Assessment of micronutrient extractants from soils of Paraná, Brazil

Revista Brasileira de Ciência do Solo

Marcos Vinicius Mansano Sarto²  Fábio Steiner¹  Maria Do Carmo Lana² 

[1] ,West Paraná State UniversityMarechal Cândido Rondon PR ,Brazil

关键词: soil analysis;    correlation;    copper;    zinc;    iron;    manganese;    análise do solo;    correlação;    cobre;    zinco;    ferro;    manganês;   

DOI  :  10.1590/S0100-06832011000600024

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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