Preprints
https://doi.org/10.5194/egusphere-2024-1143
https://doi.org/10.5194/egusphere-2024-1143
06 May 2024
 | 06 May 2024

Biochar reduces early-stage mineralization rates of plant residues more in coarse than fine-texture soils – an artificial soil approach

Thiago M. Inagaki, Simon Weldon, Franziska B. Bucka, Eva Farkas, and Daniel P. Rasse

Abstract. Quantifying the impact of biochar on carbon persistence across soil textures is complex, owing to the variability in soil conditions. Using artificial soils with precise textural and mineral composition, we could disentangle the effects of biochar from the effects of soil particle size. We can show that biochar application significantly reduces early-stage carbon mineralization rates of plant residues in various soil textures (from 5 to 41 % clay) but more significantly in sandy soils. This finding suggests that biochar can compensate for the lack of clay in promoting C persistence in soil systems. This short report significantly contributes to understanding soil texture and biochar application interactions.

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Thiago M. Inagaki, Simon Weldon, Franziska B. Bucka, Eva Farkas, and Daniel P. Rasse

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2024-1143', Marie-Liesse Aubertin, 11 Jun 2024
    • AC1: 'Reply on RC1', Franziska Bucka, 22 Jul 2024
  • RC2: 'Comment on egusphere-2024-1143', Anonymous Referee #2, 26 Jun 2024
    • AC2: 'Reply on RC2', Franziska Bucka, 22 Jul 2024
Thiago M. Inagaki, Simon Weldon, Franziska B. Bucka, Eva Farkas, and Daniel P. Rasse
Thiago M. Inagaki, Simon Weldon, Franziska B. Bucka, Eva Farkas, and Daniel P. Rasse

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Short summary
Here, we investigated how biochar, a potential C sequestration tool, affects early carbon storage in different soil types. We created artificial soils to isolate the impact of soil texture. We found that biochar significantly reduces plant residue’s breakdown in all soil textures, but mainly sandy soils, which naturally hold less carbon. This suggests biochar could be a valuable tool for improving soil health, especially in sandy soils.