Lulie Melling, Kah Joo Goh, Auldry Chaddyand Ryusuke Hatano
Proceedings of the 14th International Peat Congress
oil-palm, soil-ch4-flux, tropical-peatland
Melling et al 2012: Regulatory Factors of Soil CH4 Fluxes in Different Ages of Oil Palm on Tropical Peatland, Sarawak, Malaysia
Theme IX. Tropical peatlands
The objectives of this study were to quantify soil methane (CH4) fluxes and determine the regulatory factors affecting them in different ages of oil palm on tropical peatland in Sarawak, Malaysia. Monthly soil CH4 fluxes were measured using a closed chamber method. Soil CH4 fluxes decreased with palm age with values of 53.8, 23.1 and 17.5 μg C m-2 h-1 for 1, 5 and 7 year old palms, respectively. This may due to the release of trapped CH4 in the peat vacuoles upon drainage and the increasing degree of CH4 oxidation in the drained anoxic peat layers of older plantings. The significant correlations between rainfall, water table and water-filled pore space (WFPS) with soil CH4 fluxes emphasized the importance of moisture in soil CH4 fluxes in tropical peatland.