Use of pedological maps in the identification of sensitivity of soils to acidic deposition: application to Brazilian soils

Melfi, Adolpho José; Montes, Célia Regina; Carvalho, A.; Forti, M. C.

doi:10.1590/s0001-37652004000100012

Cited by 14 publications

(7 citation statements)

References 2 publications

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“…Soils are deep, mostly brown, with very low or null stoniness, and they are predominantly sandy loams and slightly acids. The original class is Ferralsols (Melfi et al 2004). Cultivated, irrigated and/ or fertilized lots do not take place along the watershed.…”

Section: Location and Environmental Characteristics Of Study Areamentioning

confidence: 99%

Soil Quality Attributes Related to Urbanization in Brazilian Watershed

Silva

Urban

Manfré

et al. 2017

Journal of Environmental Engineering and Landscape Management

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In this study we investigated the variation of soil attributes according to urban-related land cover categories. The study was carried out in an urbanized watershed located in the Brazilian subtropical region (Sorocaba Municipality, São Paulo). Soil samples were collected considering the land cover category for analysis of physical, chemical and isotopic attributes. The land cover influenced the soils attributes. Soils from wooded and grassed areas presented significant differences, especially for values of C isotopes. Soil bulk density was significantly altered. According to considered land cover mosaic in the study, we estimated 10,241.28 tons of C stored in the thickness 20 cm of the watershed (whole area), and this amount is almost a half of the total potential of C storing in the watershed. We stress that projects of planned land cover should effectively implemented in urbanized regions to effectively contribute in storing more C and improving the soil-related ecosystem services.

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Section: Location and Environmental Characteristics Of Study Areamentioning

confidence: 99%

Soil Quality Attributes Related to Urbanization in Brazilian Watershed

Silva

Urban

Manfré

et al. 2017

Journal of Environmental Engineering and Landscape Management

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“…The acidification of soil and surface water is a serious concern in society today [15][16][17]. The acid rain and resulting soil acidification are a real problem in São Paulo state due to the intense industrialization [18], and the soils in the region studied here are considered the most sensitive to acidification in Brazil [19]. Statistical and geostatistical techniques can assist in the interpretation of research in soil pollution by heavy metals [1,20,21].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Copper and Zinc in Soils of a Vineyard Region in the State of São Paulo, Brazil

Santos

Valladares²,

Abreu

et al. 2013

Applied and Environmental Soil Science

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This soil acidification may increase the bioavailability of copper (Cu) and zinc (Zn) in soils. The objective of this study was to verify the concentrations of Cu and Zn in soils of a vineyard region, including sample acidification, to simulate acid rain. The study was developed in an area of vineyard cultivation, with an adjacent land having other crops grown, in the state of São Paulo, Brazil. Soil samples were collected and GPS located under different uses and coverings. The extracted solutions used to determine the available Cu and Zn forms were diethylenetriaminepentaacetic acid (DTPA), pH 7.3, and calcium chloride 0.01 M. The total forms were obtained by HNO3digestion. The amounts of Cu and Zn extracted using DTPA were considered high in most of the samples and were greater in the areas cultivated with vineyards that had received fungicide applications for several decades. The total forms were higher in vineyard soils. The amounts of Cu and Zn extracted using CaCl2did not have good correlation with vineyards or with other metals' forms. The results confirmed that the soil was enriched with Cu and Zn due to the management of the vineyards with chemicals for several decades.

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“…), em condições de baixa a moderada lixiviação de sílica (Churchman, 2000;Reid-Soukup & Ulrey, 2002). No Brasil, solos ricos em esmectitas podem ser encontrados na região semiárida, no pampa e no pantanal (Melfi et al, 2004). No Nordeste, sua ocorrência e permanência está associada ao clima bastante seco, sem excedente hídrico, que desfavorece a dessilicação ; no Sul, ao paleoclima seco (Bombin & Klamt, 1974); e no Pantanal, às condições de drenagem impedida.…”

Section: Introductionunclassified

Métodos de concentração de minerais 2:1 secundários na fração argila visando sua identificação por difratometria de raios x

Melo

Mattos²,

Lima³

2009

Rev. Bras. Ciênc. Solo

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RESUMOAlém dos baixos teores normalmente encontrados na fração argila dos solos sob clima tropical e subtropical, o tamanho reduzido e a baixa cristalinidade dos minerais 2:1 secundários dificultam sua identificação por difratometria de raios X (DRX). Este estudo objetivou avaliar métodos químicos e físico de concentração de minerais 2:1 secundários na fração argila para facilitar a identificação por DRX, incluindo a natureza dos minerais quanto ao local de formação de cargas permanentes (lâmina tetraedral ou octaedral). Coletaram-se amostras de dois Cambissolos originados de argilito da Formação Guabirotuba na Bacia Sedimentar de Curitiba (PR): horizontes A, Bi, C1 (1,2 a 1,5 m), C2 (2,2 a 2,5 m), C3 (3,2 a 3,5 m) e C4 (4,2 a 4,5 m). Após remoção da matéria orgânica e dispersão da terra fina seca ao ar, a fração argila foi submetida a tratamentos sequenciais com ditionito-citratobicarbonato (DCB) (amostra desferrificada -remoção de óxidos de Fe pedogenéticos) e com soluções de NaOH a quente, em diferentes concentrações (0,5; 1,0; 1,5; 2,5; 3,5; 4,0; 4,5 e 5,0 mol L -1 ), para extração de gibbsita e caulinita, em diferentes graus. A fração argila desferrificada também foi submetida à separação física (centrifugação) em argila grossa (0,2 a 2 μ μ μ μ μm) e fina (< 0,2 μ μ μ μ μm). Foram realizados tratamentos auxiliares para identificar as espécies minerais 2:1 na fração argila: saturação com Mg e solvatação com etilenoglicol; saturação com K e secagem ao ar e aquecimento a 550 °C; e saturação com Li (teste de Greene-Kelly). Os resultados mostraram que o método clássico de extração da caulinita, com solução de NaOH 5,0 mol L -1 a quente, não deve ser aplicado para concentração de minerais 2:1 secundários, pois também removeu grande parte desses minerais. O tratamento com DCB e com solução de NaOH 3,5 mol L -1 possibilitou, com maior eficiência, a concentração e identificação de minerais 2:1 secundários por DRX nas amostras dos horizontes A, Bi e C1. Nas amostras tomadas em maiores profundidades (horizontes C2, C3 e C4), devido aos maiores teores desses minerais e ao menor tamanho dos cristais (argila fina), a solução menos concentrada de NaOH (1,5 mol L -1 ) foi mais eficiente para esse propósito. No horizonte A, os minerais 2:1 concentraram-se na fração argila grossa, compatível com o maior grau de

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Use of pedological maps in the identification of sensitivity of soils to acidic deposition: application to Brazilian soils

Cited by 14 publications

References 2 publications

Soil Quality Attributes Related to Urbanization in Brazilian Watershed

Soil Quality Attributes Related to Urbanization in Brazilian Watershed

Assessment of Copper and Zinc in Soils of a Vineyard Region in the State of São Paulo, Brazil

Métodos de concentração de minerais 2:1 secundários na fração argila visando sua identificação por difratometria de raios x

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