The use of carbon isotope ratios to evaluate legume contribution to soil enhancement in tropical pastures

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cg.coverage.countryColombiaen
cg.coverage.iso3166-alpha2COen
cg.coverage.regionSouth Americaen
cg.creator.identifierIdupulapati M. Rao: 0000-0002-8381-9358en
cg.identifier.doihttps://doi.org/10.1007/bf01347704en
cg.isijournalISI Journalen
cg.issn1573-5036en
cg.issue2en
cg.journalPlant and Soilen
cg.reviewStatusPeer Reviewen
cg.subject.ciatSOIL HEALTHen
cg.subject.ciatSOIL LANDSCAPESen
cg.subject.ciatTROPICAL FORAGESen
cg.subject.ilriFORAGESen
cg.volume162en
dc.contributor.authorRao, Idupulapati M.en
dc.contributor.authorAyarza, Miguel Angelen
dc.contributor.authorThomas, Richard J.en
dc.date.accessioned2014-10-02T08:33:23Zen
dc.date.available2014-10-02T08:33:23Zen
dc.identifier.urihttps://hdl.handle.net/10568/44183
dc.titleThe use of carbon isotope ratios to evaluate legume contribution to soil enhancement in tropical pasturesen
dcterms.abstractSoil carbon distribution with depth, stable carbon isotope ratios in soil organic matter and their changes as a consequence of the presence of legume were studied in three 12-year-old tropical pastures (grass alone Brachiaria decumbens (C4), legume alone Pueraria phaseoloides (C3) and grass + legume) on an Oxisol in Colombia. The objective of this study was to determine the changes that occurred in the13C isotope composition of soil from a grass + legume pasture that was established by cultivation of a native savanna dominated by C4 vegetation. The13C natural abundance technique was used to estimate the amount of soil organic carbon originating from the legume. Up to 29% of the organic carbon in soil of the grass + legume pasture was estimated to be derived from legume residues in the top 0 2-cm soil depth, which decreased to 7% at 8 10 cm depth. Improvements in soil fertility resulting from the soil organic carbon originated from legume residues were measured as increased potential rates of nitrogen mineralization and increased yields of rice in a subsequent crop after the grass + legume pasture compared with the grass-only pasture. We conclude that the13C natural abundance technique may help to predict the improvements in soil quality in terms of fertility resulting from the presence of a forage legume (C3) in a predominantly C4 grass pasture.en
dcterms.accessRightsLimited Accessen
dcterms.extentpp. 177-182en
dcterms.issued1994-05en
dcterms.languageenen
dcterms.licenseCopyrighted; all rights reserveden
dcterms.publisherSpringeren
dcterms.subjectfeed cropsen
dcterms.subjectbrachiaria decumbensen
dcterms.subjectpueraria phaseoloidesen
dcterms.subjectmixed pasturesen
dcterms.subjectsoil fertilityen
dcterms.subjectcarbonen
dcterms.subjectisotopesen
dcterms.subjectnitrogen fixationen
dcterms.subjectferralsolsen
dcterms.subjectsavannasen
dcterms.subjectpastizal mixtoen
dcterms.subjectfertilidad del sueloen
dcterms.subjectcarbonoen
dcterms.subjectisótoposen
dcterms.subjectfijación del nitrógenoen
dcterms.subjectferralsolesen
dcterms.subjectsabanasen
dcterms.typeJournal Articleen

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