Tree Allometrics

Larix gmelinii / Stem biomass

Larch (Larix gmelinii) stem biomass from D only (System 1, Table 4)

Stem biomassLarix gmelinii · PinaceaeChinaplantationRead from the original paper
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Equation

As printed (Eqs. (1) and Table 4)

lnWs = a* + b* × lnD; Table 4, Larch, System 1 (D only): Stem | -3.7797 | 2.8778

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

Stem biomass = exp(-3.7797 + 2.8778 * ln(D))
D
Diameter at breast height (1.3 m), cm

Larch (Larix gmelinii) plantations, System 1 (D only) of Table 4: ln W = a* + b* ln D, natural logarithm, coefficients as printed (a*, b*, c*). No correction factor is stated in the paper, none applied. n and D/H ranges from Table 2 (sample statistics of the fitted trees). Stem includes bark; roots exclude fine roots <5 mm. No R2 recorded (adjusted R2 only).

Source
a total of 114 Korean pine trees, 90 larch trees, and 85 Mongolian pine trees were destructively sampled
Trees measured · Section 2.2
Trees measured
90
DBH range
7.6–35.7 cm
Height range
8.3–27 m
Method
seemingly unrelated regression (SUR) on log-transformed additive system, ln W = a + b ln D
Where
Pure plantations, northeast China
Last checked
2026-11-02
Calculate
19.3
Stem biomass (kg)
9.07
Carbon (kg), ×0.47
33.2
CO₂e (kg), ×44/12
Fitted DBH range02004006008001,000510152025303540DBH (cm)Stem biomass (kg)Stem 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 = 10.419.319.3Computed from the printed form
computed from the published form (coefficients as printed)
D = 18.8106106Computed from the printed form
computed from the published form (coefficients as printed)
D = 30.1411411Computed from the printed form
computed from the published form (coefficients as printed)

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