Equations / Branch biomass
Oak branch biomass from D, additive system 1 (Table 4)
Branch biomassQuercus (Q. mongolica and Q. wutaishanica) · FagaceaeChinanaturalRead from the original paper
Fitted on these 2 species: Quercus mongolica, Quercus wutaishanica
Equation
As printed (Table 4, System 1)
Branch Wbr = 0.011D2.772
In this library's units, ready to compute (kg)
Branch biomass = 0.011 * D^2.772D- Diameter at breast height (1.3 m), cm
Fitted on 120 Mongolian oak and 39 Liaodong oak trees (Table 1; D 1.5-33.0 cm). Exponents are printed flattened in the HTML text; read as D^exponent. No R2 recorded (adjusted R2 only).
Source
doi:10.3390/f12060715 · Open access · copy we read
A total of 159 sample trees
- Trees measured
- 159
- DBH range
- 1.5–33 cm
- Height range
- 1.4–20.5 m
- Method
- weighted nonlinear seemingly unrelated regression (NSUR), additive system
- Where
- Daxing'anling, Xiaoxing'anling and Changbai mountains, NE China
- Last checked
- 2026-11-02
Calculate
0.953
Branch biomass (kg)
0.448
Carbon (kg), ×0.47
1.64
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 = 5, H = 4 | 0.953 | 0.953 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 15, H = 9 | 20 | 20 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 28, H = 16 | 113 | 113 | Computed from the printed form computed from the published form (coefficients as printed) |
Related
- Quercus candicans: branch biomass · Cortés-Sánchez et al. 2019 · DBH
- Quercus coccolobifolia: branch biomass · Cortés-Sánchez et al. 2019 · DBH + Height
- Quercus group 1 (rugosa, candicans, laurina): branch biomass · Cortés-Sánchez et al. 2019 · DBH + Height
- Quercus group 2 (obtusata, coccolobifolia, sideroxyla): branch biomass · Cortés-Sánchez et al. 2019 · DBH + Height
- Quercus laurina: branch biomass · Cortés-Sánchez et al. 2019 · DBH + Height
- Quercus obtusata: branch biomass · Cortés-Sánchez et al. 2019 · DBH + Height
- Quercus rugosa: branch biomass · Cortés-Sánchez et al. 2019 · DBH + Height
- Quercus sideroxyla: branch biomass · Cortés-Sánchez et al. 2019 · DBH + Height
- Oak aboveground biomass from D, additive system 1 (Table 4) · same paper · Aboveground biomass
- Oak branch biomass from D and crown width, additive system 2 (Table 4) · same paper · Branch biomass
- Oak foliage biomass from D, additive system 1 (Table 4) · same paper · Foliage biomass
- Oak foliage biomass from D and crown width, additive system 2 (Table 4) · same paper · Foliage biomass
- Oak root biomass from D (Table 3) · same paper · Root biomass