Potassium leaching from millet straw as affected by rainfall and potassium rates

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dc.contributor.authorRosolem, Ciro Antonio [UNESP]
dc.contributor.authorCalonego, Juliano Carlos [UNESP]
dc.contributor.authorFoloni, José S. S. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:21:20Z
dc.date.available2014-05-27T11:21:20Z
dc.date.issued2005-05-27
dc.description.abstractPearl millet (Penisetum glaucum) is an interesting species to be used as cover crop in tropical areas, showing a high ability in potassium uptake. Potassium (K) is not linked to organic compounds in the plant, and can easily be released from decaying straw becoming available for subsequent crops. This experiment evaluated K leaching from millet straw grown under potassium rates (0, 100, 200, and 300 mg dm-3), and submitted to five levels of simulated rain (5, 10, 20, 40, and 80 mm). Plants were grown in soil filled pots in a greenhouse. On the 50th day after emergence, the plants were desiccated with glyphosate. Artificial rain was applied over the straw. Potassium deficiency speeds up millet dehydration after herbicide application and increases lightly rain water retention in the straw. The amount of K leached right after plant desiccation is correlated with the residue nutrient content and can be as high as 64 kg ha-1 considering a mulch of 8 t ha -1. Although well-nourished millet plants release considerable amounts of K with the first rains, a large percentage of the nutrient is still retained in the straw. Copyright © Taylor & Francis, Inc.en
dc.description.affiliationDepartment of Crop Science College of Agricultural Sciences São Paulo State University, Botucatu, SP
dc.description.affiliationDepartment of Crop Science College of Agricultural Sciences São Paulo State University, C.P. 237, Botucatu 18603-970, SP
dc.description.affiliationUnespDepartment of Crop Science College of Agricultural Sciences São Paulo State University, Botucatu, SP
dc.description.affiliationUnespDepartment of Crop Science College of Agricultural Sciences São Paulo State University, C.P. 237, Botucatu 18603-970, SP
dc.format.extent1063-1074
dc.identifierhttp://dx.doi.org/10.1081/CSS-200050497
dc.identifier.citationCommunications in Soil Science and Plant Analysis, v. 36, n. 7-8, p. 1063-1074, 2005.
dc.identifier.doi10.1081/CSS-200050497
dc.identifier.issn0010-3624
dc.identifier.lattes5720775873259528
dc.identifier.orcid0000-0003-2001-0874
dc.identifier.scopus2-s2.0-18744410138
dc.identifier.urihttp://hdl.handle.net/11449/68246
dc.identifier.wosWOS:000229186500019
dc.language.isoeng
dc.relation.ispartofCommunications in Soil Science and Plant Analysis
dc.relation.ispartofjcr0.540
dc.relation.ispartofsjr0,341
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectCover crops
dc.subjectK fertilization
dc.subjectNutrient cycling
dc.subjectcover crop
dc.subjectleaching
dc.subjectpotassium
dc.subjectPenisetum
dc.subjectPenisetum glaucum
dc.subjectPennisetum glaucum
dc.titlePotassium leaching from millet straw as affected by rainfall and potassium ratesen
dc.typeArtigo
dcterms.licensehttp://journalauthors.tandf.co.uk/permissions/reusingOwnWork.asp
unesp.author.lattes5720775873259528[1]
unesp.author.orcid0000-0002-8950-3231[2]
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