Podzolização em solos de áreas de depressão de topo dos tabuleiros costeiros do Nordeste brasileiro

Silva, Elen Alvarenga; Gomes, J. B. V.; Filho, J. C. de Araújo; Silva, Carlos Alberto; Carvalho, Samara Andrade; Curi, Nilton

doi:10.1590/s0100-06832013000100002

Cited by 11 publications

(9 citation statements)

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“…The high Al o /Al d (> 1.85) and Al o /Al p (> 0.96) ratios demonstrate that the participation of the poorly crystalline forms was higher (Table 3), as observed by Coelho et al (2010aCoelho et al ( , 2010b and Silva et al (2013) in spodic B horizons. In the Ultisol, although the Al o /Al d ratio was > 1.85 in the horizons Ap and Bt 1 , the dynamics were different, with a trend of equal distribution of the elements in depth.…”

Section: Revmentioning

confidence: 87%

“…Figure 6). The BSCS (SANTOS et al, 2018), and other studies (COELHO et al, 2010a(COELHO et al, , 2010bCORRÊA et al, , 2015MOREAU et al, 2006;OLIVEIRA et al, 2010;SILVA et al, 2013) emphasize the highest levels of Fe o and Al o in spodic B horizons. However, the values are highly variable, and hence no quantitative criteria are available to date for defining this horizon.…”

Section: Revmentioning

confidence: 88%

“…The results obtained from the selective dissolutions indicated significant differences in the distribution of Fe, Al, and Si in all profiles ( Figure 4). The results in Spodosols evidenced an accumulation of these elements in the spodic B horizons (Bsm), especially of Al associated with organic compounds (Al p ) and poorly crystalline forms (Al o ), and these characteristics are typical of soils undergoing podzolization process (COELHO et al, 2010a(COELHO et al, , 2010bCORRÊA et al, , 2015MOREAU et al, 2006;OLIVEIRA et al, 2010;SILVA et al, 2013). Figure 4.…”

Section: Soil Chemical Attributesmentioning

confidence: 98%

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Pedogenesis on Coastal Tablelands Area With Low Range Altimetry in Paraíba State

et al. 2019

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Small variations of relief may change drainage and runoff and hence promote the formation of sandy surface horizons and hardened subsurface horizons (fragipans and/or duripans) in Coastal Tablelands soils. This study aimed to investigate the pedogenesis on Coastal Tablelands area with low range altimetry in Paraíba state; secondly, we also sought to contribute to the improvement of the Brazilian Soil Classification System (BSCS). Four soil profiles ware described and collected to be submitted to routine physical and chemical analysis, determination of Fe, Al and Si extracted by sulfuric acid digestion, sodium citratebicarbonate-dithionite and acid ammonium oxalate, sodium pyrophosphate, and mineralogical analysis in the sand and clay fractions by X-ray diffractometry. Optical density of the oxalate extract (ODOE) was also determined; the results were statistically evaluated using the R software. Microrelief variations conditioning differentiated water flows, along with the sandy texture of the surface horizons (A and E) and the lower coarse sand/fine sand ratio in the subsurface horizon, seem to promote clay accumulation in depth in the Spodosols developed on Coastal Tablelands environments. For this soils, the argilluvic (argissólico) character at the subgroup level of the BSCS should be incorporated. In addition, Al amorphous mineral phases and/or poorly crystalline play an important role in the formation of strongly cemented horizons (duripans) of the Spodosols, as also reported by other authors. Finally, the ODOE showed to be an efficient indicator of soils under podzolization process, being possible its use as a taxonomic criterion for classification of Spodosols by the BSCS.

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Section: Revmentioning

confidence: 87%

Section: Revmentioning

confidence: 88%

Section: Soil Chemical Attributesmentioning

confidence: 98%

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Pedogenesis on Coastal Tablelands Area With Low Range Altimetry in Paraíba State

et al. 2019

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“…Of the four soils studied, three had features indicating podzolization in the upper portion of the sequum, with spodic horizons or spodic character beneath the eluvial horizons (Silva et al, 2013). The podzolization process is intense in p-EK and p-ESK and only incipient in the p-SX (not enough to classify it as a Spodosol).…”

Section: Soil Morphology and Physical Propertiesmentioning

confidence: 96%

“…These features occurred beneath the horizons with podzolization in each pedon, acting as an impervious layer at the subsurface and favoring the occurrence of podzolization, which is also favored by other conditions, such as flat relief, concave topography, and sandy-quartzous parent material (Oliveira et al, 2010;Silva et al, 2013). The p-ESK also had flat relief conditions and sandy-quartzous material from p-SX and p-EK, showing, in its lower portion, a C horizon with massive structure and particle size distribution that suggests a lithological discontinuity in relation to the Bsm horizon ( Table 2).…”

Section: Soil Morphology and Physical Propertiesmentioning

confidence: 99%

Cemented Horizons and Hardpans in the Coastal Tablelands of Northeastern Brazil

Gomes

Filho

Vidal‐Torrado

et al. 2017

Rev. Bras. Ciênc. Solo

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ABSTRACT:Horizons with varying degrees of cementation are a common feature of the soils from the coastal tablelands of Northeastern Brazil. In most cases, these horizons are represented by the following subsurface horizons: fragipan, duripan, ortstein, and placic. The aims of this study were to analyze differences regarding the development and the degree of expression of cementation in soils from the coastal tablelands of Northeastern Brazil: Planossolo Háplico (p-SX), Espodossolo Humilúvico (p-EK), Espodossolo Ferrihumilúvico (p-ESK), and Argissolo Acinzentado (p-PAC) pedons. The pedons studied displayed features related to drainage impediments. The cemented horizons from p-SX and p-EK had the same designation (Btgm), displaying a duric character that coincided with gleization features and are under podzolized horizons. In the p-ESK, the podzolization process is of such magnitude that it leads to the cementation of its own spodic horizons, which were both of the ortstein type (Bhsx and Bsm). In the p-PAC cementation is observed in two placic horizons and in the Btx/Bt horizon, as well as in the upper parts of the Bt/Btx horizon. Analysis of the micrographies from the cemented horizons showed predominance of a low porosity matrix. Such porosity is relatively greater in the horizons of "x" subscript than in the horizons with duric character. The Fe segregation lines were notable in the cemented horizons from p-EK and p-PAC, which corroborates the presence of placic horizons in such pedons. The preponderance of kaolinite in the clay fraction was widely verified in all the cemented horizons analyzed. Water immersion tests were the criteria adopted to define the duric character of the Btgm horizons from p-SX and p-EK, and in the Bsm horizon from the p-ESK. These tests were also used to confirm field morphology. In most cases, the maximum values of Fe, Al, and Si, determined by different extractions, occurred in positions overlaying the cemented horizons, whether they were spodic or not. The extracts of the aqueous solution displayed a noticeable accumulation of Si in the cemented horizons, except in the p-PAC. The presence of argillans in all cemented horizons allows them to be defined as illuvial, with the exception of the placic horizons, regardless of the presence of podzolization processes. The cemented horizons were preponderantly apedal, with a matrix of little porosity. The Fe, Al, and Si contents extracted by acid ammonium oxalate were effective at highlighting the influence of compounds with a low degree of crystallinity in the morphology of cemented horizons.

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Spodic Horizon

Bockheim

2014

Soil Geography of the USA

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Podzolização em solos de áreas de depressão de topo dos tabuleiros costeiros do Nordeste brasileiro

Abstract: RESUMO Os solos associados às depressões de topo dos Tabuleiros

Cited by 11 publications

References 40 publications

Pedogenesis on Coastal Tablelands Area With Low Range Altimetry in Paraíba State

Pedogenesis on Coastal Tablelands Area With Low Range Altimetry in Paraíba State

Cemented Horizons and Hardpans in the Coastal Tablelands of Northeastern Brazil

Spodic Horizon

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