3.51 ± 0.25ab | 4.73 ± 0.63a | 7.33 | 0.011* |
| AK (mg kg−1) | 58.09 ± 3.83ab | 51.48 ± 3.37b | 47.87 ± 3.57b | 70.44 ± 3.11a | 8.14 | 0.008** |
| Mg (mg kg−1) | 69.19 ± 6.61 | 80.07 ± 6.84 | 73.18 ± 7.14 | 74.20 ± 9.16 | 0.36 | 0.785 |
| Mn (mg kg−1) | 85.65 ± 21.63 | 122.46 ± 39.55 | 88.09 ± 23.95 | 121.19 ± 24.60 | 0.51 | 0.687 |
| MBC (mg kg−1) | 121.07 ± 34.33 | 166.17 ± 67.15 | 221.67 ± 31.47 | 149.70 ± 46.71 | 0.81 | 0.524 |
| MBN (mg kg−1) | 41.33 ± 5.26 | 32.70 ± 2.22 | 35.80 ± 10.25 | 95.80 ± 42.11 | 1.86 | 0.215 |
Notes.
Values are mean ± stand error; ∗ indicates P < 0.05; ∗∗ indicates P < 0.01; and ∗∗∗ indicates P < 0.001; Different letters within a row indicate significant differences (P < 0.05) among the different treatments based on the one-way ANOVA results, followed by the Tukey HSD test results.
- CK
- no thinning
- LIT
- low intensity thinning
- MIT
- moderate intensity thinning
- HIT
- high intensity thinning
- SMC
- soil moisture content
- SOC
- soil organic carbon
- TN
- total nitrogen
- TP
- total phosphorous
- AN
- available nitrogen
- AP
- available phosphorous
- AK
- available potassium
- MBC
- microbial biomass carbon
- MBN
- microbial biomass nitrogen