# Mongolian pine (Pinus sylvestris var. mongolica) root biomass from D and H (System 2, Table 4)

Root biomass equation for Pinus sylvestris var. mongolica, China, from Dong et al. 2016. 85 trees, DBH 6–38.7 cm. Listed on Tree Allometrics, a free library of tree allometric equations, each quoted from the source that published it.

## Equation

As printed in Dong et al. 2016 (Eqs. (2) and Table 4):

> lnWr = a* + b* × lnD + c* × lnH; Table 4, Mongolian pine, System 2 (D and H): Root | -2.5406 | 1.9752 | -0.0606

Cite: https://treeallometry.org/equations/dong-2016-mongolian-pine-sys2-root/#equation

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

```
Root biomass = exp(-2.5406 + 1.9752 * ln(D) - 0.0606 * ln(H))
```

Inputs: D = Diameter at breast height (1.3 m) (cm); H = Total tree height (m).
The source's own form: exp(-2.5406 + 1.9752 * ln(D) - 0.0606 * ln(H)), with D in cm, H in m; output in kg.
Cite: https://treeallometry.org/equations/dong-2016-mongolian-pine-sys2-root/#canonical

## What it covers

- Output: Root biomass, kg
- Taxon: Pinus sylvestris var. mongolica (species), family Pinaceae; conifer
- Where: Pure plantations, northeast China. Cite: https://treeallometry.org/equations/dong-2016-mongolian-pine-sys2-root/#where
- Biomes: temperate
- Stand: plantation
- Trees measured: 85. Cite: https://treeallometry.org/equations/dong-2016-mongolian-pine-sys2-root/#n_trees
- DBH range: 6–38.7 cm. Cite: https://treeallometry.org/equations/dong-2016-mongolian-pine-sys2-root/#dbh
- Height range: 3.5–22.3 m. Cite: https://treeallometry.org/equations/dong-2016-mongolian-pine-sys2-root/#height
- Method: seemingly unrelated regression (SUR) on log-transformed additive system, ln W = a + b ln D + c ln H. Cite: https://treeallometry.org/equations/dong-2016-mongolian-pine-sys2-root/#method
- Verification: read in the original source
- Last checked: 2026-11-02. Cite: https://treeallometry.org/equations/dong-2016-mongolian-pine-sys2-root/#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

Dong, L., Zhang, L., & Li, F. (2016). Developing Two Additive Biomass Equations for Three Coniferous Plantation Species in Northeast China. Forests, 7(7), 136.

- DOI: https://doi.org/10.3390/f7070136
- Access: open access
- Copy we read: https://www.mdpi.com/1999-4907/7/7/136/htm
- Every equation from this source: https://treeallometry.org/sources/dong-2016/
- Cite: https://treeallometry.org/equations/dong-2016-mongolian-pine-sys2-root/#source

## The facts, in the source's words

**Equation** (Eqs. (2) and Table 4):

> lnWr = a* + b* × lnD + c* × lnH; Table 4, Mongolian pine, System 2 (D and H): Root | -2.5406 | 1.9752 | -0.0606

Cite: https://treeallometry.org/equations/dong-2016-mongolian-pine-sys2-root/#equation

**Trees measured** (Section 2.2):

> a total of 114 Korean pine trees, 90 larch trees, and 85 Mongolian pine trees were destructively sampled

Cite: https://treeallometry.org/equations/dong-2016-mongolian-pine-sys2-root/#quote-fit-n-trees

**Our note:** Mongolian pine (Pinus sylvestris var. mongolica) plantations, System 2 (D and H) of Table 4: ln W = a* + b* ln D + c* ln H, natural logarithm, coefficients as printed (a*, b*, c*). No correction factor is stated in the paper, none applied. n and D/H ranges from Table 2 (sample statistics of the fitted trees). Stem includes bark; roots exclude fine roots <5 mm. No R2 recorded (adjusted R2 only).

## 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 = 9.3, H = 7.3 | 5.72 | 5.72 | Computed from the printed form: computed from the published form (coefficients as printed) |
| D = 19.1, H = 12.9 | 22.9 | 22.9 | Computed from the printed form: computed from the published form (coefficients as printed) |
| D = 32.2, H = 18.5 | 62.8 | 62.8 | Computed from the printed form: computed from the published form (coefficients as printed) |

Cite: https://treeallometry.org/equations/dong-2016-mongolian-pine-sys2-root/#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: Dong, L., Zhang, L., & Li, F. (2016). Developing Two Additive Biomass Equations for Three Coniferous Plantation Species in Northeast China. Forests, 7(7), 136. https://doi.org/10.3390/f7070136

Cite this page for the record and checks: Tree Allometrics (Restoration Scope), "Mongolian pine (Pinus sylvestris var. mongolica) root biomass from D and H (System 2, Table 4)", checked 2026-11-02, https://treeallometry.org/equations/dong-2016-mongolian-pine-sys2-root/. 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/dong-2016-mongolian-pine-sys2-root.json
Report a problem: email info@restorationscope.com with the equation id (dong-2016-mongolian-pine-sys2-root) and where the right value appears.