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Campo DCValorIdioma
dc.contributor.authorNascente, Adriano Stephan-
dc.contributor.authorLi, Yuncong C.-
dc.contributor.authorCrusciol, Carlos Alexandre Costa-
dc.date.accessioned2014-05-27T11:29:35Z-
dc.date.accessioned2016-10-25T18:48:57Z-
dc.date.available2014-05-27T11:29:35Z-
dc.date.available2016-10-25T18:48:57Z-
dc.date.issued2013-06-01-
dc.identifierhttp://dx.doi.org/10.1016/j.still.2013.02.008-
dc.identifier.citationSoil and Tillage Research, v. 130, p. 52-57.-
dc.identifier.issn0167-1987-
dc.identifier.urihttp://hdl.handle.net/11449/75528-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/75528-
dc.description.abstractPhysical fractions (free light fraction, intra-aggregate light fraction and heavy fraction) of soil organic matter (SOM) are good indicators of soil quality for sustainable land use. The objective of this study was to evaluate the effect of cover crops on total organic carbon (TOC) and physical fractions of soil organic matter in soil under a no-tillage system (NTS) and a conventional tillage system (CTS, one plowing and two disking). A three-year field experiment was carried out as a cover crop-rice (Oryza sativa)-cover crop-rice rotation. Treatments included cover crops (Panicum maximum, Brachiaria ruziziensis, Brachiaria brizantha, and pearl millet (Pennisetum glaucum), fallow, till or no till. The SOM was physically fractionated in free light fraction (FLF), intra-aggregates light fraction (IALF) and heavy fraction (HF). The levels of C in whole soil were also evaluated, as well as C in the light fractions (FLF+IALF) and in the HF. Results indicated that concentrations of C in the FLF and IALF in surface soils (0-0.05m) were much higher (10.8 and 1.95gkg-1, respectively) than that in the 0.05-0.1m soil depth (7.68 and 1.54gkg-1, respectively) and in the 0.1-0.2m soil depth (4.98 and 1.24gkg-1, respectively). The NTS resulted in higher levels of FLF (12.2gkg-1) and IALF (2.19gkg-1) than with CTS (1.37-7.30gkg-1). Millet had the highest C (19.5gkg-1) and N (1.1gkg-1) concentrations in soil. There was an accumulation of TOC and total N in the surface soil with cover crops, and concentrations of TOC were higher in the HF (79.0%) than in the light fractions (21.0%). Although SOM changed little during the two years of this experiment, the various C fractions were significantly affected by the tillage treatments. We conclude that SOM physical fractionation allowed seeing significant differences caused by the soil management in the organic matter dynamics in a short period of time. © 2013 Elsevier B.V.en
dc.format.extent52-57-
dc.language.isoeng-
dc.sourceScopus-
dc.subjectBrachiaria brizantha-
dc.subjectBrachiaria ruziziensis-
dc.subjectMillet-
dc.subjectPanicum maximum-
dc.subjectSoil management-
dc.subjectAggregates-
dc.subjectAgricultural machinery-
dc.subjectAgronomy-
dc.subjectBiogeochemistry-
dc.subjectBiological materials-
dc.subjectCrops-
dc.subjectCultivation-
dc.subjectOrganic compounds-
dc.subjectPlants (botany)-
dc.subjectSoils-
dc.subjectSoil pollution-
dc.subjectconservation tillage-
dc.subjectcover crop-
dc.subjectfallow-
dc.subjectgrass-
dc.subjectland use change-
dc.subjectmillet-
dc.subjectplowing-
dc.subjectrice-
dc.subjectsoil aggregate-
dc.subjectsoil depth-
dc.subjectsoil management-
dc.subjectsoil organic matter-
dc.subjectsoil quality-
dc.subjectsoil surface-
dc.subjectsustainability-
dc.subjecttotal organic carbon-
dc.subjectzero tillage-
dc.titleCover crops and no-till effects on physical fractions of soil organic matteren
dc.typeoutro-
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)-
dc.contributor.institutionTropical Research and Education Center-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationBrazilian Agricultural Research Corporation (EMBRAPA) Rice and Beans Research Center, Santo Antonio de Goiás, GO-
dc.description.affiliationUniversity of Florida Soil and Water Science Department Tropical Research and Education Center, Homestead, FL-
dc.description.affiliationSão Paulo State University (UNESP) College of Agricultural Sciences Department of Crop Science, Lageado Experimental Farm, Botucatu, São Paulo-
dc.description.affiliationUnespSão Paulo State University (UNESP) College of Agricultural Sciences Department of Crop Science, Lageado Experimental Farm, Botucatu, São Paulo-
dc.identifier.doi10.1016/j.still.2013.02.008-
dc.identifier.wosWOS:000318889100007-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofSoil and Tillage Research-
dc.identifier.scopus2-s2.0-84875116839-
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