Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/34832
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dc.creatorMartinez Gutierrez, Aaron-
dc.creatorResende, Álvaro Vilela de-
dc.creatorSilva, Carine Gregorio Machado-
dc.creatorMartins, Denize Carvalho-
dc.creatorSimão, Eduardo de Paula-
dc.creatorMoreira, Silvino Guimarães-
dc.creatorFerreira, Jose Paulo da Costa-
dc.date.accessioned2019-06-19T17:13:34Z-
dc.date.available2019-06-19T17:13:34Z-
dc.date.issued2018-
dc.identifier.citationMARTINEZ GUTIERREZ, A. et al. Uptake and exportation of micronutrients by transgenic cultivars of maize under no-tillage in the brazilian cerrado. Journal of Agricultural Science, [S.l.], v. 10, n. 9, p. 304-314, 2018. DOI: 10.5539/jas.v10n9p304.pt_BR
dc.identifier.urihttp://repositorio.ufla.br/jspui/handle/1/34832-
dc.description.abstractIntroducing cultivars of high productive potential with adequate agronomic management has contributed to the increase of maize yield in Brazil. This study aimed to characterize the extraction and exportation of micronutrients by modern maize hybrids grown in no-tillage system in the Cerrado region (Brazilian Savannah) with two fertilization levels. We established two crop environments with differentiated levels of soil fertilization, use of products for seed treatment and leaf fertilization, in which four transgenic hybrids were grown. For each environment, we used an experimental design of randomized blocks with four replicates. There were eleven plant samplings during the crop cycle to quantify dry mass production and Cu, Fe, Mn and Zn extraction. Micronutrient uptake is increased when a hybrid with higher potential for biomass production grows in an environment with greater supply of nutrients. Uptake persists throughout the maize cycle, including during the final stages of the reproductive phase, showing late demand for the crop. On average, after tasseling, about 39, 50, 42, and 49% of the total Cu, Fe, Mn and Zn absorption still occurs, respectively. Total uptake of Cu, Fe, Mn and Zn are, respectively, around 8, 199, 58 and 40 g to produce a tonne of grain, from which 23, 5, 8, and 42% are exported by the harvest. Micronutrient uptake and exportation rates for the studied transgenic hybrids are lower than the ones previously reported in Brazil and in works abroad.pt_BR
dc.languageen_USpt_BR
dc.publisherCanadian Center of Science and Education (CCSE)pt_BR
dc.rightsacesso abertopt_BR
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.sourceJournal of Agricultural Science (JAS)pt_BR
dc.subjectAbsorption marchpt_BR
dc.subjectHigh yieldpt_BR
dc.subjectNutritional requirementspt_BR
dc.subjectZea mays L.pt_BR
dc.titleUptake and exportation of micronutrients by transgenic cultivarspt_BR
dc.typeArtigopt_BR
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