ufz - centre for environmental research leipzig-halle
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EDistribution of carbon originating from CO2 on
different components of soil organic matterA. Miltner, H.-H. Richnow, F.-D. Kopinke and M. Kästner
Department of Remediation Research, UFZ - Centre for Environmental Research Leipzig - Halle, Permoserstr. 15, 04318 Leipzig, Germany
soil (ca. 21 g) + farmyard manure (5 mg g-1)
Na 2
13C
O3 +
H+
Na+
+ 1
3C
O2 +
H2O
CH
Cl 3
(fun
igat
ed c
ontr
ols
only
)
0.25 mmol 13CO2
Fig. 1: concentrations (A) and 13C (B) of phospholipid fatty acids
Fig. 2: concentrations (A) and 13C (B) of total fatty acids
atmosphere0.03% CO2
13C -7 ‰
soil organic matter13C -28 ‰
plants13C -28 ‰
soil air, 1 - 5% CO2, 13C -28 ‰
CO2 fixation
has been shown to
occur in soils, al-
though normally quan-
titatively less impor-
tant than respiration
is a process essential
to life
may have effect on
isotopic composition
of soil organic matter
may account for part
of the "bound residue"
formation as deter-
mined by studies with
radioactively labeled
compounds
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