Título:	Bioavailability of soil Cu, Fe, Mn and Zn from soil fractions.
Autoria:	FONTES, R. L. F. FERREIRA, G. B. VENEGAS, V. H. A. NEVES, J. C. L. FARIA, A. F. de FONTES, M. P. F.
Afiliação:	RENILDES LÚCIO FERREIRA FONTES, UFV; GILVAN BARBOSA FERREIRA, CNPA; VICTOR HUGO ALVAREZ VENEGAS, UFV; JÚLIO CESAR LIMA NEVES, UFV; ARLINDO FERREIRA DE FARIA, UFV; MAURÍCIO PAULO FERREIRA FONTES, UFV.
Ano de publicação:	2021
Referência:	Semina: Ciências Agrárias, v. 42, n. 1, p. 19-42, jan./fev. 2021.
Conteúdo:	Cationic micronutrients bioavailability depends on the chemical characteristics of soil fractions. Fourteen soils received individual doses of five micronutrients (Cu, Fe, Mn, Zn, B) arranged in seven treatments set according a Baconian Matrix. The soils incubated with treatments during 15 days had corn cultivated in greenhouse for 30 days, in three consecutive growth cycles. The cationic micronutrients were determined in the corn shoots after each growth cycle. Soil samples collected before the first and after each growth cycle had the available concentrations of Cu, Fe, Mn and Zn determined by single extractions (Mehlich-1 and DTPA-pH 7.3) and by sequential extraction. Correlation analysis was performed for the Cu, Fe, Mn and Zn concentrations determined in the corn shoots, the available concentrations of Cu, Fe, Mn and Zn in the soils (Mehlich-1 and DTPA) and the concentrations of Cu, Fe, Mn and Zn in the soil fractions (sequential extraction). The distribution of available metals forms in fractions reflected their affinity with soil components. Soil available Cu correlated with Cu bound to organic matter. The exchangeable fraction was the main source of soil available Mn and Zn. The Fe availability related mainly to the Mn oxides, Fe oxides, and exchangeable fractions. The plants absorbed Cu mainly from the Mn-oxides and organic matter fractions. Manganese absorbed by plants originated from the exchangeable and Mn-oxides fractions. The Zn absorbed by plants originated mainly from the exchangeable fraction. Correlations of single metal extractions (Mehlich-1 and DTPA) with Cu, Mn and Zn contents in plants were positive.
Thesagro:	Bioquímica do Solo Nutrição Vegetal Matéria Orgânica Zea Mays Milho
NAL Thesaurus:	Organic compounds Metals Plant micronutrients
Palavras-chave:	Extração sequencial Micronutrientes catiônicos Cationic micronutrients Sequential extraction
ISSN:	1679-0359
Digital Object Identifier:	DOI: 10.5433/1679-0359.2021v42n1p19
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPA)