# Pan & Wang 2022: Additive Root Biomass Equations for Betula platyphylla Suk. Plantations in Northeast China

Pan, L., & Wang, X. (2022). Additive Root Biomass Equations for Betula platyphylla Suk. Plantations in Northeast China. Forests, 13(5), 661.

- DOI: https://doi.org/10.3390/f13050661
- Access: open access
- Copy we read: https://www.mdpi.com/1999-4907/13/5/661/pdf?version=1650953273
- Status: no retraction or correction notice recorded (Crossref is asked weekly); last checked 2026-11-02
- Page: https://treeallometry.org/sources/pan-2022/

## Equations from this source (6)

### Birch total root biomass, additive system (coarse + medium + fine), Heilongjiang site

Root biomass for Betula platyphylla, China. Inputs: DBH + Height. DBH 3.4–11.9 cm. 493 trees.

As printed (Eq. 7, Section 2.4):

> Y4 = Yt = M ∑ m=1 Ym = f1(X1, B1) + f2(X2, β2) + f3(X3, β3) + ε4

Page: https://treeallometry.org/equations/pan-2022-bgb-total-additive-heilongjiang/

### Birch total root biomass, additive system (coarse + medium + fine), Jilin site

Root biomass for Betula platyphylla, China. Inputs: DBH + Height. DBH 3.4–11.9 cm. 493 trees.

As printed (Eq. 7, Section 2.4):

> Y4 = Yt = M ∑ m=1 Ym = f1(X1, B1) + f2(X2, β2) + f3(X3, β3) + ε4

Page: https://treeallometry.org/equations/pan-2022-bgb-total-additive-jilin/

### Birch total root biomass, additive system (coarse + medium + fine), Liaoning site

Root biomass for Betula platyphylla, China. Inputs: DBH + Height. DBH 3.4–11.9 cm. 493 trees.

As printed (Eq. 7, Section 2.4):

> Y4 = Yt = M ∑ m=1 Ym = f1(X1, B1) + f2(X2, β2) + f3(X3, β3) + ε4

Page: https://treeallometry.org/equations/pan-2022-bgb-total-additive-liaoning/

### Birch total root biomass, disaggregated model (Eq. 24), Heilongjiang site

Root biomass for Betula platyphylla, China. Inputs: DBH + Height. DBH 3.4–11.9 cm. 493 trees.

As printed (Eq. 24, Section 3.3):

> ft(D, H; βt) = exp[Bt1 + βt2 ln DBH + βt3 ln HT + βts2S2 + βts3S3]

Page: https://treeallometry.org/equations/pan-2022-bgb-total-disagg-heilongjiang/

### Birch total root biomass, disaggregated model (Eq. 24), Jilin site

Root biomass for Betula platyphylla, China. Inputs: DBH + Height. DBH 3.4–11.9 cm. 493 trees.

As printed (Eq. 24, Section 3.3):

> ft(D, H; βt) = exp[Bt1 + βt2 ln DBH + βt3 ln HT + βts2S2 + βts3S3]

Page: https://treeallometry.org/equations/pan-2022-bgb-total-disagg-jilin/

### Birch total root biomass, disaggregated model (Eq. 24), Liaoning site

Root biomass for Betula platyphylla, China. Inputs: DBH + Height. DBH 3.4–11.9 cm. 493 trees.

As printed (Eq. 24, Section 3.3):

> ft(D, H; βt) = exp[Bt1 + βt2 ln DBH + βt3 ln HT + βts2S2 + βts3S3]

Page: https://treeallometry.org/equations/pan-2022-bgb-total-disagg-liaoning/