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dc.contributor.authorSILVA, D. R. G.pt_BR
dc.contributor.authorMARCHI, G.pt_BR
dc.contributor.authorSPEHAR, C. R.pt_BR
dc.contributor.authorGUILHERME, L. R. G.pt_BR
dc.contributor.authorFAQUIN, V.pt_BR
dc.date.accessioned2013-06-05T11:11:11Zpt_BR
dc.date.available2013-06-05T11:11:11Zpt_BR
dc.date.created2013-06-05pt_BR
dc.date.issued2013pt_BR
dc.identifier.citationRevista Ciência Agronômica, v. 44, n. 2, p. 267-277, abr./jun. 2013.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/959400pt_BR
dc.descriptionThe aim of this study was to evaluate the effect of alternative sources of nutrients on the nutrition, yield and efficiency of potassium fertilization in lettuce. The experiment was carried out in a greenhouse, using 3.7 kg pots filled with a dystrophic red-yellow Latosol of medium texture. The experimental design was randomized, with treatments divided into a 4 x 6 factorial: four doses of potassium (0; 200; 400; 600 kg ha-1 K2O) and six alternative sources of nutrients (breccia, ultramafic, biotite schist, phlogopite, and mining and Chapada by-products), with four replications. Content and accumulation were determined for potassium (K), copper (Cu), zinc (Zn) and nickel (Ni) in the lettuce shoots, and from these data two indices were calculated for the efficiency of potassium as a fertilizer. The application of increasing values of alternative sources of nutrients promoted improvements in nutrition and increases in lettuce yield. The efficiency of potassium fertilization decreased with the increase in values of potassium taken from alternative nutrient sources, with the mining by-products and the ultramafic being superior to the other sources. Crushed silicate rocks and mining by-products can therefore both be used as fertilizer in organic and conventional production systems.eng
dc.language.isoengpt_BR
dc.rightsopenAccesspt_BR
dc.subjectRochas silicáticaspt_BR
dc.subjectSilicate rockspt_BR
dc.subjectMining by-productspt_BR
dc.titleAgronomic efficiency of potassium fertilization in lettuce fertilized with alternative nutrient sources.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2013-10-07T11:11:11Zpt_BR
dc.subject.thesagroAdubaçãopt_BR
dc.subject.thesagroAlfacept_BR
dc.subject.thesagroLactuca Sativapt_BR
dc.subject.nalthesaurusLettucept_BR
dc.subject.nalthesaurusFertilizerseng
riaa.ainfo.id959400pt_BR
riaa.ainfo.lastupdate2013-10-07pt_BR
dc.identifier.doihttps://doi.org/10.1590/S1806-66902013000200008eng
dc.contributor.institutionDOUGLAS RAMOS GUELFI SILVA, UNIVERSIDADE FEDERAL DE LAVRASpt_BR
dc.contributor.institutionGIULIANO MARCHI, CPACeng
dc.contributor.institutionCARLOS ROBERTO SPEHAReng
dc.contributor.institutionLUIZ ROBERTO GUIMARÃES GUILHERME, UNIVERSIDADE FEDERAL DE LAVRASeng
dc.contributor.institutionVALDEMAR FAQUIN, UNIVERSIDADE FEDERAL DE LAVRAS.eng
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