Soil CO2 Respiration Along Annual Crops or Land-cover Type Gradients on West Kalimantan Degraded Peatland Forest.

Kalimantan peatland spans ∼5.9million ha (∼11% of Kalimantan's total terrestrial land area) as a part ofIndonesian peatlands, covers∼21 million ha, contains∼57.8 Gtof terrestrial carbon. Land cover change of peatland forest results in significant sources CO 2 emissions. Thus, we identified to estimate carbon emissions generated by crop land and ex burnt activities in Kalimantan's peatlands degraded forest.Soil CO 2 respiration was measured under four of the most prominent land cover and annual agricultural crops on 4-5 year post fire (fern, corn, pineapple) and newly burnt areas in West Kalimantan peatlands. Measurements were obtained from Licor 8100 and gatheredby monthly assessments. Among the land cover types showed different meanmonthly CO 2 fluxes.Soil CO 2 respiration on newly burnt peatland, pineapple plantation and fern covered showed the highest and not significantly different among them. Cornsmall-scale plantation soil respired the lowest and significantly different from the other three land covers. Dry vs. rainy month comparisons show huge different (>50%) monthly CO 2 fluxes rate. Each land cover type has distinctive peat environmental factors that significantly affect CO 2 respiration. Theresult indicates that each crop/cover types generate different level site factors, which affect different level of peat CO 2 rates. The regression models of site factors measured for each specific land cover can be applied to obtain better estimate CO 2 respiration rates of degraded peatland and agricultural crop cover types. Moreover, it is able to be applied as a baseline for degraded peatland management and CO 2 emission mitigation. [ABSTRACT FROM AUTHOR]