Acid‐Extractable Zinc of Soils in Relation to the Occurrence of Zinc‐Deficiency Symptoms of Corn: a Method of Analysis

Wear, John I.; Sommer, Anna L.

doi:10.2136/sssaj1948.036159950012000c0031x

Cited by 55 publications

(10 citation statements)

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“…As análises dos AH sólidos e em solução (pH 3,0 e 2,5), por RPE, foram realizadas na Embrapa/CNPDIA, conforme descrito por Moreira (2003 (Mehlich, 1984) e solução de HCl 0,1 mol L -1 (Wear & Sommer, 1948).…”

Section: Methodsunclassified

Formas químicas, disponibilidade de manganês e produtividade de soja em solos sob semeadura direta

Moreira

Prochnow

Kiehl

et al. 2006

Rev. Bras. Ciênc. Solo

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Section: Methodsunclassified

Formas químicas, disponibilidade de manganês e produtividade de soja em solos sob semeadura direta

Moreira

Prochnow

Kiehl

et al. 2006

Rev. Bras. Ciênc. Solo

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“…In Brazil, different chemical extractants are used to determine plant-available Cu, Zn, Fe, and Mn, particularly with dilute acid solutions, e.g, 0.1 mol L -1 HCl (Wear & Sommer, 1948) and Mehlich-1 (0.05 mol L -1 HCl and 0.0125 mol L -1 H 2 SO 4 ) (Mehlich, 1953), and the chelates, such as DTPA and EDTA (Lindsay & Norvell, 1978). The extraction principles of the methods vary greatly.…”

Section: Introductionmentioning

confidence: 99%

Assessment of micronutrient extractants from soils of Paraná, Brazil

Sarto

Steiner

Lana

2011

Rev. Bras. Ciênc. Solo

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SUMMARYIn 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.Index terms: soil analysis, correlation, copper, zinc, iron, manganese.

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“…The available concentration of Cd, Cu, Fe, Mn, Pb and Zn in the samples were extracted using four extractants: a) Mehlich-1 (Silva, 2009) (Wear & Sommer , 1947), c) DTPA (Lindsay & Norvell, 1978) Pires et al (2004).…”

Section: Methodsmentioning

confidence: 99%

Availability of heavy metals in contaminated soil evidenced by chemical extractants

2012

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RESUMO Disponibilidade de metais pesados a estratores químicos em solos contaminadosMetais pesados vêm se acumulando em solos brasileiros em razão de processos naturais, como deposições atmosféricas, ou atividades antropogênicas. Para alguns metais pesados, em condição de altas concentrações no solo, não existe um extrator especifico que avalie sua biodisponibilidade. Objetivou-se no presente trabalho, avaliar a biodisponibilidade dos elementos Cd, Cu, Fe, Mn, Pb e Zn para plantas de arroz e soja, utilizando diferentes extratores químicos. Neste estudo foram utilizadas sete amostras de solos com diferentes graus de contaminação, em delineamento experimental inteiramente casualizado, com quatro repetições. Foram determinados os teores disponíveis de Cd, Cu, Fe, Mn, Pb e Zn extraídos pelas soluções de Mehlich-1, HCl 0,1 mol L -1 , DTPA e ácidos orgânicos, e os teores desses elementos em plantas de arroz e soja, cujos extratos foram analisado por ICP-OES. Observou-se que os extratores Mehlich-1, HCl 0,1 mol L -1 e DTPA foram eficientes para avaliar a disponibilidade de Cd, Cu, Pb e Zn para plantas de arroz e soja. O mesmo não foi observado para os extratores derivados de ácidos orgânicos. Palavras Availability of heavy metals in contaminated soil evidenced by chemical extractantsHeavy metals have been accumulating in Brazilian soils, due to natural processes, such as atmospheric deposition, or human industrial activities. For certain heavy metals, when in high concentrations in the soil, there is no specific extractant to determine the availability of these elements in the soil. The objective of the present study was to evaluate the availability of Cd, Cu, Fe, Mn, Pb and Zn for rice and soybeans, using different chemical extractants. In this study we used seven soil samples with different levels of contamination, in completely randomized experimental design with four replications. We determined the available concentrations of Cd, Cu, Fe, Mn, Pb and Zn extracted by Mehlich-1, HCl 0.1 mol L -1 , DTPA, and organic acid extractants and the contents in rice and soybeans, which extracts were analyzed by ICP-OES. It was observed that Mehlich-1, HCl 0.1 mol L -1 and DTPA extractants were effective to assess the availability of Cd, Cu, Pb and Zn for rice and soybeans. However, the same was not observed for the organic acid extractant.

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Acid‐Extractable Zinc of Soils in Relation to the Occurrence of Zinc‐Deficiency Symptoms of Corn: a Method of Analysis

Cited by 55 publications

References 0 publications

Formas químicas, disponibilidade de manganês e produtividade de soja em solos sob semeadura direta

Formas químicas, disponibilidade de manganês e produtividade de soja em solos sob semeadura direta

Assessment of micronutrient extractants from soils of Paraná, Brazil

Availability of heavy metals in contaminated soil evidenced by chemical extractants

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