Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/979670
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dc.contributor.authorCASTRO, R. C. dept_BR
dc.contributor.authorBENITES, V. de M.pt_BR
dc.contributor.authorTEIXEIRA, P. C.pt_BR
dc.contributor.authorOLIVEIRA, D. F. dept_BR
dc.contributor.authorOLIVEIRA, L. F. dept_BR
dc.contributor.authorANJOS, M. J. dospt_BR
dc.date.accessioned2014-02-12T11:11:11Zpt_BR
dc.date.available2014-02-12T11:11:11Zpt_BR
dc.date.created2014-02-12pt_BR
dc.date.issued2013pt_BR
dc.identifier.citationIn: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE/INAC, 2013. Recife/PE. Anais... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2013.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/979670pt_BR
dc.descriptionPhosphorus is an essential nutrient for plant growth. Million of tones of P are applied to the soils annually. However, only a small fraction of the P applied with fertilizers is taken up by crops in the year of application, and the effectiveness of any residual P fertilizer declines with time. To improve our understanding of the mechanisms underlying this response to P in the field, we have studied the mobility of P from 3 different fertilizes: monoammonium phosphate (MAP), polymer coated monoammonium phosphate (MAPp) and Organomineral phosphate (OMP) applied on high weathered soil samples in a Petri dish experiment. Total Reflection X-Ray Fluorescence (TXRF) was used to determine the P diffusive flux at different distances (0 - 7.5, 7.5 ? 13.5, 13.5 ? 25.5 and 25.5 ? 43 mm) from granular fertilizer. TXRF analyses were performed at the X-Ray Fluorescence Beamline D09B at Brazilian National Synchrotron Light Laboratory (LNLS), in Campinas, São Paulo, using a polychromatic beam with maximum energy of 20 keV for the excitation and an Ultra-LEGe detector with resolution of 148 eV at 5.9 keV. Besides that, the detections were performed in a high vacuum chamber (2.5 x 10-5 mbar) to avoid air absorption. After a period of five weeks, the total P concentration increased in the soil sampled 7.5 to 13.5 mm from the fertilizer showing a diffusive flux of P. About 20% (considering MAP and MAPp) of the total P applied diffused out of the central soil ring. Different sources showed differences in diffusive flux of P. Soil pH also influenced diffusive flux of P showing higher flux on lower pH soils.pt_BR
dc.language.isoporpt_BR
dc.rightsopenAccesspt_BR
dc.titleAnalyzing the mobility in granular forms of P fertilizer in brazilians soils under laboratory conditions.pt_BR
dc.typeArtigo em anais e proceedingspt_BR
dc.date.updated2015-03-31T11:11:11Zpt_BR
dc.subject.nalthesaurusphosphoruspt_BR
dc.format.extent28p.pt_BR
riaa.ainfo.id979670pt_BR
riaa.ainfo.lastupdate2015-03-31pt_BR
dc.contributor.institutionRobson C. de Castro, Instituto de Física Armando Dias Tavares; VINICIUS DE MELO BENITES, CNPS; PAULO CESAR TEIXEIRA, CNPS; Davi Ferreira de Oliveira, Instituto de Física Armando Dias Tavares; Luis Fernando de Oliveira, Instituto de Física Armando Dias Tavares; Marcelino José dos Anjos, Instituto de Física Armando Dias Tavares.pt_BR
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