Publication Details
Category Text Publication
Reference Category Journals
DOI 10.1080/10256010412331314265
Title (Primary) Incorporation of carbon originating from CO2 into different compounds of soil microbial biomass and soil organic matter
Author Miltner, A. ORCID logo ; Richnow, H.H.; Kopinke, F.-D.; Kästner, M.
Source Titel Isotopes in Environmental and Health Studies
Year 2005
Department ISOBIO; TUCHEM; UBT
Volume 41
Issue 2
Page From 135
Page To 140
Language englisch
Abstract In general, soils without the vegetation growing on them are regarded as sources of CO2. However, there are indications that CO2 is also fixed by soil microorganisms. Although this process is not significant from a quantitative point of view, it may change the isotopic composition of soil organic matter. Therefore, we conducted an incubation study with soil and 13C-labeled CO2 to investigate this process. We found that the label was transferred from CO2 into organic compounds in soil. At the end of a 61-day incubation period, 1.3 µmol C g-1 soil, corresponding to ~0.08% of the soil organic carbon, had been fixed. CO2 may, therefore, be an additional source of soil organic carbon. Compound-specific analysis of amino sugars, amino acids, and fatty acids indicated that the label is incorporated into microbial, mainly bacterial, biomass. All groups of microorganisms were involved in the assimilation of CO2, but the relatively high enrichment of mono-unsaturated and mid-chain branched fatty acids indicates that gram negative bacteria and actinomycetes may be slightly more important in this process than other groups of microorganisms.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=3623
Miltner, A., Richnow, H.H., Kopinke, F.-D., Kästner, M. (2005):
Incorporation of carbon originating from CO2 into different compounds of soil microbial biomass and soil organic matter
Isot. Environ. Health Stud. 41 (2), 135 - 140 10.1080/10256010412331314265