Soil carbon as affected by cover crops under no-till under tropical climate

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dc.contributor.authorRosolem, C. A. [UNESP]
dc.contributor.authorLi, Y.
dc.contributor.authorGarcia, R. A.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Florida
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.date.accessioned2018-11-26T17:16:38Z
dc.date.available2018-11-26T17:16:38Z
dc.date.issued2016-12-01
dc.description.abstractIn tropical, low-fertility soils, crop yields are dependent on soil carbon, and cropping systems under no-till can increase soil C stocks. Plant residues supplied by cover crops in no-till systems may improve aggregate stability and soil carbon, which may be further increased with the introduction of a legume in the cropping system. This research studied the effects of cover crops in rotation with soybean under no-till on soil carbon and nitrogen, in Botucatu, Brazil, for 3 yr. The cover crops were millet (Penninsetum americanum Leek), cober crop (Sorghum bicolor 9 Sorghum sudanense) and sunn hemp (Crotalaria juncea L.), grown in the spring. Fallow without cover crops was used as a control. Grain sorghum (Sorghum bicolor L. Moench) and soybean (Glycine max (L.) Merril) were grown in fall-winter and summer, respectively. Generally, cover crops increased soil carbon contents, but soil N was only increased by sunn hemp in the particulate organic C fraction. An increase in the labile carbon fraction in the topsoil layers was closely related to cover crop root development. Fallow in spring should not be recommended in degraded soils with lowcarbon stock. Labile-fractioned soil organic carbon and total carbon levels are more efficiently increased by grasses than by legumes in the short term, and grasses cropped in spring increase soil C/N ratio. Conversely, the introduction of a legume (sunn hemp) maintained a more stable C/N ratio, that is around 10, which would be more effective in increasing soil C in the long term.en
dc.description.affiliationSao Paulo State Univ, Dept Crop Sci, Coll Agr Sci, Jose Barbosa de Barros St 1780, BR-18603970 Botucatu, SP, Brazil
dc.description.affiliationUniv Florida, Inst Food & Agr Sci, Ctr Trop Res & Educ, Dept Soil & Water Sci, Homestead, FL 33031 USA
dc.description.affiliationEmbrapa Western Reg Agr, Br 163,Km 253,6, BR-79804970 Dourados, MS, Brazil
dc.description.affiliationUnespSao Paulo State Univ, Dept Crop Sci, Coll Agr Sci, Jose Barbosa de Barros St 1780, BR-18603970 Botucatu, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent495-503
dc.identifierhttp://dx.doi.org/10.1111/sum.12309
dc.identifier.citationSoil Use And Management. Hoboken: Wiley-blackwell, v. 32, n. 4, p. 495-503, 2016.
dc.identifier.doi10.1111/sum.12309
dc.identifier.issn0266-0032
dc.identifier.lattes5720775873259528
dc.identifier.orcid0000-0003-2001-0874
dc.identifier.urihttp://hdl.handle.net/11449/162424
dc.identifier.wosWOS:000393368200004
dc.language.isoeng
dc.publisherWiley-Blackwell
dc.relation.ispartofSoil Use And Management
dc.relation.ispartofsjr0,733
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectCarbon C
dc.subjectcarbon storage
dc.subjectcrop rotation
dc.subjectland use
dc.subjectnitrogen N
dc.subjectsoil carbon dynamics
dc.titleSoil carbon as affected by cover crops under no-till under tropical climateen
dc.typeArtigo
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dcterms.rightsHolderWiley-Blackwell
unesp.author.lattes5720775873259528[1]
unesp.author.orcid0000-0003-2001-0874[1]
unesp.departmentProdução e Melhoramento Vegetal - FCApt

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Botucatu - FCA - Faculdade de Ciências Agronômicas