Data/hora: 08/06/2024 05:36:33

Biblioteca(s): | Embrapa Algodão.
Data corrente: | 09/09/2022
Data da última atualização: | 09/09/2022
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.
Título: | Bioavailability of soil Cu, Fe, Mn and Zn from soil fractions.
Ano de publicação: | 2021
Fonte/Imprenta: | Semina: Ciências Agrárias, v. 42, n. 1, p. 19-42, jan./fev. 2021.
ISSN: | 1679-0359
DOI: | DOI: 10.5433/1679-0359.2021v42n1p19
Idioma: | Inglês
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.
Palavras-Chave: | Cationic micronutrients; Extração sequencial; Micronutrientes catiônicos; Sequential extraction.
Thesagro: | Bioquímica do Solo; Matéria Orgânica; Milho; Nutrição Vegetal; Zea Mays.
Thesaurus Nal: | Metals; Organic compounds; Plant micronutrients.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1146288/1/BIOAVAILABILITY-OF-SOIL.pdf
Registro original: | Embrapa Algodão (CNPA)
Exemplares: | CNPA - (28925-1) - UPC - AP - DD -  -  -  - DIS