Table 10 Validation of simultaneously fitted models
From: Allometric equations for estimating belowground biomass of Androstachys johnsonii Prain
Root component | Inside the study area (n = 21) | Outside the study area (n = 16) | Total (n = 37) | ||||||
|---|---|---|---|---|---|---|---|---|---|
AD (%) | V | p-value | AD (%) | V | p-value | AD (%) | V | p-value | |
Using DBH and TH as independent variables | |||||||||
 Taproot | −1.7243 | 121.0 | 0.8649 | 5.6595 | 63.0 | 0.8209 | −0.8602 | 378.0 | 0.9201 |
 Lateral roots | 0.6760 | 120.0 | 0.8917 | 5.8973 | 46.0 | 0.2744 | 4.7203 | 303.0 | 0.3352 |
 Root system | −0.3711 | 117.0 | 0.9729 | 5.7933 | 49.0 | 0.3484 | 2.2976 | 319.0 | 0.4639 |
Using only DBH as independent variable | |||||||||
 Taproot | −2.4598 | 127.0 | 0.7079 | 4.0529 | 63.0 | 0.4037 | −0.4861 | 393.0 | 0.7524 |
 Lateral roots | −0.4410 | 119.0 | 0.9187 | 3.4277 | 51.0 | 0.8209 | 5.0618 | 319.0 | 0.4639 |
 Root system | −1.3237 | 134.0 | 0.5392 | 3.7025 | 57.0 | 0.5966 | 2.6531 | 349.0 | 0.7634 |
Using only RCD as independent variable | |||||||||
 Taproot | −5.3576 | 123.0 | 0.8117 | 3.5923 | 64.0 | 0.8603 | −2.8693 | 397.0 | 0.7093 |
 Lateral roots | −5.3553 | 134.0 | 0.5392 | 4.3072 | 63.0 | 0.8209 | 2.0879 | 370.0 | 1.0000 |
 Root system | −5.3563 | 131.0 | 0.6091 | 3.9955 | 61.0 | 0.7436 | −0.0734 | 369.0 | 0.9886 |