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June 13, 2026Soil AdvancesOpen Access

Planting density regulates root biomass and soil organic carbon stocks in Acacia mearnsii plantations

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Authors

BMBaizen Endalamaw MekonnenSDSeid Muhie DawudTGTsegaye Gobezie

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Overview

Randomized trial evaluates planting density effects on root biomass and soil carbon in Acacia mearnsii plantations, suggesting management strategies for optimal growth.

Key Points

  • This study aims to determine how different planting densities affect root biomass and soil organic carbon stocks in Acacia mearnsii plantations.
  • Evaluated planting densities from 0.5 m × 0.5 m to 1.5 m × 1.5 m in a randomized complete block design with four replications.
  • Sampled fine roots and soil using soil cores and coarse roots through pit excavation within the 0–50 cm soil profile.
  • Analyzed the effects of planting density and soil depth on root biomass and soil organic carbon stocks.
  • Denser plantings showed a 44% increase in fine root biomass, an 85% increase in coarse root biomass, and a 38% increase in soil organic carbon stocks compared to sparse plantings.
  • Root biomass components were significantly influenced by planting density and soil depth (p < 0.05).
  • Soil organic carbon stocks increased with higher root biomass, indicating enhanced carbon accumulation under denser planting densities.

Cite This Study

Mekonnen et al. (2026) studied this question.

synapsesocial.com/papers/6a2cf3d6faef96ed7f056391https://doi.org/10.1016/j.soilad.2026.100125
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