Equations / Stem biomass
Liriodendron tulipifera Stem W = aD + bD^2 (Table 10)
Stem biomassLiriodendron tulipifera · MagnoliaceaeSouth KoreaplantationRead from the original paper
© Nicholas A. Tonelli · CC BY · iNaturalistEquation
As printed (Table 10 (W=aD+bD^2))
Stem -3.058 0.423 0.964
In this library's units, ready to compute (kg)
Stem biomass = -3.058 * D + 0.423 * D^2D- Diameter at breast height (1.3 m), cm
W = dry weight in kg (Table 7 in kg), D = DBH in cm. The paper prints no correction factor, so none is applied. Predicts negative biomass below about 12 cm DBH (authors' remark), so the authors prefer the power form. DBH 5.9-38.7 cm and height 6.6-26.6 m are the min and max of the per-site ranges in Table 6 (Suwon, Jangseong, Gangjin; ages 8-34 years).
Source
doi:10.14578/jkfs.2016.105.4.463 · Open access · copy we read
조사한 백합나무 표준목은 40본이나 뿌리까지 굴취한 것은 21본이다.
- Trees measured
- 40
- DBH range
- 5.9–38.7 cm
- R²
- 0.964
- Method
- regression in SPSS 19.0
- Where
- Suwon (Gyeonggi), Jangseong and Gangjin (Jeollanam-do), South Korea
- Last checked
- 2026-11-02
Calculate
49.3
Stem biomass (kg)
23.17
Carbon (kg), ×0.47
84.97
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 = 15 | 49.3 | 49.3 | Computed from the printed form computed from the Table 10 coefficients |
| D = 30 | 289 | 289 | Computed from the printed form computed from the Table 10 coefficients |
Related
- Liriodendron tulipifera Stem W = aD^2H (Table 11) · Kang et al. 2016 · DBH + Height
- Liriodendron tulipifera Stem W = aD^b (Table 10) · Kang et al. 2016 · DBH
- Liriodendron tulipifera Stem W = a(D^2H)^b (Table 11) · Kang et al. 2016 · DBH + Height
- Liriodendron tulipifera Stem W = aD^b H^c (Table 11) · Kang et al. 2016 · DBH + Height
- Liriodendron tulipifera Above ground W = aD^2H (Table 11) · same paper · Aboveground biomass
- Liriodendron tulipifera Above ground W = aD^b (Table 10) · same paper · Aboveground biomass
- Liriodendron tulipifera Above ground W = a(D^2H)^b (Table 11) · same paper · Aboveground biomass
- Liriodendron tulipifera Above ground W = aD^b H^c (Table 11) · same paper · Aboveground biomass
- Liriodendron tulipifera Above ground W = aD + bD^2 (Table 10) · same paper · Aboveground biomass
- Liriodendron tulipifera Branch W = aD^2H (Table 11) · same paper · Branch biomass
- Liriodendron tulipifera Branch W = aD^b (Table 10) · same paper · Branch biomass
- Liriodendron tulipifera Branch W = a(D^2H)^b (Table 11) · same paper · Branch biomass