Disponibilidade de cobre e zinco em solos do sul do Brasil

Bortolon, Leandro; Gianello, Clésio

doi:10.1590/s0100-06832009000300017

Cited by 11 publications

(11 citation statements)

References 10 publications

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“…The coefficients obtained between the contents extracted with the Mehlich-1solution and the quantity accumulated by these crops were 0.59 (p < 0.05) for maize and 0.65 (p < 0.01) for soybean. In another study involving 26 soils from the state of São Paulo, Bataglia & Raij (1989) assessed Cu availability with the test plants sunflower and sorghum and found even lower correlation coefficients (r = 0.36 and r = 0.44, respectively) than those reported by Bortolon & Gianello (2009) and in the present study. Borkert et al (2004), however, concluded that Mehlich-1 adequately assessed plant-available Cu.…”

Section: Comparison Of Extractantscontrasting

confidence: 79%

“…Bortolon & Gianello (2009) also observed the low efficiency of Mehlich-1 in assessing Cu availability for maize and for soybean in soils of the state of Rio Grande do Sul. The coefficients obtained between the contents extracted with the Mehlich-1solution and the quantity accumulated by these crops were 0.59 (p < 0.05) for maize and 0.65 (p < 0.01) for soybean.…”

Section: Comparison Of Extractantsmentioning

confidence: 87%

“…Menezes et al (2010) observed that the quantity of Zn taken up by maize plants in different limed and unlimed soils of Minas Gerais was significantly correlated with the contents recovered by the extractants Mehlich-1, Mehlich-3 and DTPA. On the other hand, Bortolon & Gianello (2009) observed that 0.1 mol L -1 HCl, Mehlich-1 and Mehlich-3 did not adequately assess Cu and Zn availability for maize and soybean plants in soils of the state of Rio Grande do Sul. Similarly, Fonseca et al (2010) concluded that the extractants HCl, Mehlich-1, Mehlich-3 and DTPA were ineffective in predicting availability of cation micronutrients for wheat after soil surface liming in Ponta Grossa (PR).…”

Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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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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Section: Comparison Of Extractantscontrasting

confidence: 79%

Section: Comparison Of Extractantsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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Assessment of micronutrient extractants from soils of Paraná, Brazil

Sarto

Steiner

Lana

2011

Rev. Bras. Ciênc. Solo

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“…Crop yields may be limited by micronutrient deficiency caused by the low natural fertility of some soils, considerable nutrient removal by harvests and excessive application of phosphate fertilizers and substances for correction of soil acidity, causing the insolubility of micronutrients in the soil [16]. For countries like Ethiopia, where there is no micronutrient application in the form of chemical fertilizers or organic elements, micronutrients are removed through crop harvest [17].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of universal extractants for determination of selected micronutrients from soil

Bibiso¹,

Taddesse²,

Gebrekidan³

et al. 2015

Bull. Chem. Soc. Eth.

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ABSTRACT.A study was carried out with the objective of identifying the most suitable universal extractant for determination of selected micronutrients from soils. Composite surface soil samples (0-20 cm) were collected from Eastern Harargie Zone (Babile and Haramaya Districts), Wolaita Zone (Damot Sore, Boloso Bombe, Damot Pulasa and Humbo Districts) and Dire Dawa Administrative Council by purposive sampling. The treatments were arranged in completely randomized design (CRD) with three replications at Haramaya University Soil Laboratory. The results showed that among the universal extractants examined for the determination of available Fe, Cu and Zn, the highest correlation coefficients (r = 0.95), (r = 0.99) and (r = 0.97) at (p < 0.001) were found between DTPA and AB-DTPA for available Fe, Cu and Zn, respectively. Therefore, AB-DTPA universal extractant can easily be adopted as a soil testing method for the determination of available Fe, Cu and Zn in some selected soils of Ethiopia. Similarly, the concentration of available Mn determined by DTPA method was significantly correlated with the amount determined by tested universal extractants. The highest correlation coefficients were found between DTPA and 0.01 M CaCl2 (r = 0.90), DTPA and 0.01 M BaCl2 (r = 0.87), DTPA and 0.02 M SrCl2 (r = 0.86), DTPA and 0.1 M BaCl2 (r = 0.89) and DTPA and AB-DTPA (r = 0.85). However, considering the use of universal extractant, AB-DTPA could be the most suitable universal extractant for the determination of available Mn in soils of the studied areas as well. Therefore, AB-DTPA extractant is considered to be superior and the most suitable universal extractant for determination of available Fe, Cu, Mn and Zn in soil of the studied areas.

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Potentially toxic elements (PTEs) in soils from the surroundings of the Trans-Amazonian Highway, Brazil

Souza

Fernandes

Braz

et al. 2014

Environ Monit Assess

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The Trans-Amazonian Highway (TAH) is located in the northern region of Brazil, comprising a border region where agricultural, mining, and logging activities are the main activities responsible for fostering economic development, in addition to large hydroelectric plants. Such activities lead to environmental contamination by potentially toxic elements (PTEs). Environmental monitoring is only possible through the determination of element contents under natural conditions. Many extraction methods have been proposed to determine PTEs' bioavailability in the soil; however, there is no consensus about which extractor is most suitable. In this study, we determined the contents of PTEs in soils in the surroundings of TAH after mineral extraction with diethylenetriaminepentaacetic acid-triethanolamine (DTPA-TEA), Mehlich I, and Mehlich III solutions. Soil samples were collected in areas of natural vegetation in the vicinity of TAH in the state of Pará, Brazil. Chemical attributes and particle size were determined, besides concentrations of Fe, Al, Mn, and Ti by sulfuric acid digestion, Si after alkaline solution attack, and poorly crystalline Fe, Al, and "free" Fe oxides. Mehlich III solution extracted greater contents from Fe, Al, and Pb as compared to Mehlich I and DTPA-TEA and similar contents from Cd, Mn, Zn, and Cu. Significant correlations were found between concentrations of PTEs and the contents of Fe and Mn oxides as well as organic carbon and soil cation exchange capacity. Contents of Cu, Mn, Fe, and Zn by the three methods were positively correlated.

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Disponibilidade de cobre e zinco em solos do sul do Brasil

Cited by 11 publications

References 10 publications

Assessment of micronutrient extractants from soils of Paraná, Brazil

Assessment of micronutrient extractants from soils of Paraná, Brazil

Evaluation of universal extractants for determination of selected micronutrients from soil

Potentially toxic elements (PTEs) in soils from the surroundings of the Trans-Amazonian Highway, Brazil

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