Quantification of aluminium in soil of the Solimões Formation, Acre State, Brazil

Bernini, Thiago Andrade; Pereira, Marcos Gervásio; Anjos, Lúcia Helena Cunha dos; Pérez, Daniel Vidal; Fontana, Ademir; Calderano, S. B.; Wadt, Paulo Guilherme Salvador

doi:10.1590/s0100-06832013000600015

Cited by 7 publications

(6 citation statements)

References 20 publications

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“…The predominance of negative charges in Amazonian soils is highly influenced by the functional groups of organic matter (Bernini et al 2013). Humidified organic matter (represented by TOC) increased the density of negative electrical charge in the more superficial horizons of the studied profiles, specially in Profiles 3 and 5, which were derived from sedimentary materials.…”

Section: Acta Amazonicamentioning

confidence: 93%

“…It is interesting to note the presence of kaolinite in coexistence with gibbsite in the samples, such that the presence of Al oxides is conditioned to the low activity of silica (Bernini et al 2013). Kaolinite persists in many environments as a relic of the initial cycles of weathering or comes from poorly drained sites distributed in the microstructure of the soil (White and Dixon 2002).…”

Section: Acta Amazonicamentioning

confidence: 99%

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Association between parent materials and soil attributes along different geological environments in western Pará, Brazil

et al. 2018

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The expansion of the agricultural frontier into different geological environments in the west of the state of Pará, northern Brazil, makes it necessary to know the influence of the parent material on local soil attributes. This study aimed to evaluate the influence of different parent materials on five soil profiles along a lithosequence exposed by the BR-163 highway, which runs from north to south through western Pará. The soils were classified, morphologically described and their main horizons sampled for physical, mineralogical and chemical analyses, including the determination of micronutrients, forms of phosphorus and secondary forms of iron. Multivariate analysis was used to group the different soil-parent material associations. The results demonstrated that the diversity of the parent material was a determinant of soil attributes, and was a conditioning factor for the formation of different clay minerals. Multivariate analysis grouped the soils along the lithosequence into a group formed by profiles derived from basic and intermediate igneous rocks, and a second group consisting of profiles derived from sediments and sedimentary rocks. The profile derived from acidic igneous rock showed greater similarity with the profiles derived from sedimentary materials in comparison to those derived from other igneous rocks.KEYWORDS: soil mineralogy, physical attributes, chemical attributes, multivariate analysis Associação entre materiais de origem e atributos de solos ao longo de diferentes ambientes geológicos no oeste do Pará, Brasil RESUMO A expansão da fronteira agrícola em diferentes ambientes geológicos no oeste do Estado do Pará, norte do Brasil, torna necessário conhecer a influência do material de origem sobre os atributos dos solos locais. Este estudo teve como objetivo avaliar a influência de diferentes materiais de origem sobre cinco perfis de solo ao longo de uma litosequência exposta pela rodovia BR-163, que vai de norte a sul pelo oeste do Pará. Os solos foram classificados, morfologicamente descritos e seus principais horizontes amostrados para análises físicas, mineralógicas e químicas, incluindo a determinação de micronutrientes, formas de fósforo e formas secundárias de ferro. Análises multivariadas foram usadas para agrupar as diferentes associações solo-material de origem. Os resultados demonstraram que a diversidade do material de origem foi determinante para os atributos do solo, sendo um fator condicionante para a formação de diferentes argilominerais. A análise multivariada agrupou os solos ao longo da litosequência em um grupo formado por perfis derivados de rochas ígneas básicas e intermediárias, e um segundo grupo constituído por perfis derivados de sedimentos e rochas sedimentares. O perfil derivado de rocha ígnea ácida apresentou maior similaridade com os perfis derivados de materiais sedimentares em comparação àqueles derivados de outras rochas ígneas. PALAVRAS-CHAVE

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Section: Acta Amazonicamentioning

confidence: 93%

Section: Acta Amazonicamentioning

confidence: 99%

Association between parent materials and soil attributes along different geological environments in western Pará, Brazil

et al. 2018

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“…Other properties of the two soils are presented in Table 1. These soils typically contain high levels of Fe and Al oxides (e.g., Bernini et al, 2013; Tsai et al, 2007) and are widespread in South Africa and other tropical and subtropical regions of the world.…”

Section: Methodsmentioning

confidence: 99%

Temperature‐Dependency of Phosphorus Sorption by Goethites and Tropical Soils Amended with Woodchip Biochar

Amarakoon

Zvomuya

Motaung

2019

Agrosystems Geosci & Env

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Core Ideas Freundlich and Langmuir isotherms described P sorption by oxides and soils, respectively. Biochar increased the extent and relative strength of P sorption by goethite at 15°C. Biochar reduced P sorption but increased P binding strength for sandy loam at 35°C. Phosphorus is a key nutrient in agriculture but also a common contaminant. Bioavailability and transport of P are controlled by, among other things, the presence of Fe and Al oxides in tropical soils. Biochar has been suggested for improving the bioavailability and reducing the off‐site transport of P. The objective of this study was, therefore, to evaluate the effect of biochar on P sorption by goethite, aluminum‐substituted goethite (Al‐goethite), and two tropical soils amended with 0, 20, and 40 g biochar kg−1 at 15, 25, and 35°C. Sorption by goethite and Al‐goethite was adequately described by the Freundlich isotherm although the Langmuir isotherm was a better fit for the two soils tested. At 15°C, biochar application increased P sorption by goethite from 9.5 to 11 g kg−1/(mg L−1)1/n as indicated by the increase in the Freundlich constant, Kf, and the increase in relative sorption strength represented by a reduction in the Freundlich exponent (1/n) from 1.2 to 0.8. At 35°C, biochar addition significantly reduced the Langmuir sorption maximum (Smax) from 17.3 to 15.8 g kg−1 (mg L−1)−1 for the sandy loam soil, indicating a reduction in P sorption capacity in the presence of biochar. Biochar addition also significantly increased the Langmuir constant, (KL) for the sandy loam from 0.04 to 1.7 L mg−1 at 35°C, indicating greater P binding strength in the presence of biochar. The sorption data from this study provide insights into the effect of temperature on P sorption by Fe oxides and tropical soils in the presence of biochar.

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“…The process of release of Al ions from octahedral co-ordination in minerals through weathering processes [12,19] usually depends on H + ion concentration. In acid soils below pH 4.3, Al ions combine with water and solubilizes to form Al (H 2 O) 6…”

Section: Introductionmentioning

confidence: 99%

Effects of Liming on Dithionate and Oxalate Extractable Aluminium in Acid Soils

Muindi

2020

AJSSPN

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Liming and phosphorus (P) applications are recommended practices for improving crop production in acid soils of the tropics. Although considerable work has been done to establish liming rates for acid soils in many parts of the world, information on the effects of lime on the forms of aluminium which actively sorb P in such soils is minimal. A greenhouse pot experiment was conducted at Waruhiu Farmers Training Centre, Githunguri to evaluate the effect of liming on oxalate and dithionate extractable aluminium in acid soils. Extremely (pH 4.48) and strongly (pH 4.59) acidic soils were evaluated. Four liming (CaO) rates namely 0, 2.2, 5.2 and 7.4 tonnes ha-1 for extremely acidic and 0, 1.4, 3.2, and 4.5 tonnes ha-1 for strongly acidic soils were evaluated. The experiment was laid out in a Randomized Complete Block Design (RCBD) and replicated three times. Data collected included: initial soil chemical properties, oxalate (Alo) and dithionate (Ald) aluminium levels. The tested soils had high exchangeable Al (> 2 cmol Al kg-1), Al saturation of (> 20% Al) and low extractable P values (< 15 mg P kg-1 soil). Liming significantly (p=.05) reduced Alo by 70% and 68% in extremely and strongly acidic soils respectively and Ald by 78% in both extremely and strongly acidic soils compared to control. Use of 7.4 tonnes ha-1 of lime in extremely acidic soils and 4.5 tonnes ha-1 of lime in strongly acidic soils significantly (p=.05) reduced both Alo and Ald by > 68% compared to no lime. It was, therefore, concluded that liming contributes to the reduction of soluble Alo and Ald in acid soils of the Kenya highlands leading to increased soluble P availability. Studies are required to provide short and long term optimal liming rates that reduce Alo and Ald without distabilizing availability of other nutrients in field conditions under wide range of acid soils.

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Quantification of aluminium in soil of the Solimões Formation, Acre State, Brazil

Cited by 7 publications

References 20 publications

Association between parent materials and soil attributes along different geological environments in western Pará, Brazil

Association between parent materials and soil attributes along different geological environments in western Pará, Brazil

Temperature‐Dependency of Phosphorus Sorption by Goethites and Tropical Soils Amended with Woodchip Biochar

Effects of Liming on Dithionate and Oxalate Extractable Aluminium in Acid Soils

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