Tree Allometrics

Larix gmelinii / Root biomass

Dahurian larch root biomass from D only (MS-2) (Table 5)

Root biomassLarix gmelinii · PinaceaeChinanaturalRead from the original paper
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Equation

As printed (Table 5 (MS-2), Dahurian larch, root row; model form Eq. (14) structure)

Wr = e^β10 · D^β11; Dahurian larch | Root | -3.8165 | 2.5956

In this library's units, ready to compute (kg)

Root biomass = exp(-3.8165 + 2.5956 * ln(D))
D
Diameter at breast height (1.3 m), cm

Dahurian larch, additive system MS-2 (Table 5); W = exp(b0) * D^b1 (Eqs. 16 form per Table caption). Ranges and n from Table 2. The b0 column is the exponent of e (W = e^b0 ...), as in Eq. (14). Stem includes bark. Root excludes fine roots <5 mm. No R2 recorded (adjusted R2 only).

Source
138 Dahurian larch trees and 108 white birch trees were destructively sampled
Trees measured · Section 2.2
Trees measured
138
DBH range
1.7–28.4 cm
Height range
2.4–21.9 m
Method
seemingly unrelated regression (SUR), additive system, W = exp(b0) D^b1 H^b2
Where
Eastern Daxing'an Mountains, Heilongjiang, northeast China
Last checked
2026-11-02
Calculate
0.804
Root biomass (kg)
0.378
Carbon (kg), ×0.47
1.39
CO₂e (kg), ×44/12
Fitted DBH range050100150200250300350510152025303540DBH (cm)Root biomass (kg)Root biomass

Shaded: the DBH range the model was fitted on. Other inputs held at the values above.

Checks this equation passes

On every build, the library's form and the paper's own form (in its units) must both give these values within 1%.

InputsExpectedWe getFrom
D = 40.8040.804Computed from the printed form
computed from the published form (coefficients as printed)
D = 108.678.67Computed from the printed form
computed from the published form (coefficients as printed)
D = 1839.939.9Computed from the printed form
computed from the published form (coefficients as printed)

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