# Du et al. 2026: Development of Compatible Biomass Models for Chinese Fir, Poplar, and Oak in Hunan Province

Du, Z., Liu, Z., Wang, J., Zou, Z., He, W., Zeng, W., Meng, J., & Chen, Z. (2026). Development of Compatible Biomass Models for Chinese Fir, Poplar, and Oak in Hunan Province. Forests, 17(7), 770.

- DOI: https://doi.org/10.3390/f17070770
- Access: open access
- Copy we read: https://www.mdpi.com/1999-4907/17/7/770/pdf?version=1782822414
- Status: no retraction or correction notice recorded (Crossref is asked weekly); last checked 2026-11-02
- Page: https://treeallometry.org/sources/du-2026/

## Equations from this source (9)

### Chinese fir aboveground biomass (compatible total-biomass system)

Aboveground biomass for Cunninghamia lanceolata, China. Inputs: DBH + Height. DBH 2.2–35.3 cm. 154 trees.

As printed (Table 8, Eq. 29-31):

> Baboveground = 0.065662D 1.750420 H 0.780381 (30)

Page: https://treeallometry.org/equations/du-2026-fir-agb/

### Chinese fir root biomass (compatible total-biomass system)

Root biomass for Cunninghamia lanceolata, China. Inputs: DBH + Height. 74 trees.

As printed (Table 8, Eq. 29-31):

> Broot = 0.024760 (D 2 H) 0.774387 (31)

Page: https://treeallometry.org/equations/du-2026-fir-root/

### Chinese fir total tree biomass (compatible total-biomass system)

Total biomass for Cunninghamia lanceolata, China. Inputs: DBH + Height. DBH 2.2–35.3 cm. 154 trees.

As printed (Table 8, Eq. 29-31):

> Btotal = 0.065662D 1.750420 H 0.780381 + 0.024760 (D 2 H) 0.774387 (29)

Page: https://treeallometry.org/equations/du-2026-fir-total/

### Oak aboveground biomass (compatible total-biomass system)

Aboveground biomass for Quercus, China. Inputs: DBH + Height. DBH 3.5–38.9 cm. 157 trees.

As printed (Table 10, Eq. 35-37):

> Baboveground = 0.0927573 (D 2 H) 0.89013 (36)

Page: https://treeallometry.org/equations/du-2026-oak-agb/

### Oak root biomass (compatible total-biomass system)

Root biomass for Quercus, China. Inputs: DBH + Height. 50 trees.

As printed (Table 10, Eq. 35-37):

> Broot = 0.018969 (D 2 H) 0.89162 (37)

Page: https://treeallometry.org/equations/du-2026-oak-root/

### Oak total tree biomass (compatible total-biomass system)

Total biomass for Quercus, China. Inputs: DBH + Height. DBH 3.5–38.9 cm. 157 trees.

As printed (Table 10, Eq. 35-37):

> Btotal = 0.0927573 (D 2 H) 0.89013 + 0.018969 (D 2 H) 0.89162 (35)

Page: https://treeallometry.org/equations/du-2026-oak-total/

### Poplar aboveground biomass (compatible total-biomass system)

Aboveground biomass for Populus, China. Inputs: DBH + Height. DBH 2.2–37.9 cm. 150 trees.

As printed (Table 9, Eq. 32-34):

> Baboveground = 0.046471D 2.171796 H 0.462424 (33)

Page: https://treeallometry.org/equations/du-2026-poplar-agb/

### Poplar root biomass (compatible total-biomass system)

Root biomass for Populus, China. Inputs: DBH + Height. 36 trees.

As printed (Table 9, Eq. 32-34):

> Broot = 0.013116 (D 2 H) 0.82231 (34)

Page: https://treeallometry.org/equations/du-2026-poplar-root/

### Poplar total tree biomass (compatible total-biomass system)

Total biomass for Populus, China. Inputs: DBH + Height. DBH 2.2–37.9 cm. 150 trees.

As printed (Table 9, Eq. 32-34):

> Btotal = 0.046471D 2.171796 H 0.462424 + 0.013116 (D 2 H) 0.82231 (32)

Page: https://treeallometry.org/equations/du-2026-poplar-total/