Artificial Macropore Installation to Degraded Soils for Carbon Storage

  • 15.Life on land
  • 13.Climate action
  • 14.Life below water

Background / Objectives

  Soils are largest carbon storage in terrestrial region, and buffer materials for global warming. However, soils are degraded in climate change and removed by heavy rain. Soil pore structure has dual porosity nature of  macropore and micropore, which controls the solute transport in soils. We introduced artificial macropore to enhance infiltration, recover the vegetation and effectively accumulate the organic matter.

Desired outcome

  Field experiment showed that rainfall was effectively stored and soil organic matter was increased, along with recovered weed flora. We estimate that this technique recovers 20% of terrestrial carbon budget which is similar to large afforestation. This technique is simple, thus many people can use  as a countermeasure for land degradation.

X-ray radiography of natural soils. Plant root macropores are predominant
Artificial macropore. Fibrous materials are installed for effective infilration
Simulated infiltration. Enhanced infiltration was observed
Left: Macropore plot, Right: Control plot.
Dark green color was observed at macropore plot. Plant biomass was larger, soil organic matter was larger than control plot. Surface flow and also the soil erosion were avoided.
URL

http://www.eme.okayama-u.ac.jp/Sections/Land/cv_mori.html

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