Measuring carbon stock in peat soils - Balai Penelitian Tanah

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Agus et al. (2011)
Analyzer (IRGA) or Gas Chromatography (GC)
o By using IRGA the gas from a closed chamber flows into the IRGA
(Figure 18) by using a pressure pump and CO concentration is
2
directly read by the IRGA every second for approximately 2.5
minutes. A linear relationship between time of observations with
the concentration of CO gas is used to calculate the CO flux to
2 2
the ground surface.
o If using a GC, the gas samples are collected from closed
chambers using syringes (Figure 19) and then the gas
concentration is measured by a GC (Hue et al. 2000).
Closed chamber
PC or data logger
Unit IRGA
Figure 18. Infra-Red Gas Analyzer (IRGA) and the closed chamber for measuring CO 2
gas flux emitted from the soil
Empirical relationship of land management and emissions
From a review of publications based on research in Sarawak, Malaysia, and
(mainly) Kalimantan, Indonesia, Hooijer et al. (2006, 2010) developed a linear
relationship between the depth of drainage, DD, and CO emissions:
2
E bo (t CO 2 /ha/yr) = 0,91 DD (cm) [11]