年份 | 有机质/(g·kg-1) Organic matter content |
| 统计特征值Statistical characteristic valu | ||||||
最小值 | 最大值 | 平均值 | 标准差 |
| 方差 | 变异系数/% | 偏度 | 峰度 | |
Year | Min. | Max. | Average | Standard deviation |
| Variance | Coefficient of variation | Skewness | Kurtosis |
2005 | 5.4 | 18.9 | 11.81 | 2.01 |
| 4.03 | 17.00 | 0.04 | 0.21 |
2010 | 5.7 | 17.4 | 11.88 | 1.99 |
| 3.95 | 16.73 | −0.27 | 0.27 |
2015 | 5 | 20 | 13.11 | 3.98 |
| 15.86 | 30.37 | −0.27 | −0.92 |
2020 | 6.3 | 26 | 14.88 | 5.08 |
| 25.84 | 34.16 | 0.37 | −0.65 |