Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/22083
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dc.contributor.authorWeng, Zhe Hanen
dc.contributor.authorVan Zwieten, Lukasen
dc.contributor.authorSingh, Bhupinder Palen
dc.contributor.authorKimber, Stephenen
dc.contributor.authorMorris, Stephenen
dc.contributor.authorCowie, Annetteen
dc.contributor.authorMacdonald, Lynne Men
dc.date.accessioned2017-10-30T11:16:00Z-
dc.date.issued2015-
dc.identifier.citationSoil Biology & Biochemistry, v.90, p. 111-121en
dc.identifier.issn1879-3428en
dc.identifier.issn0038-0717en
dc.identifier.urihttps://hdl.handle.net/1959.11/22083-
dc.description.abstractThere is a knowledge gap on biochar carbon (C) longevity and its priming effects on soil organic carbon (SOC) and recent root-derived C under field conditions. This knowledge would allow the potential of biochar in long-term soil C sequestration to be established. However, most studies on biochar C longevity and its priming effect have been undertaken in plant-free laboratory incubations. A 388 d field study was carried out in the presence of an annual ryegrass (C3) growing on a rhodic ferralsol with established C3/C4 plant-derived SOC (δ13C: -20.2‰) in a subtropical climate. A 13C-depleted hardwood biochar (δ13C: -35.7‰, produced at 450 °C) was applied at 0 and 30 dry t ha-1 and mixed into the top 100-mm soil profile (equivalent to 3% w/w). We report on the differentiation and quantification of root respiration and mineralisation of soil-C and biochar-C in the field. Periodic 13CO2 pulse labelling was applied to enrich δ13C of root respiration during two separate winter campaigns (δ13C: 151.5-184.6‰) and one summer campaign (δ13C: 19.8-31.5‰). Combined soil plus root respiration was separated from leaf respiration using a novel in-field respiration collar. A two-pool isotope mixing model was applied to partition three C sources (i.e. root, biochar and soil). Three scenarios were used to assess the sensitivity associated with the C source partitioning in the planted systems:1) extreme positive priming of recent SOC derived from the current ryegrass (C3) pasture;2) equivalent magnitude of priming of SOC and labile root C; and 3) extreme positive priming of the native C4-dominant SOC. We showed that biochar induced a significant negative priming of SOC in the presence of growing plants but no net priming was observed in the unplanted soil. We also demonstrated the importance of experimental timeframe in capturing the transient nature of biochar-induced priming, from positive (day 0-62) to negative (day 62-388). The presence/absence of plants had no impact on biochar-C mineralisation in this ferralsol during the measurement period. Based on a two-pool exponential model, the mean residence time (MRT) of biochar varied from 351 to 449 years in the intensive pasture system to 415-484 years in the unplanted soils.en
dc.languageenen
dc.publisherElsevier Ltden
dc.relation.ispartofSoil Biology & Biochemistryen
dc.titlePlant-biochar interactions drive the negative priming of soil organic carbon in an annual ryegrass field systemen
dc.typeJournal Articleen
dc.identifier.doi10.1016/j.soilbio.2015.08.005en
dc.subject.keywordsSoil Chemistry (excl. Carbon Sequestration Science)en
local.contributor.firstnameZhe Hanen
local.contributor.firstnameLukasen
local.contributor.firstnameBhupinder Palen
local.contributor.firstnameStephenen
local.contributor.firstnameStephenen
local.contributor.firstnameAnnetteen
local.contributor.firstnameLynne Men
local.subject.for2008050304 Soil Chemistry (excl. Carbon Sequestration Science)en
local.subject.seo2008961402 Farmland, Arable Cropland and Permanent Cropland Soilsen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emaillvanzwie@une.edu.auen
local.profile.emailbsingh20@une.edu.auen
local.profile.emailacowie4@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20171019-15400en
local.publisher.placeUnited Kingdomen
local.format.startpage111en
local.format.endpage121en
local.identifier.scopusid84939607839en
local.peerreviewedYesen
local.identifier.volume90en
local.contributor.lastnameWengen
local.contributor.lastnameVan Zwietenen
local.contributor.lastnameSinghen
local.contributor.lastnameKimberen
local.contributor.lastnameMorrisen
local.contributor.lastnameCowieen
local.contributor.lastnameMacdonalden
dc.identifier.staffune-id:lvanzwieen
dc.identifier.staffune-id:bsingh20en
dc.identifier.staffune-id:acowie4en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:22273en
local.identifier.handlehttps://hdl.handle.net/1959.11/22083en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitlePlant-biochar interactions drive the negative priming of soil organic carbon in an annual ryegrass field systemen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorWeng, Zhe Hanen
local.search.authorVan Zwieten, Lukasen
local.search.authorSingh, Bhupinder Palen
local.search.authorKimber, Stephenen
local.search.authorMorris, Stephenen
local.search.authorCowie, Annetteen
local.search.authorMacdonald, Lynne Men
local.uneassociationUnknownen
local.identifier.wosid000363075500013en
local.year.published2015en
local.subject.for2020410604 Soil chemistry and soil carbon sequestration (excl. carbon sequestration science)en
local.subject.seo2020180605 Soilsen
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