Artículos de revistas
Avaliação de extratores de micronutrientes em solos do Paraná
Fecha
2011-11-01Registro en:
Revista Brasileira de Ciencia do Solo, v. 35, n. 6, p. 2093-2103, 2011.
0100-0683
1806-9657
10.1590/S0100-06832011000600024
2-s2.0-84856876001
Autor
West Paraná State University
Universidade Estadual Paulista (UNESP)
Institución
Resumen
In Brazil, plant-available micronutrients in the soil can be determined by several chemical extractants, the most common of which are dilute acid and chelating solutions. The purpose of this study was to assess the extractants 0.1 mol L -1 HCl, Mehlich -1, Mehlich-3 and DTPA for analysis of the micronutrients Cu, Zn, Fe, and Mn in soils from the state of Paraná. In samples from 12 soils (0-20 cm layer), wheat was planted (Triticum aestivum), grown for 42 days after emergence, and then bean (Phaseolus vulgaris) for 38 days. At the end of each planting period, the soil was sampled again. All extractants tested to assess the availability of Cu, Zn, Fe, and Mn correlated with each other. The efficiency of the extractants HCl, Mehlich-3 and DTPA in assessing plant-available Cu was similar, unlike Mehlich -1, which proved less efficient. The extractants HCl, Mehlich -1 and Mehlich-3 were less efficient in estimating plant-available Zn and Fe, and the most indicated extractant is DTPA. The efficiency of the extractants HCl, Mehlich -1, Mehlich-3 and DTPA in assessing plant-available Mn in soils from Paraná was similar.