# Avicennia lanata Stem biomass from DBH (Table 1)

Stem biomass equation for Avicennia lanata, Indonesia, from Hasidu et al. 2022. 13 trees. Listed on Tree Allometrics, a free library of tree allometric equations, each quoted from the source that published it.

## Equation

As printed in Hasidu et al. 2022 (Section 3.1, p. 401):

> coefficient g: 0.1143, coefficient h: 2.3429

Cite: https://treeallometry.org/equations/hasidu-2022-stem-dbh/#equation

In this library's units, ready to compute (stem biomass in kg):

```
Stem biomass = 0.1143 * D^2.3429
```

Inputs: D = Diameter at breast height (1.3 m) (cm).
The source's own form: 0.1143 * DBH^2.3429, with DBH in cm; output in kg.
Cite: https://treeallometry.org/equations/hasidu-2022-stem-dbh/#canonical

## What it covers

- Output: Stem biomass, kg
- Taxon: Avicennia lanata (species), family Acanthaceae; mangrove
- Where: In-active pond, Muna Regency, Southeast Sulawesi. Cite: https://treeallometry.org/equations/hasidu-2022-stem-dbh/#where
- Biomes: tropical, mangrove
- Stand: natural
- Trees measured: 13. Cite: https://treeallometry.org/equations/hasidu-2022-stem-dbh/#n_trees
- R²: 0.987. Cite: https://treeallometry.org/equations/hasidu-2022-stem-dbh/#r2
- Method: power-law regression Y = g X^h. Cite: https://treeallometry.org/equations/hasidu-2022-stem-dbh/#method
- Verification: read in the original source
- Last checked: 2026-11-02. Cite: https://treeallometry.org/equations/hasidu-2022-stem-dbh/#checked_at

A missing fit statistic is one the source doesn't state, or that we haven't recorded; it is never estimated. Outside the stated DBH range or region, the equation is an extrapolation.

## Source

Hasidu, L.O.A.F., Prasetya, A., Maharani, et al. (2022). Allometric Model, Aboveground Biomass and Carbon Sequestration of Natural Regeneration of Avicennia lanata (Ridley). at in-active Pond of Muna Regency, Southeast Sulawesi. HAYATI Journal of Biosciences, 29(3), 399-408.

- DOI: https://doi.org/10.4308/hjb.29.3.399-408
- Access: open access
- Copy we read: https://journal.ipb.ac.id/index.php/hayati/article/download/37040/23167
- Every equation from this source: https://treeallometry.org/sources/hasidu-2022/
- Cite: https://treeallometry.org/equations/hasidu-2022-stem-dbh/#source

## The facts, in the source's words

**Equation** (Section 3.1, p. 401):

> coefficient g: 0.1143, coefficient h: 2.3429

Cite: https://treeallometry.org/equations/hasidu-2022-stem-dbh/#equation

**Trees measured** (Section 2.2, p. 400):

> A total of 13 individuals of A. lanata with various DBH sizes was collected

Cite: https://treeallometry.org/equations/hasidu-2022-stem-dbh/#quote-fit-n-trees

**Our note:** Form Y = g X^h, no correction factor stated. The paper does not state units in the text; DBH in cm and biomass in kg are read from Table 2 and the axis labels of Figures 2 and 3. The DBH range of the 13 harvested trees is not stated (Table 2 describes the stand), so no range is given. Young natural regeneration: the stand census in Table 2 ran from 2.7 to 9.4 cm DBH and the stand was under 10 m tall (Section 2.1).

## Checks this equation passes

On every build, the library's form and the source's own form (in its units) must both give these values within 1%.

| Inputs | Expected | We get | From |
| --- | --- | --- | --- |
| D = 3 | 1.5 | 1.5 | Computed from the printed form: computed from the published form Y = g X^h |
| D = 6 | 7.61 | 7.61 | Computed from the printed form: computed from the published form Y = g X^h |
| D = 9 | 19.7 | 19.7 | Computed from the printed form: computed from the published form Y = g X^h |

Cite: https://treeallometry.org/equations/hasidu-2022-stem-dbh/#checks

The calculator on the page shows carbon as biomass × 0.47 (IPCC 2006 Guidelines, Vol. 4, Ch. 4, Table 4.3) and CO₂e as carbon × 44/12.

## How to cite

Cite the source for the equation: Hasidu, L.O.A.F., Prasetya, A., Maharani, et al. (2022). Allometric Model, Aboveground Biomass and Carbon Sequestration of Natural Regeneration of Avicennia lanata (Ridley). at in-active Pond of Muna Regency, Southeast Sulawesi. HAYATI Journal of Biosciences, 29(3), 399-408. https://doi.org/10.4308/hjb.29.3.399-408

Cite this page for the record and checks: Tree Allometrics (Restoration Scope), "Avicennia lanata Stem biomass from DBH (Table 1)", checked 2026-11-02, https://treeallometry.org/equations/hasidu-2022-stem-dbh/. Data CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Quotes are the authors' words.

Data for this equation: https://treeallometry.org/data/equations/hasidu-2022-stem-dbh.json
Report a problem: email info@restorationscope.com with the equation id (hasidu-2022-stem-dbh) and where the right value appears.