Equations / Aboveground biomass

Buddleja coriacea (colle) AGB per stem from diameter at 30 cm and height (sum of SUR components)

Aboveground biomassBuddleja coriacea · ScrophulariaceaeEcuadoragroforestryRead from the original paper

Equation

As printed (Tabla 4, Colle, Ramas gruesas)

W rg = 0,01489*d2 *Ht

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

Aboveground biomass = 0.025016 * D30^2 * H

D30: Stem diameter at 30 cm, cm
H: Total tree height, m

Multi-stemmed shrub (3–7 stems from the base): each sampled stem was treated as one individual, so the model gives biomass per stem; sum over stems for a plant. D30 = stem diameter 30 cm above ground (fitted range 8,6–15,6 cm). Total is the sum of the three Tabla 4 component equations.

Source

Riofrío, J., Herrero de Aza, C., Grijalva, J., & Bravo, F. (2013). Modelos para estimar la biomasa de especies forestales en sistemas agroforestales de la ecorregión andina del Ecuador. 6º Congreso Forestal Español, Vitoria-Gasteiz, Spain. Paper 6CFE01-023.

https://www.congresoforestal.es/actas/doc/6CFE/6CFE01-023.pdf · Open access

W rd = 0,006169*d2 *Ht

Equation · Tabla 4, Colle, Ramas delgadas

W h = 0,003957 *d2 *Ht

Equation · Tabla 4, Colle, Hojas

Biomasa total 2,09 0,925

R² · Tabla 4, Colle (RMSE kg, R2 ajustado)

sólo se seleccionó una rama por individuo para el muestreo destructivo, considerándose a cada muestra como un individuo diferente

Note · Metodología, Datos

Colle 13 11,1* 2,2 8,6 15,6 4,2 0,6 3,1 5,1

Trees measured · Tabla 1 (* = diameter at 30 cm above ground)

Trees measured: 13
Height range: 3.1–5.1 m
R²: 0.925
Method: Component models (coarse branches >2 cm, thin branches, leaves) fitted by SUR; total = sum of components
Where: Two INIAP agroforestry systems, inter-Andean western cordillera of northern/central Ecuador, above 3000 m (Bosque Siempreverde Montano Alto)
Last checked: 2026-11-01

Calculate

D30 (cm)Height (m)

Height from

12.95

Aboveground biomass (kg)

6.084

Carbon (kg), ×0.47

22.31

CO₂e (kg), ×44/12

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
D30 = 11.1, H = 4.2	12.9	12.9	Computed from the printed form computed at the sample means (observed mean Wt 13,8 kg, Tabla 1)
D30 = 15, H = 5	28.1	28.1	Computed from the printed form computed from the sum of published components

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Acacia melanoxylon AGB in Andean agroforestry, sum of SUR component models (DBH, height) · same paper · Aboveground biomass
Alnus acuminata (aliso) AGB, sum of SUR component models (DBH, height) · same paper · Aboveground biomass

Buddleja coriacea (colle) AGB per stem from diameter at 30 cm and height (sum of SUR components)

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