Equations / Foliage biomass
Oak foliage biomass from D and crown width, additive system 2 (Table 4)
Foliage biomassQuercus (Q. mongolica and Q. wutaishanica) · FagaceaeChinanaturalRead from the original paper
Covers the whole genus
Equation
As printed (Table 4, System 2)
Foliage Wfo = 0.023D1.645CW0.438
In this library's units, ready to compute (kg)
Foliage biomass = 0.023 * D^1.645 * CD^0.438D- Diameter at breast height (1.3 m), cm
CD- Crown diameter, m
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). CW is crown width; mapped to canonical CD. Crown width range 0.45-9.70 m (Table 1).
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
0.388
Foliage biomass (kg)
0.182
Carbon (kg), ×0.47
0.668
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, CD = 1.5 | 0.388 | 0.388 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 15, CD = 3.5 | 3.43 | 3.43 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 28, CD = 6 | 12.1 | 12.1 | Computed from the printed form computed from the published form (coefficients as printed) |
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- Six Guanajuato oaks pooled, system 1 (D and H): foliage (twigs with leaves) biomass · Cortés-Sánchez et al. 2019 · DBH
- Oak foliage biomass from D, additive system 1 (Table 4) · Meng et al. 2021 · DBH
- Oak aboveground biomass from D, additive system 1 (Table 4) · same paper · Aboveground biomass
- Oak branch biomass from D, additive system 1 (Table 4) · same paper · Branch 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 root biomass from D (Table 3) · same paper · Root biomass