Tree Allometrics

Equations / Aboveground biomass, without leaves

Oak aboveground biomass without foliage or dead branches, Level 1

Aboveground biomass, without leavesQuercus (Q. robur and Q. petraea)CzechiaRead from the original paperPeer-reviewed source

Fitted on these 2 species: Quercus robur, Quercus petraea

2 of the 2 species it was fitted on · iNaturalist photos, hover for credit
Equation

As printed (Table 3, model below table and Aboveground biomass, Level 1 row, p. 115)

Biomass component = λ × exp(p₀ + p₁ × lnD); p₀ = −2.380, p₁ = 2.549, λ = 0.974

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

Aboveground biomass, without leaves = 0.974 * exp(-2.380 + 2.549 * ln(D))
D
Diameter at breast height (1.3 m), cm

The printed correction factor multiplies the back-transformed prediction. Aboveground biomass comprises stem over bark and living branches; it excludes foliage and dead branches. The authors recommend a single aboveground equation over summing component predictions. The paper reports adjusted R², which is not stored as unadjusted R².

Source
–2.380 2.549
Equation · Table 3, aboveground biomass, Level 1, p. 115
Biomass component = λ × exp(p0 + p1 × lnD
Equation · Table 3 formula, p. 115
correction factor (λ)
Equation · Table 3 caption, p. 115
sum of stem-wood over bark and living branches.
Output · Methods, p. 111
no leaf biomass
output.excludes · Methods, p. 111
D (cm)
Units · Fig. 2, p. 111
AB (kg/tree)
Units · Fig. 4, p. 114
Quercus robur; Quercus petraea
taxon.members · Keywords, p. 109
different regions of the Czech Republic
Where · Abstract, p. 109
temperate region
Where · Keywords, p. 109
51 grown trees sampled from 6 sites
Trees measured · Abstract, p. 109
breast height diameter (D) ranging from 6 to 59 cm
Smallest DBH · Abstract, p. 109
breast height diameter (D) ranging from 6 to 59 cm
Largest DBH · Abstract, p. 109
0.991 0.122 0.974 9.7
Correction factor · Table 3, aboveground biomass, Level 1, p. 115
linearized model (Eq. 3)
method · Methods, p. 112
Trees measured
51
DBH range
6–59 cm
Correction factor
0.974 (applied)
Method
Linearized regression
Where
Six sites in the Czech Republic
Last checked
2026-11-05
Calculate
525
Aboveground biomass, without leaves (kg)
247
Carbon (kg), ×0.47
905
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%.

InputsExpectedWe getFrom
D = 30525525Computed from the printed form
Computed from the printed coefficients and correction factor.

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