Formas de Alumínio em Solos Ácidos Brasileiros com Teores Excepcionalmente Altos de Al3+ Extraível com KCI

Cunha, Gabriel Octávio de Mello; Almeida, Jaime Antônio de; Testoni, Samara Alves; Barboza, Bethina Bastos

doi:10.1590/01000683rbcs20150017

Cited by 15 publications

(28 citation statements)

References 29 publications

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“…Al saturation decreased in all soils with increasing limestone doses (Table 3). In an earlier study, using the same soils as the present investigation, Cunha et al (2014Cunha et al ( , 2015 suggest that part of the Al-KCl does not represent the exchangeable forms of Al, since the high concentration of KCl (1.0 mol L -1 ) may hydrolyze some of the non-exchangeable forms of Al, possibly originating in the amorphous compounds of these soils, overestimating its exchangeable content and, in turn, Al saturation (Table 3). Overestimating Al-KCl may mask Al toxicity to plants, since the amount of Al extracted and quantified may be greater than the actual aluminum toxicity in roots (Ebeling et al, 2008;Bernini et al, 2013;Cunha et al, 2018aCunha et al, , 2018b.…”

Section: Soil Chemical Propertiesmentioning

confidence: 46%

Nutritional Efficiency and Nutrient Acumulation of Maize Cultivated in Soils With High Al-KCl Content

Cunha¹,

Almeida²,

Souza³

et al. 2019

JAS

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Most Brazilian soils are weathered and acidic, generally with exchangeable aluminum levels toxic to plants. Aluminum content can exceed 10 cmolc kg-1 in certain soils, but does not interfere in plant nutrient absorption, transport and accumulation. This study aimed to assess whether the high aluminum levels extracted with 1 mol L-1 KCl solution affect the nutritional efficiency of maize plants grown in acidic soils in areas of Brazilian states (AC: profile 9, PE, SC and RS) never before cultivated. To that end, two greenhouse experiments were performed (soybean: 45 days and maize: 60 days) with increasing levels of lime (0; 25; 50 and 100% H+Al content). After the experiments and collection, chemical analyses were conducted to characterize the soils and determine the chemical composition of the maize plants. The Al levels did not interfere in maize plants, nutrient absorption, transport, use or accumulation in AC9 and Rosario do Sul (RS) soils, but did affect those cultivated in PE, BR and CB soils in treatments without lime. The absence of Al toxicity is related to the increased concentration and activity of basic cations and P in the soil solution.

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Section: Soil Chemical Propertiesmentioning

confidence: 46%

Nutritional Efficiency and Nutrient Acumulation of Maize Cultivated in Soils With High Al-KCl Content

Cunha¹,

Almeida²,

Souza³

et al. 2019

JAS

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“…In some Brazilian acid soils, the aluminum extractable by the KCl 1.0 mol L -1 solution (Al-KCl) may exceed 10 cmol c kg -1 (Almeida et al, 2010;Bernini et al, 2013;Cunha et al, 2014Cunha et al, , 2015. However, in some of these situations, no symptoms of Al 3+ toxicity were found in the plants, which had satisfactory yields, even when, after liming, the amounts of Al-KCl still remain high.…”

Section: Introductionmentioning

confidence: 99%

Chemical Species and Aluminum Concentration in the Solution of Acid Soils Cultivated with Soybean and Corn under Liming

Cunha

Almeida

Ernani

et al. 2018

Rev. Bras. Ciênc. Solo

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“…Among the dioctahedral smectites identified by the Greene-Kelly test (Figure 3), the dominance of beidelite is more likely to be considered as an aluminous smectite mineral (Borchardt, 1989). This mineral contains the octahedral sheet consisting of Al hydroxide (Borchardt, 1989), and its geochemical destabilization can be an important source for the high exchangeable Al contents found in P3 (Table 3), as discussed in Ribeiro et al (1990) and Cunha et al (2014Cunha et al ( , 2015.…”

Section: Soil Properties and Their Relation To Pedogenesismentioning

confidence: 99%

“…Due to the distinct lithotypes around the Cabo Basin (volcanic rocks and siliciclastic sedimentary rocks), studies have shown the occurrence of Argissolos with high levels of exchangeable Al (>4 cmol c kg -1 ) and high clay activity (smectite minerals in the clay fraction), that formed from the weathering of conglomerates (Costa, 2012). Although soils with similar properties have been studied in several parts of Brazil (Cunha et al, 2014(Cunha et al, , 2015Delarmelinda et al, 2017), previous pedological studies in the Cabo Basin do not cover the current knowledge of local geological diversity. The presence of smectites is also not common in the clay fraction of the Nitossolos in Brazil, probably due to the strong weathering involved in the formation of these soils, predominated by monosialitization and ferralitization processes (Cooper and Vidal-Torrado, 2005).…”

Section: Introductionmentioning

confidence: 99%

Genesis and Classification of Nitisols from Volcano-Sedimentary Lithology in Northeastern Brazil

Costa

Araújo

Neves

et al. 2019

Rev. Bras. Ciênc. Solo

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On the southern coast of Pernambuco State (PE), Brazil, lithotypes of the Cabo Basin (volcanic and sedimentary rocks), in association with the relief, allow the determination of the dynamics of the formation of Nitossolos Háplicos (Nitisols), including those with high levels of exchangeable aluminum. The objective of this study was to evaluate the influence of lithological diversity (basalt and sedimentary siliciclastic rocks) on the morphological, physical, chemical, and mineralogical properties of Nitossolos Háplicos along a slope (P1-summit, P2-backslope, P3-footslope) on the southern coast of PE, in order to consider its genesis and the relation of soil properties to adjacent environments and to evaluate its framing within the Brazilian Soil Classification System (SiBCS). The interaction of lithology/soil permeability and climate indicate significant differences in the mineralogical composition and dynamics of soil chemical elements. The profiles P1 and P2 are subject to monosialitization, ferralitization, and alitization processes. All profiles showed high Fe contents (ferric soils) and clay fractions, consisting primarily of kaolinite, goethite, hematite, and gibbsite, as well as quartz and feldspar in the sand and silt fractions. However, smectite minerals (P3) are probably inherited from the sedimentary source material. In the conglomerate samples, under P3, biotite, muscovite, and plagioclase were identified. Allytic characteristics (P3) are probably associated with the weathering of aluminous smectite minerals. These properties distinguish these soils from adjacent Nitossolos and other Nitossolos in Brazil. For the classification of soils according to SiBCS, considering the high levels of Fe and Al, Nitossolo Háplico distroférrico (P1 and P2) and Nitossolo Háplico alitiférrico (P3) are suggested, and according to the World Reference Base of Soils (WRB), the soils are classified as Ferritic Nitisols.

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Formas de Alumínio em Solos Ácidos Brasileiros com Teores Excepcionalmente Altos de Al3+ Extraível com KCI

Cited by 15 publications

References 29 publications

Nutritional Efficiency and Nutrient Acumulation of Maize Cultivated in Soils With High Al-KCl Content

Nutritional Efficiency and Nutrient Acumulation of Maize Cultivated in Soils With High Al-KCl Content

Chemical Species and Aluminum Concentration in the Solution of Acid Soils Cultivated with Soybean and Corn under Liming

Genesis and Classification of Nitisols from Volcano-Sedimentary Lithology in Northeastern Brazil

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