dc.contributor.author | Weng, Zhe Han | |
dc.contributor.author | Van Zwieten, Lukas | |
dc.contributor.author | Singh, Bhupinder Pal | |
dc.contributor.author | Tavakkoli, Ehsan | |
dc.contributor.author | Kimber, Stephen | |
dc.contributor.author | Morris, Stephen | |
dc.contributor.author | Macdonald, Lynne M | |
dc.contributor.author | Cowie, Annette | |
dc.date.accessioned | 2020-02-14T03:43:35Z | |
dc.date.available | 2020-02-14T03:43:35Z | |
dc.date.issued | 2018 | |
dc.identifier.issn | 0038-0717 | |
dc.identifier.doi | 10.1016/j.soilbio.2017.12.008 | |
dc.identifier.uri | http://hdl.handle.net/10072/391491 | |
dc.description.abstract | Organo-mineral interactions control the stabilisation of soil organic matter (SOM) in mineral soils. Biochar can enhance these interactions via a range of mechanisms including Al-dominant cation bridging in acidic soils, ligand exchange, H-bonding, and π- π-bonding with polycyclic aromatics. But, field-based evidence of their magnitude is lacking. Here we assessed the role of organo-mineral interactions on the observed biochar-induced negative priming of native soil organic carbon (SOC) in a Ferralsol under annual ryegrass. Using repeated pulse labelling, the magnitude of production and fate of recently photosynthesised 13C was traced amongst: soil plus root respiration, root biomass, soil aggregates and aggregate-associated C fractions. Biochar (Eucalyptus saligna, 450 °C) amendment (30 Mg ha−1) increased total belowground 13C recovery by 10% compared to the unamended control over the 12 month sampling period. We detected the greatest quantity of rhizodeposit in the mineral-protected SOM within macroaggregates (250–2000 μm). Through synchrotron-based spectroscopic analysis of bulk soils, we provide evidence of a mechanism for biochar-induced negative priming which is the accumulation of rhizodeposits in organo-mineral (i.e. aggregate-protected and silt/clay-bound) fractions. | |
dc.description.peerreviewed | Yes | |
dc.language | English | |
dc.language.iso | eng | |
dc.publisher | Elsevier | |
dc.relation.ispartofpagefrom | 91 | |
dc.relation.ispartofpageto | 96 | |
dc.relation.ispartofjournal | Soil Biology and Biochemistry | |
dc.relation.ispartofvolume | 118 | |
dc.subject.fieldofresearch | Environmental sciences | |
dc.subject.fieldofresearch | Biological sciences | |
dc.subject.fieldofresearch | Agricultural, veterinary and food sciences | |
dc.subject.fieldofresearchcode | 41 | |
dc.subject.fieldofresearchcode | 31 | |
dc.subject.fieldofresearchcode | 30 | |
dc.subject.keywords | Science & Technology | |
dc.subject.keywords | Life Sciences & Biomedicine | |
dc.subject.keywords | Soil Science | |
dc.subject.keywords | Agriculture | |
dc.subject.keywords | Negative priming | |
dc.title | The accumulation of rhizodeposits in organo-mineral fractions promoted biochar-induced negative priming of native soil organic carbon in Ferralsol | |
dc.type | Journal article | |
dc.type.description | C1 - Articles | |
dcterms.bibliographicCitation | Weng, ZH; Van Zwieten, L; Singh, BP; Tavakkoli, E; Kimber, S; Morris, S; Macdonald, LM; Cowie, A, The accumulation of rhizodeposits in organo-mineral fractions promoted biochar-induced negative priming of native soil organic carbon in Ferralsol, Soil Biology and Biochemistry, 2018, 118, pp. 91-96 | |
dc.date.updated | 2020-02-14T03:42:13Z | |
gro.hasfulltext | No Full Text | |
gro.griffith.author | Van Zwieten, Lukas | |