Measuring carbon stock in peat soils - Balai Penelitian Tanah

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Agus et al. (2011)
S = Sequestration or CO uptake by plants = the time-averaged carbon
a 2
stock in the biomass and necromass of the succeeding plants (t/
ha) x 3.67. For example, if the time-averaged carbon stock from one
economic time cycle of 25 years of oil palm = 40 t/ha C, then for 6000
ha of land, its contribution in reducing CO in the atmosphere = 40 t/ha
2
C ha x 6000 x 3.67 t CO /C = 880 800 t CO .
2 2
Δt = The time period for the calculation, which depends on the purpose of
the analysis. It could be 1 minute or 1 hour in terms of gas flux, 1 year
or several years for plant growth, as long as all factors in the calculation
(Equation 10) use the same time period. For carbon trading, a long
time scale of, for example, 10–20 years, is normally used.
By using the above calculation and Table 5 for E bo , and combining them to
Equation [10], then
( E + E + E — S )
a bb bo a E =
t
E = (2,202,000 + 4,183,800 + 5,758,230 – 880,800) t CO /25 years
2
= 11,262,430 t CO 2 /25 yr/6,000 ha, and this is equivalent with
= 75 t CO 2 /ha/year
From this calculation it can be interpreted that about 11 million tonne (M t )
of CO 2 would be emitted within 25 years from the 6000 ha peat forest that
was converted to plantation. From the perspective of REDD, it can be stated
that about 11 Mt CO 2 /25 yr/6000 ha can be reduced by maintaining the peat
forest as is (by avoiding deforestation).