Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1013554
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dc.contributor.authorCARVALHO, A. M. dept_BR
dc.contributor.authorMARCHAO, R. L.pt_BR
dc.contributor.authorBUSTAMANTE, M. M. da C.pt_BR
dc.contributor.authorALCANTARA, F. A. dept_BR
dc.contributor.authorCOSER, T. R.pt_BR
dc.date.accessioned2015-04-15T11:11:11Zpt_BR
dc.date.available2015-04-15T11:11:11Zpt_BR
dc.date.created2015-04-15pt_BR
dc.date.issued2014pt_BR
dc.identifier.citationRevista Ciência Agronômica, v. 45, n. 5, p. 968-975, 2014.pt_BR
dc.identifier.issn1806-6690pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1013554pt_BR
dc.descriptionThe objective of this study was to investigate the chemical composition of cover crops by solid-state CPMAS 13C NMR spectroscopy and its effects on carbon, nitrogen and phosphorus in a Typic Acrustox. Cover crops (Crotalaria juncea, Canavalia brasiliensis, Cajanus cajan, Mucuna pruriens and Raphanus sativus) and natural fallow were studied in rotation with maize under conventional and no-tillage regimes. Tissues of Crotalaria juncea, Canavalia brasiliensis, Mucuna pruriens and Raphanus sativus were analyzed using CPMAS 13C NMR spectroscopy. Soil samples were collected at the end of the growing season of the cover crops (September 2002) and during the grain filling period in corn from 0-5 and 5-10 cm layers. Cajanus cajan presented the lowest content of polysaccharides and along with Mucuna pruriens presented the highest percentage of aromatic carbon compounds, reflecting the slow decomposition of highly lignified material. Carbon stocks were higher in the superficial soil layer and under no-tillage due to the accumulation and slower decomposition of plant tissues under these conditions. Increases in the C/N ratio of the soil with Mucuna pruriens and the C/P ratio with Cajanus cajan in the dry season were also related to slower rates of decomposition, caused by the large concentration of aromatic compounds in the tissues of these species. The higher C/P ratios found at 0-5 cm layer are due to higher values of P (Mehlich-1) at 5-10 cm (25 mg kg-1) layer and the higher concentration of carbon in the superficial soil layer as a result of the accumulation of plant residues.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectRessonância magnetica nuclearpt_BR
dc.subjectLatossolo Vermelho-Amarelopt_BR
dc.titleCharacterization of cover crops by NMR spectroscopy: impacts on soil carbon, nitrogen and phosphorus under tilage regimes.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2015-04-15T11:11:11Zpt_BR
dc.subject.thesagroCerradopt_BR
dc.subject.thesagroCarbonopt_BR
dc.subject.thesagroMatéria Orgânicapt_BR
dc.subject.thesagroPlanta de Coberturapt_BR
riaa.ainfo.id1013554pt_BR
riaa.ainfo.lastupdate2015-04-15pt_BR
dc.contributor.institutionARMINDA MOREIRA DE CARVALHO, CPAC; ROBELIO LEANDRO MARCHAO, CPAC; MERCEDES MARIA DA CUNHA BUSTAMANTE; FLAVIA APARECIDA DE ALCANTARA, CNPAF; THAIS RODRIGUES COSER.pt_BR
Aparece nas coleções:Artigo em periódico indexado (CNPAF)

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