Soil CO2 flux from tropical peatland under different land clearingtechniques

Zulkefli Malik, . and Liza Nuriati Lim Kim Choo, . and Ismail Abu Bakar, . Soil CO2 flux from tropical peatland under different land clearingtechniques. pp. 131-137. ISSN 1394-9829

Measurement of CO2 flux was carried out at five sites at MARDI Peat Research Station in Sessang Sarawak. The sites represented four different types of land clearing technique namely felling and burning (FB) felling and stacking-outside the plot (FSO) felling stacking and chipping (FSC) and selective clearing (SC). The CO2 flux was measured using static chamber method connected to a portable CO2 infrared gas analyser. Soil CO2“C flux exhibited diurnal pattern with peak rates as high as 950 mg m-2 h-1 occurred during the mid afternoon (1100“1300). Emission of CO2 was highly correlated with soil temperature (r2 0.86) and water table (r2 0.63). Annual CO2 flux from the peat soil surface varies significantly among land clearing techniques. The highest estimated annual carbon loss as CO2 emission was 48.3 t/ha/year under FB area. The FSO and FSC land clearing methods significantly reduced the emission of CO2 with the estimated C loss around 33 t/ha/year. Annual emissions of CO2 from SC are lower compared to other land clearing techniques. There were no significant differences between the annual CO2 flux from SC and undisturbed forest.

Full text available from: Official URL: http://jtafs.mardi.gov.my/jtafs/38-1/Soil%20CO2%20...

Abstract

Measurement of CO2 flux was carried out at five sites at MARDI Peat Research Station in Sessang Sarawak. The sites represented four different types of land clearing technique namely felling and burning (FB) felling and stacking-outside the plot (FSO) felling stacking and chipping (FSC) and selective clearing (SC). The CO2 flux was measured using static chamber method connected to a portable CO2 infrared gas analyser. Soil CO2“C flux exhibited diurnal pattern with peak rates as high as 950 mg m-2 h-1 occurred during the mid afternoon (1100“1300). Emission of CO2 was highly correlated with soil temperature (r2 0.86) and water table (r2 0.63). Annual CO2 flux from the peat soil surface varies significantly among land clearing techniques. The highest estimated annual carbon loss as CO2 emission was 48.3 t/ha/year under FB area. The FSO and FSC land clearing methods significantly reduced the emission of CO2 with the estimated C loss around 33 t/ha/year. Annual emissions of CO2 from SC are lower compared to other land clearing techniques. There were no significant differences between the annual CO2 flux from SC and undisturbed forest.

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Item Type:	Article
AGROVOC Term:	Peatlands
AGROVOC Term:	Land clearing
AGROVOC Term:	Carbon dioxide
AGROVOC Term:	emission
AGROVOC Term:	Felling
AGROVOC Term:	Burning
AGROVOC Term:	Stacking
AGROVOC Term:	Soil temperature
AGROVOC Term:	Hydrology
AGROVOC Term:	Ecosystems
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:29
URI:	http://webagris.upm.edu.my/id/eprint/24532

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