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Effect of compaction on soil CO2 and CH4 fluxes from tropical peatland in Sarawak, Malaysia

Author

Listed:
  • Nur Azima Busman

    (Universiti Putra Malaysia (UPM)
    Sarawak Tropical Peat Research Institute)

  • Nagamitsu Maie

    (Kitasato University)

  • Che Fauziah Ishak

    (Universiti Putra Malaysia (UPM))

  • Muhammad Firdaus Sulaiman

    (Universiti Putra Malaysia (UPM))

  • Lulie Melling

    (Sarawak Tropical Peat Research Institute)

Abstract

Tropical peatland stores a large amount of carbon (C) and is an important C sink. In Malaysia, about 25% of the peatland area has been converted to oil palm plantation where drainage, compaction and groundwater table control are prerequisite. To date, relationship between land compaction and C emission from tropical peatland is scarcely studied. To understand the effect of compaction on soil carbon dioxide (CO2) and methane (CH4) flux from tropical peatland, a laboratory soil column incubation was conducted. Peat soil collected from a Mixed Peat Swamp forest were packed in polyvinyl chloride pipes to three different soil bulk densities (BD); 0.14 g cm–3, 0.18 g cm–3 and 0.22 g cm–3. Soil CO2 and CH4 flux from the soil columns were measured on weekly basis for twelve weeks. Total soil porosity and moisture retention of each soil BD were also determined using another set of peat sample packed into 100 cm3 soil core ring. Soil porosity decreased while soil moisture retention increased proportionally with increasing soil BD. Soil CH4 flux were reduced approximately by 22% with compaction. On contrary, soil CO2 fluxes were greater (P ≤ 0.05) at compacted soil when infiltration and percolation of rainwater become slower with time, until soil moisture becomes limiting factor. This study suggested that compaction affects water movement and gaseous transport in the peat profile, thus influences C emission from peat soil.

Suggested Citation

  • Nur Azima Busman & Nagamitsu Maie & Che Fauziah Ishak & Muhammad Firdaus Sulaiman & Lulie Melling, 2021. "Effect of compaction on soil CO2 and CH4 fluxes from tropical peatland in Sarawak, Malaysia," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 23(8), pages 11646-11659, August.
    • Handle: RePEc:spr:endesu:v:23:y:2021:i:8:d:10.1007_s10668-020-01132-y
    DOI: 10.1007/s10668-020-01132-y
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    References listed on IDEAS

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    1. Suzanne B. Hodgkins & Curtis J. Richardson & René Dommain & Hongjun Wang & Paul H. Glaser & Brittany Verbeke & B. Rose Winkler & Alexander R. Cobb & Virginia I. Rich & Malak Missilmani & Neal Flanagan, 2018. "Tropical peatland carbon storage linked to global latitudinal trends in peat recalcitrance," Nature Communications, Nature, vol. 9(1), pages 1-13, December.
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