A comparison of the rhizosphere-based method with DTPA, EDTA, CaCl"2, and NaNO"3 extraction methods for prediction of bioavailability of metals in soil ... [An article from: Environmental Pollution] Review
A comparison of the rhizosphere-based method with DTPA, EDTA, CaCl"2, and NaNO"3 extraction methods for prediction of bioavailability of metals in soil ... [An article from: Environmental Pollution] Feature
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Description:
A rhizosphere-based method was compared with DTPA, EDTA, CaCl"2, and NaNO"3 extraction methods for the evaluation of bioavailability of heavy metals in soil to barley. The extractable amounts of Cr, Cu, Zn and Cd analyzed by the rhizosphere-based method correlated significantly with the metal content of barley roots. The extractable metals identified by DTPA, EDTA, CaCl"2 and NaNO"3 methods exhibited relatively poor or no correlation with the metal content of barley roots. The stepwise multiple regression equation of the rhizosphere-based method was the simplest one, as no soil properties needed to be entered, whereas the equations for the DTPA, EDTA, CaCl"2 and NaNO"3 extraction methods always require those variables. The most distinct feature of the rhizosphere-based method was that the proposed method was suitable for acidic, neutral and near alkaline soils. In contrast, the other extraction methods were restricted to soil types. In summary, the rhizosphere-based method is the most robust approach for evaluation of bioavailability of metals in soil to barley.
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