Residual and annual potassic fertilization for soybeans

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dc.contributor.authorRosolem, Ciro Antonio [UNESP]
dc.contributor.authorNakagawa, J.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:25:27Z
dc.date.available2014-05-20T15:25:27Z
dc.date.issued2001-01-01
dc.description.abstractThere is a lack of long-term research on potassium fertilization for soybean in the tropical and subtropical soils of Brazil and the residual effect of the fertilizer has generally not been considered. An experiment was conducted in plots that had been fertilized with 0, 40, 80, 160 and 240 kg ha(-1) of K2O for 3 years on a Dark Red Latosol, loamy sand (Acrortox). The effects of annual or residual fertilization with those rates of K were studied for three additional years. Potassium was supplied as potassium chloride or potassium sulphate. Soil and leaf samples were taken annually. There was a residual effect of the nutrient, which provided for high yields up to the 3rd year with the highest rate of K. In order to maintain the K contents of the soil in the medium range and obtain at least 90% of the maximum grain yield, an annual application of 80 kg ha(-1) of K2O was necessary, irrespectively of the source. The highest soybean yields were always associated with K levels above 15 mg kg(-1) in the leaves and 1.2 mmol(c) dm(-3) in the soil.en
dc.description.affiliationSão Paulo State Univ, Botucatu Coll Agr Sci, Dept Crop Sci, BR-18603970 Botucatu, SP, Brazil
dc.description.affiliationUnespSão Paulo State Univ, Botucatu Coll Agr Sci, Dept Crop Sci, BR-18603970 Botucatu, SP, Brazil
dc.format.extent143-149
dc.identifierhttp://dx.doi.org/10.1023/A:1017555023168
dc.identifier.citationNutrient Cycling In Agroecosystems. Dordrecht: Kluwer Academic Publ, v. 59, n. 2, p. 143-149, 2001.
dc.identifier.doi10.1023/A:1017555023168
dc.identifier.issn1385-1314
dc.identifier.lattes5720775873259528
dc.identifier.orcid0000-0003-2001-0874
dc.identifier.urihttp://hdl.handle.net/11449/35878
dc.identifier.wosWOS:000170945300005
dc.language.isoeng
dc.publisherKluwer Academic Publ
dc.relation.ispartofNutrient Cycling in Agroecosystems
dc.relation.ispartofjcr2.105
dc.relation.ispartofsjr0,895
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectexchangeable potassiumpt
dc.subjectfoliar diagnosispt
dc.subjectGlycine maxpt
dc.subjectpotassium sourcespt
dc.titleResidual and annual potassic fertilization for soybeansen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights
dcterms.rightsHolderKluwer Academic Publ
unesp.author.lattes5720775873259528[1]
unesp.author.orcid0000-0003-2001-0874[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agronômicas, Botucatupt
unesp.departmentProdução e Melhoramento Vegetal - FCApt

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Botucatu - FCA - Faculdade de Ciências Agronômicas