Larix gmelinii / Branch biomass
Larch (Larix gmelinii) branch biomass from D and H (System 2, Table 4)
Branch biomassLarix gmelinii · PinaceaeChinaplantationRead from the original paper
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Equation
As printed (Eqs. (2) and Table 4)
lnWb = a* + b* × lnD + c* × lnH; Table 4, Larch, System 2 (D and H): Branch | -3.3632 | 2.6728 | -0.7052
In this library's units, ready to compute (kg)
Branch biomass = exp(-3.3632 + 2.6728 * ln(D) - 0.7052 * ln(H))D- Diameter at breast height (1.3 m), cm
H- Total tree height, m
Larch (Larix gmelinii) plantations, System 2 (D and H) of Table 4: ln W = a* + b* ln D + c* ln H, 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
doi:10.3390/f7070136 · Open access · copy we read
a total of 114 Korean pine trees, 90 larch trees, and 85 Mongolian pine trees were destructively sampled
- 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 + c ln H
- Where
- Pure plantations, northeast China
- Last checked
- 2026-11-02
Calculate
Height from
3.14
Branch biomass (kg)
1.47
Carbon (kg), ×0.47
5.41
CO₂e (kg), ×44/12
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%.
| Inputs | Expected | We get | From |
|---|---|---|---|
| D = 10.4, H = 12 | 3.14 | 3.14 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 18.8, H = 17.6 | 11.7 | 11.7 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 30.1, H = 23.3 | 33.7 | 33.7 | Computed from the printed form computed from the published form (coefficients as printed) |
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- Larch (Larix gmelinii) branch biomass from D only (System 1, Table 4) · Dong et al. 2016 · DBH
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- Natural larch branch biomass from dbh (Table 5, with CF) · Meng et al. 2019 · DBH
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- Korean pine aboveground biomass from D and H (sum of components, System 2) · same paper · Aboveground biomass
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