Impact of chars and readily available carbon on soil microbial respiration and microbial community composition in a dynamic incubation experiment

dc.bibliographicCitation.firstPage18
dc.bibliographicCitation.lastPage24
dc.bibliographicCitation.volume164
dc.contributor.authorLanza, Giacomo
dc.contributor.authorRebensburg, Philip
dc.contributor.authorKern, Jürgen
dc.contributor.authorLentzsch, Peter
dc.contributor.authorWirth, Stephan
dc.date.accessioned2017-08-02T12:25:32Z
dc.date.available2019-06-28T13:38:27Z
dc.date.issued2016
dc.description.abstractThe carbonisation of biomass and organic residues is discussed as an opportunity to store stabilised carbon compounds in soil and to reduce mineralisation and the emission of CO2. In this study, pyrolysis char (600 °C, 30 min) and hydrothermal carbonisation char (HTC char; 210 °C, 23 bar, 8 h), both derived from maize silage, were investigated in a short-term incubation experiment of soil mixtures with or without readily available carbon (glucose) in order to reveal impacts on soil microbial respiration and community composition. In contrast to pyrolysis char, the addition of HTC char increased respiration and enhanced the growth of fungi. The addition of glucose to soil-char mixtures containing either pyrolysis or HTC char induced an additional increase of respiration, but was 35% and 39% lower compared to soil-glucose mixtures, respectively, providing evidence for a negative priming effect. No significant difference was observed comparing the soil mixtures containing pyrolysis char + glucose and HTC char + glucose. The addition of glucose stimulated the growth of most microbial taxa under study, especially of Actinobacteria at the expense of fungi. Adding pyrolysis or HTC char to soil induced a decline of all microbial taxa but did not modify the microbial community structure significantly. Addition of pyrolysis or HTC char in combination with glucose however, increased the abundance of Actinobacteria and reduced the relative abundance of Acidobacteria and Betaproteobacteria while fungi were further increased in case of HTC char. We conclude that both chars hold the potential to bring about specific impacts on soil microbial activities and microbial community structure, and that they may compensate the variations induced by the addition of readily available carbon.eng
dc.description.versionpublishedVersioneng
dc.formatapplication/pdf
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/4588
dc.identifier.urihttps://doi.org/10.34657/284
dc.language.isoengeng
dc.publisherAmsterdam : Elseviereng
dc.relation.doihttps://doi.org/10.1016/j.still.2016.01.005
dc.relation.ispartofseriesSoil & Tillage Research, Volume 164, Page 18-24eng
dc.rights.licenseCC BY-NC-ND 4.0 Unportedeng
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/eng
dc.subjectCarbon turnovereng
dc.subjectHTC chareng
dc.subjectMicrobial communitieseng
dc.subjectPyrolysis chareng
dc.subjectShort-term studyeng
dc.subject.ddc630eng
dc.titleImpact of chars and readily available carbon on soil microbial respiration and microbial community composition in a dynamic incubation experimenteng
dc.typearticleeng
dc.typeTexteng
dcterms.bibliographicCitation.journalTitleSoil & Tillage Researcheng
tib.accessRightsopenAccesseng
wgl.contributorATBeng
wgl.contributorZALFeng
wgl.subjectLandwirtschafteng
wgl.typeZeitschriftenartikeleng
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