Carbon and nitrogen mineralization and persistence of organic residues under conservation and conventional tillage

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dc.contributor.authorMulvaney, Michael J.en
dc.contributor.authorWood, C. Wesleyen
dc.contributor.authorBalkcom, Kipling S.en
dc.contributor.authorShannon, D. A.en
dc.contributor.authorKemble, J. M.en
dc.contributor.departmentSustainable Agriculture and Natural Resource Management (SANREM) Knowledgebaseen
dc.coverage.spatialAlabamaen
dc.coverage.temporal2007 - 2008en
dc.date.accessioned2016-04-19T20:07:58Zen
dc.date.available2016-04-19T20:07:58Zen
dc.date.issued2010en
dc.descriptionMetadata only recorden
dc.description.abstractCombining high biomass cover crops with in situ organic mulches may achieve adequate weed control for no-till production, but the persistence and nutrient release rates from cover crops and mulches is unknown. This article describes carbon and nitrogen mineralization rates from three organic mulches (mimosa (Albizia julibrissin Durazz.), lespedeza (Lespedeza cuneata (Dum. Cours.) G. Don)), and oat (Avena sativa L.) straw) and one summer cover crop (soybean (Glycine max (L.) Merr.)). The experiment used litterbag methodology on a Wickham fine sandy loam in Tallassee, AL, USA. Litterbags containing the equivalent of 6.7 Mg ha-1 were placed on the soil surface (to represent conservation tillage) or buried at 10 cm depth (to represent conventional tillage) in October 2007 and retrieved periodically up to a year later. Soybean residue mineralized N at similar rates regardless of placement, but more N was potentially available from surface-placed residues than buried residues, showing that surface placed residues may act as a slow-release N fertilizer. Likewise, C was mineralized more rapidly from buried residues than surface-placed residues. The results quantify the increased amount of C that is sequestered when these residues are used in conservation tillage compared to conventional tillage. This research implies that the use of biomass cover crops and in situ organic mulches could have a measurable impact on carbon retention rates, which will reduce the amount of carbon being released into the atmosphere.en
dc.description.notesCCRA-9 (Soil Quality and Soil Carbon Sequestration)en
dc.format.mimetypetext/plainen
dc.identifier4727en
dc.identifier.citationAgronomy Journal 102(5): 1425-1433en
dc.identifier.doihttps://doi.org/10.2134/agronj2010.0129en
dc.identifier.issn0002-1962en
dc.identifier.issn1435-0645en
dc.identifier.urihttp://hdl.handle.net/10919/68963en
dc.language.isoen_USen
dc.publisherMadison, WI: American Society of Agronomyen
dc.rightsIn Copyrighten
dc.rights.holderCopyright 2010 by the American Society of Agronomyen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectCarbon sequestrationen
dc.subjectSoil conservationen
dc.subjectSoil fertilityen
dc.subjectNutrient recyclingen
dc.subjectSoilen
dc.subjectSustainable agricultureen
dc.subjectConservation tillageen
dc.subjectSoil organic matteren
dc.subjectAgricultureen
dc.subjectResidue decompositionen
dc.subjectField Scaleen
dc.titleCarbon and nitrogen mineralization and persistence of organic residues under conservation and conventional tillageen
dc.typeAbstracten
dc.type.dcmitypeTexten

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