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dc.contributor.authorSOUZA, G. P. dept_BR
dc.contributor.authorFIGUEIREDO, C. C. dept_BR
dc.contributor.authorSOUSA, D. M. G. dept_BR
dc.date.accessioned2016-10-13T11:11:11Zpt_BR
dc.date.available2016-10-13T11:11:11Zpt_BR
dc.date.created2016-10-13pt_BR
dc.date.issued2016pt_BR
dc.identifier.citationScientia Agricola, Piracicaba, v. 73, n. 6, p. 535-542, Nov./Dec. 2016.pt_BR
dc.identifier.issn0103-9016pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1054545pt_BR
dc.descriptionABSTRACT: The study of labile carbon fractions (LCF) provides an understanding of the behavior of soil organic matter (SOM) under different soil management systems and cover crops. The aim of this study was to assess the effect of different soil management systems with respect to tillage, cover crop and phosphate fertilization on the amount of the LCF of SOM. Treatments consisted of conventional tillage (CT) and no-tillage (NT) with millet as the cover crop and a no-tillage system with velvet bean at two phosphorus dosages. Soil samples were collected and analyzed for organic carbon (OC), C oxidizable by KMnO4 (C-KMnO4), particulate OC (POC), microbial biomass carbon and light SOM in the 0.0-0.05, 0.05-0.10 and 0.10-0.20 m soil layers. The Carbon Management Index (CMI) was calculated to evaluate the impacts of soil management treatments on the quality of the SOM. The different LCFs are sensitive to different soil management systems, and there are significant correlations between them. C-KMnO4 is considered the best indicator of OC carbon lability. In the soil surface layers, the CT reduced the carbon content in all of the labile fractions of the SOM. The use of phosphorus led to the accumulation of OC and carbon in the different soil fractions regardless of the tillage system or cover crop. The application of phosphate fertilizer improved the ability of the NTsystem to promote soil quality, as assessed by the CMI.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectLabile organic matterpt_BR
dc.subjectPhosphorus fertilizationpt_BR
dc.subjectMatéria orgânica instávelpt_BR
dc.titleRelationships between labile soil organic carbon fractions under different soil management systems.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2016-12-13T11:11:11Zpt_BR
dc.subject.thesagroMateria orgânicapt_BR
dc.subject.thesagroSolopt_BR
dc.subject.thesagroFertilidade do solopt_BR
dc.subject.thesagroFósforopt_BR
dc.subject.nalthesaurussoil organic matterpt_BR
riaa.ainfo.id1054545pt_BR
riaa.ainfo.lastupdate2016-12-13pt_BR
dc.identifier.doihttp://dx.doi.org/10.1590/0103-9016-2015-0047pt_BR
dc.contributor.institutionGÉSSICA PEREIRA DE SOUZA, UNB; CÍCERO CÉLIO DE FIGUEIREDO, UNB; DJALMA MARTINHAO GOMES DE SOUSA, CPAC.pt_BR
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