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dc.contributor.authorFontoura, Sandra Mara Vieirapt_BR
dc.contributor.authorViero, Fernandopt_BR
dc.contributor.authorMoraes, Renato Paulo dept_BR
dc.contributor.authorBayer, Cimeliopt_BR
dc.date.accessioned2018-11-28T02:45:30Zpt_BR
dc.date.issued2017pt_BR
dc.identifier.issn0100-0683pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/185154pt_BR
dc.description.abstractHigh winter cereal yields depend on an adequate supply of nitrogen (N). We developed a system for indicating N rates for wheat and barley in the South-Central region of the state of Paraná, Brazil, using results of 72 field experiments conducted from 2007 to 2012. The N rates recommended for winter cereals were estimated to supply the amounts of N fertilizer needed to obtain increasing yields (<3.5, 3.5-4.5, 4.5-5.5, and >5.5 Mg ha-1) of crops grown after soybean and corn on soils with a variable organic matter content (<40, 40-60, and >60 g dm-3). The apparent mineralization rate of soil N was estimated to be 1 % and the N fertilization efficiency 50 %. The N rates recommended for wheat ranged from 30 to 150 kg ha-1 when cultivated after soybean, and from 30 to 170 kg ha-1 after corn. The N rates for barley ranged from 30 to 120 kg ha-1 when grown after soybean, and from 30 to 130 kg ha-1 after corn. These N rates are consistent with those indicated by the Soil Fertility Commission for the states of Rio Grande do Sul and Santa Catarina (CQFS-RS/SC, 2016), and also with the rates of maximum economic efficiency estimated in our study. The proposed N rate recommendation system can be used by agricultural technicians and producers to manage N fertilization of wheat and barley in the South-Central region of Paraná, Brazil.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofRevista brasileira de ciencia do solo. Viçosa. Vol. 41 (nov. 2017), [art.] e0170009, 16 p.pt_BR
dc.rightsOpen Accessen
dc.subjectTriticum aestivumen
dc.subjectTrigopt_BR
dc.subjectCevadapt_BR
dc.subjectHordeum vulgare L.en
dc.subjectAdubação nitrogenadapt_BR
dc.subjectN indicationen
dc.subjectUreaen
dc.subjectCultura de invernopt_BR
dc.subjectFertilidade do solopt_BR
dc.subjectPlantio diretopt_BR
dc.titleNitrogen fertilization of no-tillage winter cereals in the south-central region of Paraná, Brazilpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001079506pt_BR
dc.type.originNacionalpt_BR


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