A comparison of the rhizosphere-based method with DTPA, EDTA, CaCl2, and NaNO3 extraction methods for prediction of bioavailability of metals in soil to barley

Feng, Ming; Shan, Xiao-quan; Zhang, Shuzhen; Wen, Bin

doi:10.1016/j.envpol.2005.02.003

Cited by 254 publications

(114 citation statements)

References 44 publications

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“…2), which directly results in the approximate correlation coefficients obtained from both soil fractions ( Table 3) and indicates that both bulk and rhizosphere soils are equally suitable for assessing metal phytoavailability, especially for A-RHIZO and RHIZO methods. This is in contrast with previous results obtained by Feng et al (2005b). This may be due to difference in plant species (wheat versus barley) and growth conditions (greenhouse versus field).…”

Section: Bulk Soils Versus Rhizosphere Soilscontrasting

confidence: 56%

Is an adjusted rhizosphere-based method valid for field assessment of metal phytoavailability? Application to non-contaminated soils

Fang

Wen

Shan

et al. 2007

Environmental Pollution

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An adjusted-RHIZO method was the most promising approach for predicting metal phytoavailability to wheat under field conditions. AbstractPreviously recommended rhizosphere-based method (RHIZO) applied to moist rhizosphere soils was integrated with moist bulk soils, and termed adjusted-RHIZO method (A-RHIZO). The A-RHIZO and RHIZO methods were systematically compared with EDTA, DTPA, CaCl 2 and the first step of the Community Bureau of Reference (BCR1) methods for assessing metal phytoavailability under field conditions. Results suggested that moist bulk soils are equally suited or even better than rhizosphere soils to estimate metal phytoavailability. The A-RHIZO method was preferred to other methods for predicting the phytoavailability of Ni, Cu, Zn, Cd, Pb and Mn to wheat roots with correlation coefficients of 0.730 (P < 0.001), 0.854 (P < 0.001), 0.887 (P < 0.001), 0.739 (P < 0.001), 0.725 (P < 0.001) and 0.469 (P < 0.05), respectively. When including soil properties, other extraction methods were also able to predict phytoavailability reasonably well for some metals. Soil pH, organic matter and FeeMn oxide contents, and cation-exchange capacity mostly influenced the extraction and phytoavailability of metals.

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Section: Bulk Soils Versus Rhizosphere Soilscontrasting

confidence: 56%

Is an adjusted rhizosphere-based method valid for field assessment of metal phytoavailability? Application to non-contaminated soils

Fang

Wen

Shan

et al. 2007

Environmental Pollution

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“…Apesar de o DTPA ter apresentado uma ligeira superioridade entre os métodos de extração avaliados, vários autores não encontraram correlação significativa entre os teores de Pb na planta e os teores no solo extraído com DTPA (ANDRADE et al, 2009;ANJOS;MAGALHÃES e ABREU 2012;FENG et al, 2005). Solo, v. 29, n. 6, p. 977-985, 2005. …”

Section: Resultsunclassified

Bioavailability of lead using chemical extractants in soil treated with humic acids and activated carbon

Santos

Accioly

Nascimento

et al. 2015

Revista Ciência Agronômica

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-Soil contamination by lead in the town of Santo Amaro, in the state of Bahia, Brazil, originated with the installation of a metal plant in the city in the 1960s, and poses a serious risk to the local population. Determination of the available Pb levels in the soil is an important tool in monitoring the risks of this contamination. However, different methods are used to determine the available Pb content of the soil, resulting in differing values for the extractants. The aim of the present work was to compare the efficiency of extraction using Mehlich 1, DTPA and CaCl 2 solutions in the evaluation of Pb availability in soil treated with different soil amendments. The soil sample used in the experiment was collected near the metal plant. The dosages of soil amendments were set up based on the carbon content of the materials (compost humic acid, commercial humic acid and charcoal), being: 0, 0.75, 1.5, 3 and 7.5 g C kg -1 . The available Pb content was extracted by Mehlich 1, DTPA pH 7.3 and CaCl 2 10 mmol L -1 . Soil fractionation was carried out to determine the metal attached to the exchangeable and organic matter fractions of the soil. The addition of AHv reduced the Pb content of the soil by 60, 89 and 47% for extractions carried out with Mehlich 1, CaCl 2 and DTPA respectively. The Pb content of the organic matter fraction was directly proportional to the dosages of soil amendments. The three extractants under evaluation were efficient in predicting the available Pb content.

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“…Researchers have found that low-molecular-weight organic acids in the rhizosphere are capable of forming complexes with metal ions in solution and thus enhance the metals' mobilization and uptake by plants (Mench and Martin, 1991;Awad et al, 1994;Krishnamurti et al, 1997;Veeken and Hamelers, 1999;Chen et al, 2003;Gao et al, 2003;Hu et al, 2007;Luo et al, 2008). Feng et al (2005) showed that the extractable amount of Cr, Cu, Zn and Cd by the root exudes correlated significantly with the metal content of barley roots, while 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. They concluded that the rhizosphere-based method is the most robust approach for evaluation of bioavailability of metals in soil to barley.…”

Section: Introductionmentioning

confidence: 95%

A root exudates based approach to assess the long-term phytoavailability of metals in biosolids-amended soils

Koo¹,

Chen²,

Chang³

et al. 2010

Environmental Pollution

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A comparison of the rhizosphere-based method with DTPA, EDTA, CaCl2, and NaNO3 extraction methods for prediction of bioavailability of metals in soil to barley

Cited by 254 publications

References 44 publications

Is an adjusted rhizosphere-based method valid for field assessment of metal phytoavailability? Application to non-contaminated soils

Is an adjusted rhizosphere-based method valid for field assessment of metal phytoavailability? Application to non-contaminated soils

Bioavailability of lead using chemical extractants in soil treated with humic acids and activated carbon

A root exudates based approach to assess the long-term phytoavailability of metals in biosolids-amended soils

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