Evolução e gênese de um Plintossolo Pétrico concrecionário êutrico argissólico no município de Ouro Verde de Goiás

Moreira, Hilton Lenzi; Oliveira, Virlei Álvaro de

doi:10.1590/s0100-06832008000400033

Cited by 14 publications

(14 citation statements)

References 2 publications

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“…Elevada participação da fração areia também foi verificada no horizonte Bf do FFc e pode ser atribuída à maior proporção de concreções nodulares de ferro. Moreira & Oliveira (2008) identificaram em Plintossolo Pétrico concrecionário da região de Ouro Verde, no Estado de Goiás, a predominância de quartzo na constituição mineralógica da fração areia, atribuída ao material de origem e também ao acúmulo de partículas grandes e pesadas transportadas ao longo das encostas e depositadas nas posições rebaixadas da paisagem.…”

Section: Resultsunclassified

Erosão hídrica em solos cultivados e sob mata ciliar

Momoli

Cooper

2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi identificar atributos dos solos e de sedimentos como instrumentos para determinação dos impactos decorrentes da erosão hídrica, bem como propor redução do sobreúso dos solos no Cerrado goiano. Solos e sedimentos da mata ciliar do Córrego Ponte Nova, bem como do cultivo de soja a montante foram avaliados por micromorfometria quanto à morfologia, à granulometria e à porosidade. Na encosta cultivada, o solo foi classificado como Latossolo Vermelho distroférrico, e, na mata ciliar de vereda, como Plintossolo Pétrico Concrecionário êutrico e Gleissolo Melânico Tb distrófico típico. Solos e sedimentos foram predominantemente argilosos, e a fração argila encontrava-se naturalmente agregada em partículas maiores, de tamanho silte e areia. Análises morfológicas, granulométricas e de porosidade, por micromorfometria, possibilitaram distinguir os sedimentos dos solos soterrados, pela diferenciação de coloração, textura e porosidade. Elevada concentração de agregados de argila tamanho areia no Gleissolo Melânico sugere a remoção seletiva de partículas finas, o que indica erosão no solo sob a mata ciliar. A elevada deposição de sedimentos sobre os solos da mata ciliar compromete a função de filtro do solo e também a perpetuidade e a regeneração da floresta por causa do soterramento de sementes e plântulas.Termos para indexação: erosão, impactos ambientais, micromorfometria, planejamento agrícola, sedimentos. Water erosion on cultivated soil and soil under riparian forestAbstract -The objective of this work was to identify attributes of soil and of sediments as a tool to determine the impacts from water erosion, as well as to propose reducing the overuse of the soil in the Cerrado, in the state of Goiás, Brazil. Soils and sediments from the riparian forest of the Ponte Nova Stream and from upstream soybean crop areas were evaluated by micromorphometrics as to morphology, particle size, and porosity. Rhodic Oxisol was present in the cultivated hillside, and Petroferric Oxisol and Typic Eutraquox, in the riparian forest path. Soils and sediments were predominantly clayed, and the clay fraction was naturally aggregated into larger particles of silt and sand sizes. Analyses of morphological atributes, particle size, and porosity -by micromorphometrics -allowed to distinguish the sediment of buried soils by color, texture, and porosity differentiation. The high concentration of sandy-sized clay aggregates in Typic Eutraquox suggests the selective removal of fine particles, indicating soil erosion under the riparian forest. The high sediment deposition on the riparian forest soils is a risk to the soil filter function, and also to the perpetuity and regeneration of the forest because of the burial of seeds and seedlings.

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Section: Resultsunclassified

Erosão hídrica em solos cultivados e sob mata ciliar

Momoli

Cooper

2016

Pesq. agropec. bras.

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“…The presence of these particular iron compounds is strongly associated to the genesis process (Resende et al, 2005). Soils with drainage deficiency could lead to chemical reduction of iron compounds, (Fe +3 to Fe +2 ), transport and precipitation, leading to the formation of these ferruginous materials in the profile, over time (Anjos et al, 1995;Duarte et al, 2000;Anjos et al, 2007;Moreira & Oliveira, 2008). The plinthic materials in P4 consisted mainly of kaolinite and quartz, whereas 2:1 clay silicates, and iron and aluminum oxides were observed at lower levels ( Figure 6).…”

Section: Mineralogical Propertiesmentioning

confidence: 99%

“…In the Central Amazon, these soils represent around 7.63 % (Schaefer et al, 2000), while the major areas with strong presence of plinthite and/or petroplinthite are found in the upper Solimões (Embrapa, 1986;Teixeira et al, 2010). In general, the origin of these ferruginous materials has been attributed to fluctuations of the water table, as well as to soil drainage restrictions (Lima, 2001;Moreira & Oliveira, 2008;Benedetti et al, 2011). Plinthite is a soft, humus-poor and iron-rich material composed of clay minerals, with quartz, aluminum and other materials (Embrapa, 1999;Soil Survey Staff, 2010).…”

Section: Introductionmentioning

confidence: 99%

Chemical properties and mineralogy of soils with plinthite and petroplinthite in Iranduba (AM), Brazil

Garcia¹,

Lima²,

Silva³

et al. 2013

Rev. Bras. Ciênc. Solo

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SUMMARYLarge areas of Plinthosols with ferruginous materials such as plinthite and/or petroplinthite are fairly common in the Brazilian Amazon basin. This work was carried out to investigate the chemical behavior, mineralogical composition and weathering stage of four representative soil profiles with plinthite and petroplinthite, in Iranduba, AM (Central Amazon). Three well-drained soil profiles at high elevations were studied (P1, Plinthic Vetic Ferralsol; P2 and P3, Vetic Endopetric Plinthosol) and a contrasting poorly drained soil (P4 Haplic Plinthosol), located at low elevation. After profile descriptions, soil samples were collected from each horizon, air-dried, sieved (2 mm), and analyzed for particle-size distribution, pH, exchangeable cations (Al 3+ , Ca 2+ , Mg 2+ , K + , and Na + ), as well as available P and total organic carbon (TOC) content. The minerals present in the clay and sand fractions, as well as in the ferruginous materials were identified by X-ray Diffraction (XRD). The weathering stage of these soils was assessed by means of Ki and Kr indexes, and the amounts of free and amorphous Fe and Al oxides by using dithionite citrate bicarbonate (DBC) and ammonium oxalate dissolution procedures, respectively. The results showed that all soils were extremely unfertile, with pH levels ranging between strong and moderate acidity, very low sum of bases and organic matter content, and of available P. The mineralogy of the soil CHEMICAL PROPERTIES AND MINERALOGY OF SOILS WITH PLINTHITE AND PETROPLINTHITE... profiles was very similar, mainly of the well-drained soils, with predominance of kaolinite and quartz in the clay and sand fractions, respectively. In the poorlydrained P4, 2:1 clay particles were also observed. These profiles can be considered highly developed according to the Ki index, however, the Ki value of P4 was higher, indicating that this soil was less developed than the others. In summary, these profiles with plinthite and petroplinthite can be characterized as highly developed and infertile soils and are, with exception of P4, well-drained.Index terms: Plinthosol, soil fertility, XRD, weathering degree, Central Amazon. RESUMO: ATRIBUTOS QUÍMICOS E MINERALOGIA DE SOLOS

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“…The broadest goethite feature was observed in the FF-I spectrum, centered at 950 nm, attenuated by the OM effect in the other two spectra. According to Moreira and Oliveira (2008), segregation of Fe oxides (hematite and goethite) in the form of nodules or concretions was observed in the FFc, according to Barbosa et al (2009), resulting from a moister pedoenvironment due to the concretionary horizon. Consequently, hematite hydration occurs and its transformation into goethite, as described by Motta et al (2002).…”

Section: Interpretation Of Surface Spectramentioning

confidence: 99%

Surface Spectroscopy of Oxisols, Entisols and Inceptisol and Relationships with Selected Soil Properties

Poppiel

Lacerda

Oliveira

et al. 2018

Rev. Bras. Ciênc. Solo

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Traditional method of soil survey is expensive, slow, and must be carried out by experienced researchers. Thus, advances in soil observation technologies and the need to obtain information quickly by modern techniques have intensified the use of proximal sensing. This study characterized surface reflectance spectra (A horizon) and related them to traditional soil classification, based on morphological, physical, and chemical properties of representative pedogenetic profiles, developed in two toposequences of the Distrito Federal, Brazil. In the toposequences, 15 soil profiles were selected for a complete morphological description and sampling for laboratory analyses. Soil-landscape relationships were established, and profiles were classified to the fourth level of the Brazilian Soil Classification System (SiBCS). Classes of similar soils were grouped based on their surface spectra, resulting in spectral curves of 10 representative soils in the studied area. The Morphological Interpretation of Reflectance Spectrum (MIRS) and second derivative of the Kubelka-Munk (KM) function were applied to the soil spectra. The clustered soils were similar, mainly in terms of color, textural class, and organic matter content. Groups based on soil physical and chemical properties and on surface and subsurface colors were similar to those determined by surface reflectance. The identification of soil-landscape relationships was fundamental to understand the genesis and distribution of the soils, which had similar chemical and physical properties to their parent materials. The analysis of clusters based on soil surface reflectance proved efficient in determining groups of soil classes with similar properties. Surface reflectance data were related to the soil surface and subsurface properties determined by traditional soil sample analyses, since the two approaches formed similar groups. The simultaneous interaction of soil properties was assessed by MIRS analysis, while the second derivative of the KM function adequately quantified the mineralogy of the spectra.

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Evolução e gênese de um Plintossolo Pétrico concrecionário êutrico argissólico no município de Ouro Verde de Goiás

Cited by 14 publications

References 2 publications

Erosão hídrica em solos cultivados e sob mata ciliar

Erosão hídrica em solos cultivados e sob mata ciliar

Chemical properties and mineralogy of soils with plinthite and petroplinthite in Iranduba (AM), Brazil

Surface Spectroscopy of Oxisols, Entisols and Inceptisol and Relationships with Selected Soil Properties

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