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dc.contributor.authorBahadori, Mohammad
dc.contributor.authorChen, Chengrong
dc.contributor.authorLewis, Stephen
dc.contributor.authorBoyd, Sue
dc.contributor.authorRashti, Mehran Rezaei
dc.contributor.authorEsfandbod, Maryam
dc.contributor.authorGarzon-Garcia, Alexandra
dc.contributor.authorVan Zwieten, Lukas
dc.contributor.authorKuzyakov, Yakov
dc.date.accessioned2021-02-04T02:09:43Z
dc.date.available2021-02-04T02:09:43Z
dc.date.issued2021
dc.identifier.issn0048-9697
dc.identifier.doi10.1016/j.scitotenv.2021.145307
dc.identifier.urihttp://hdl.handle.net/10072/401622
dc.description.abstractSoil organic matter (SOM) formation involves microbial transformation of plant materials of various quality with physico-chemical stabilisation via soil aggregation. Land use and vegetation type can affect the litter chemistry and bioavailability of organic carbon (OC), and consequently influence the processing and stabilisation of OC into SOM. We used 13C nuclear magnetic resonance (13C NMR) and hot-water extraction to assess the changes in chemical composition and labile OC fractions during the transformation processes from leaf to litter to SOM depending on land use and vegetation type. The hot-water-extractable OC (HWEOC) decreased from leaf (43–65 g kg−1) to litter (19–23 g kg−1) to SOM (8–16 g kg−1) similar in four land use types: grassland, sugarcane, forest and banana. These trends demonstrated the uniform converging pathways of OC transformation and increasing stability by SOM formation. The preferential decomposition and decrease of labile OC fractions (∑% di-O-alkyl, O-alkyl and methoxyl) from leaf (54–69%) to SOM (41–43%) confirmed the increasing stability of the remaining compounds. Despite differences in the biochemical composition of the leaf tissues among the vegetation types, the proportions of labile OC fractions in SOM were similar across land uses. The OC content of soil was higher in forest (7.9%) and grassland (5.2%) compared to sugarcane (2.3%) and banana (3.0%). Consequently, the HWEOC per unit of soil weight was higher in forest and grassland (2.0 and 1.2 g kg−1 soil, respectively) compared to sugarcane and banana (0.3 and 0.4 g kg soil−1, respectively). The availability of labile SOM is dependent on the quantity of SOM not the chemical composition of SOM. In conclusion, labile OC fractions in SOM, as identified by 13C NMR, were similar across land use regardless of vegetation type and consequently, SOM formation leads to convergence of chemical composition despite diversity of OC sources.
dc.description.peerreviewedYes
dc.description.sponsorshipGreat Barrier Reef Marine Park Authority
dc.languageen
dc.publisherElsevier BV
dc.relation.ispartofpagefrom145307
dc.relation.ispartofjournalScience of The Total Environment
dc.relation.ispartofvolume770
dc.subject.fieldofresearchSoil sciences
dc.subject.fieldofresearchTerrestrial ecology
dc.subject.fieldofresearchcode4106
dc.subject.fieldofresearchcode310308
dc.titleSoil organic matter formation is controlled by the chemistry and bioavailability of organic carbon inputs across different land uses
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationBahadori, M; Chen, C; Lewis, S; Boyd, S; Rashti, MR; Esfandbod, M; Garzon-Garcia, A; Van Zwieten, L; Kuzyakov, Y, Soil organic matter formation is controlled by the chemistry and bioavailability of organic carbon inputs across different land uses, Science of The Total Environment, 2021, 770, pp. 145307
dcterms.licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.date.updated2021-02-02T00:33:03Z
dc.description.versionAccepted Manuscript (AM)
gro.rights.copyright© 2021 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
gro.hasfulltextFull Text
gro.griffith.authorRezaei Rashti, Mehran
gro.griffith.authorChen, Chengrong


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