Tree Allometrics

Pinus sylvestris / Branch biomass

Mongolian pine (Pinus sylvestris var. mongolica) branch biomass from D and H (System 2, Table 4)

Branch biomassPinus sylvestris var. mongolica · PinaceaeChinaplantationRead from the original paper
Photo of Pinus sylvestris var. mongolica
© Douglas Goldman · CC BY-SA · iNaturalist
Equation

As printed (Eqs. (2) and Table 4)

lnWb = a* + b* × lnD + c* × lnH; Table 4, Mongolian pine, System 2 (D and H): Branch | -4.9247 | 2.8783 | -0.3612

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

Branch biomass = exp(-4.9247 + 2.8783 * ln(D) - 0.3612 * ln(H))
D
Diameter at breast height (1.3 m), cm
H
Total tree height, m

Mongolian pine (Pinus sylvestris var. mongolica) 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
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
85
DBH range
6–38.7 cm
Height range
3.5–22.3 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
2.17
Branch biomass (kg)
1.02
Carbon (kg), ×0.47
3.74
CO₂e (kg), ×44/12
Fitted DBH range020406080100120140160510152025303540DBH (cm)Branch biomass (kg)Branch 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 = 9.3, H = 7.32.172.17Computed from the printed form
computed from the published form (coefficients as printed)
D = 19.1, H = 12.91414Computed from the printed form
computed from the published form (coefficients as printed)
D = 32.2, H = 18.555.455.4Computed from the printed form
computed from the published form (coefficients as printed)

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