组Group | 观测数Observations | 求和Summary | 平均Average | 方差Variance |
根段 | 16 | 1353.75 | 84.61 | 50.41 |
嫩枝 | 12 | 677.05 | 56.42 | 371.86 |
硬质 | 18 | 1054.72 | 58.60 | 585.27 |