# Populus trichocarpa

Salicaceae. 7 equations apply. Each output lists them most specific first: fitted on this species, on a variety of it, pooled fits that included it, then its genus and family. Within each step, equations the authors advised against go last, then those read from compilations; more trees come first. The order shows how specific the evidence is, not which equation predicts best.

## Aboveground biomass

1. Poudel et al. 2019 (this species): Fitted on this species; 19 trees; DBH 7.4–30.6 cm; Read from the original paper.
   - [Black cottonwood total aboveground biomass from DBH and height (Table 4)](https://treeallometry.org/equations/poudel-2019-populus-trichocarpa/), Poudel et al. 2019: Populus trichocarpa, United States; inputs DBH + Height; DBH 7.4–30.6 cm; 19 trees.

2. Du et al. 2026 (same genus): Fitted on the genus Populus; 150 trees across all species; DBH 2.2–37.9 cm; Read from the original paper.
   - [Poplar aboveground biomass (compatible total-biomass system)](https://treeallometry.org/equations/du-2026-poplar-agb/), Du et al. 2026: Populus, China; inputs DBH + Height; DBH 2.2–37.9 cm; 150 trees.

3. Forrester et al. 2017 (same genus): Fitted on the genus Populus; Number of trees not stated; DBH 0.1–44.7 cm; Read from the original paper.
   - [European general equation, Populus, aboveground, diameter only (Eq. 3)](https://treeallometry.org/equations/forrester-2017-populus/), Forrester et al. 2017: Populus, Europe (latitude min/mean/max 44.5 / 57.4 / 61 °N); inputs DBH; DBH 0.1–44.7 cm.

4. Chojnacky et al. 2014 (same family): Fitted on the family Salicaceae; Number of trees not stated; DBH 3–70 cm; Read from the original paper.
   - [North American taxa group: Salicaceae ≥ 0.35 spg (Table 5)](https://treeallometry.org/equations/chojnacky-2014-salicaceae-spg-ge-035/), Chojnacky et al. 2014: Salicaceae, United States; inputs DBH; DBH 3–70 cm.
   - [North American taxa group: Salicaceae < 0.35 spg (Table 5)](https://treeallometry.org/equations/chojnacky-2014-salicaceae-spg-lt-035/), Chojnacky et al. 2014: Salicaceae, United States; inputs DBH; DBH 3–53 cm.

## Total biomass

1. Du et al. 2026 (same genus): Fitted on the genus Populus; 150 trees across all species; DBH 2.2–37.9 cm; Read from the original paper.
   - [Poplar total tree biomass (compatible total-biomass system)](https://treeallometry.org/equations/du-2026-poplar-total/), Du et al. 2026: Populus, China; inputs DBH + Height; DBH 2.2–37.9 cm; 150 trees.

## Root biomass

1. Du et al. 2026 (same genus): Fitted on the genus Populus; 36 trees across all species; Read from the original paper.
   - [Poplar root biomass (compatible total-biomass system)](https://treeallometry.org/equations/du-2026-poplar-root/), Du et al. 2026: Populus, China; inputs DBH + Height; 36 trees.