Caracterização e classificação de gleissolos da várzea do rio Solimões (Manacapuru e Iranduba), Amazonas, Brasil

Guimarães, Sérgio Tavares; Lima, Hedinaldo Narciso; Teixeira, W. G.; Neves, Afrânio Ferreira; Silva, Francisco Weliton Rocha; Macedo, Rodrigo Santana; Souza, Kleberson Worslley de

doi:10.1590/s0100-06832013000200003

Cited by 25 publications

(23 citation statements)

References 7 publications

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“…All soils were quite stratified, presenting a sequence of various thin horizons, as is characteristic of soils formed under conditions where material deposition predominates (Souza Júnior et al, 2001;Corrêa et al 2003;Guimarães et al, 2013). Despite the hydromorphism action in all soils, in the P3 and P6 profiles were observed A-C horizons sequences and H1-H2-H3, respectively.…”

Section: Morphological and Physical Characterizationmentioning

confidence: 87%

“…The significant heterogeneity of soils in floodplain areas is inherent to hydromorphic environments (Corrêa et al, 2003;Souza Júnior et al, 2007;Coringa et al, 2012;Guimarães et al, 2013), in which the topographic location and drainage capacity, water quality, sediment type and seasonal flooding influence pedogenetic features. The objective of this study was to characterize the morphology, physical and chemical, as well as taxonomically classify floodplain soils developed in different parts of the PAMR.…”

Section: Introductionmentioning

confidence: 99%

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Characterization and Classification of Floodplain Soils in the Porto Alegre Metropolitan Region, Rs, Brazil

et al. 2015

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In the Porto Alegre metropolitan region (PAMR) there are a significant proportion of floodplain soils, mainly Planosols and Gleysols, in relation to upland soils. This study aimed to evaluate the morphological, chemical and physical characteristics, and to classify floodplain soils in the PAMR. Six soil profiles were evaluated under different sedimentary lithologies and drainage classes, and samples were collected for chemical and physical analyzes. Two orders of mineral soils (Planosols and Gleysols) and one order of organic soil (Organosols) were identified. The soils were moderately deep to deep and stratified. In mineral soils hue ranged between 7.5YR and 2.5Y, with the occurrence of Bg, Btg or Cg gley horizons, while in organic soil the colors were neutral. Sand and silt were the predominant particle sizes according to the origin sedimentary deposits. The organic carbon content was negatively related to soil density and positively related to soil specific surface area and with soil cation exchange capacity. Soil chemical characterization showed expressive variation in bases, aluminum and sodium saturation. Ki index and Fe (CBD) /Fe (H2SO4) ratio indicated a low soil weathering degree. The different sedimentary lithologies and the soil hydromorphism degree were the main factors related to differences in morphological, physical and chemical characteristics of soils in the PAMR.Index terms: Hydromorphic soils; quaternary sediments; specific surface area. RESUMONa região metropolitana de Porto Alegre (PAMR) é expressiva a proporção de solos de várzea em relação aos solos de terras altas, com predomínio de Planossolos e Gleissolos. Este estudo objetivou caracterizar a morfologia, a física e a química, e classificar taxonomicamente solos em posições de várzea na PAMR. Foram abertas seis trincheiras em relevo plano, sob diferentes litologias sedimentares e classes de drenagem,onde foram realizadas a descrição morfológica dos perfis de solos e a coleta de amostras para as análises físicas e químicas.Foram identificadas duas ordens de solos minerais (Gleissolo e Planossolo) e uma orgânica (Organossolo). Os solos foram moderadamente profundos a profundos e estratificados. Nos solos minerais a matiz variou entre 7,5YR e 2,5Y, com ocorrência de horizontes gleizados Bg, Btg ou Cg, enquanto no Organossolo as cores foram neutras. A granulometria dos solos, com predominância das frações areia e silte, variou conforme os depósitos sedimentares de origem. A expressiva amplitude dos teores de C orgânico mostrou relação negativa coma densidade do solo, e positiva com a área superficial específica e a capacidade de troca de cátions. Os atributos químicos também se mostraram discriminantes entre os solos avaliados, com ocorrência de distrofismo e eutrofismo, variações amplas dos teores de Al 3+ trocável e ocorrência de caráter solódico. Nos solos minerais o índice Ki e a relação Fe (CBD) /Fe (H2SO4) indicaram um grau incipiente de desenvolvimento dos solos. O material de origem e o grau de hidromorfismo foram os principa...

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Section: Morphological and Physical Characterizationmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Characterization and Classification of Floodplain Soils in the Porto Alegre Metropolitan Region, Rs, Brazil

et al. 2015

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“…The average accuracy of the IPDS areas was 72.7 %, and was 100, 75, and 50 % for the Plintaquults, Albaquults, and Aquents, respectively (Table 4). These accuracies were satisfactory, considering the greater difficulty in mapping these areas in comparison to better drained areas because of the significant heterogeneity of soils inherent to hydromorphic environments (Coringa et al, 2012;Guimarães et al, 2013;Silva Neto, 2015). Moreover, the terrain variations are small in these areas, which makes it more difficult to differentiate soil classes using terrain variables.…”

Section: Resultsmentioning

confidence: 99%

Spatial Disaggregation of Multi-Component Soil Map Units Using Legacy Data and a Tree-Based Algorithm in Southern Brazil

Machado

Giasson

Campos

et al. 2018

Rev. Bras. Ciênc. Solo

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Soil surveys often contain multi-component map units comprising two or more soil classes, whose spatial distribution within the map unit is not represented. Digital Soil Mapping tools supported by information from soil surveys make it possible to predict where these classes are located. The aim of this study was to develop a methodology to increase the detail of conventional soil maps by means of spatial disaggregation of multi-component map units and to predict the spatial location of the derived soil classes. Three digital maps of terrain variables -slope, landforms, and topographic wetness indexwere correlated with the soil map and 72 georeferenced profiles from the Porto Alegre soil survey. Explicit rules that expressed regional soil-landscape relationships were formulated based on the resulting combinations. These rules were used to select typical areas of occurrence of each soil class and to train a decision tree model to predict the occurrence of individualized soil classes. Validation of the soil map predictions was conducted by comparison with available soil profiles. The soil map produced showed high agreement (80.5 % accuracy) with the soil classes observed in the soil profiles; Ultisols and Lithic Udorthents were predicted with greater accuracy. The soil variables selected in this study were suitable to represent the soil-landscape relationships, suggesting potential use in future studies. This approach developed a more detailed soil map relevant to current demands for soil information and has potential to be replicated in other areas in which data availability is similar.

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“…De acordo com dados da CONAB (2008), a área cultivada representa 4,6 mil hectares, quantitativo pequeno quando comparado com a totalidade dos ambientes de Várzea que representam aproximadamente 24,8 milhões de hectares (BRASIL, 1979). Esses solos de várzea são ricos em nutrientes, oriundos de material suspenso provenientes das inundações sazonais (OLIVEIRA et al, 2010), enquanto que as áreas de terra firme não sofrem inundação e são formadas por sedimentos terciários, porém com poucas reservas de nutrientes para as plantas (CAMPOS, 2009 (LIMA et al, 2006;GUIMARÃES et al, 2013) e contrastam com os solos bem drenados de terra firme, os quais apresentam baixa fertilidade devido, dentre outros fatores, à natureza do material geológico (LIMA et al, 2006).…”

Section: Introductionunclassified

Growth of cowpea cultivars in upland and lowland soils

Santos¹,

Silva²,

Oliveira³

et al. 2017

Ambiência

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ResumoO feijão caupi apresenta grande importância na alimentação, especialmente das populações das regiões norte e nordeste brasileiro, sendo uma das principais fontes de energia e proteína nessas localidades. Entretanto, as produtividades obtidas geralmente são baixas, o que poderia ser contornado utilizando-se solos de maior fertilidade natural. Assim, o objetivo, neste trabalho, foi avaliar o crescimento de três cultivares de feijão caupi cultivado em solo de terra firme e de várzea, na região de Humaitá, Amazonas. O experimento foi conduzido em casa de vegetação, utilizando-se sacos de polietileno de aproximadamente 2 litros. Como substrato, foram coletadas amostras de solos na profundidade 0,0 a 0,20 m, de Argissolo Vermelho (terra firme) e Neossolo Flúvico (várzea). Foram utilizadas, na semeadura, as cultivares: Barrigudinho, Manteiguinha e Felipinho. O delineamento estatístico utilizado foi em blocos completos casualizados, em esquema fatorial 2x3, com quatro repetições. Foram avaliadas as seguintes características: altura da planta, diâmetro do coleto, biomassa seca e verde da parte aérea e radicular. Verificou-se que o solo de várzea é mais propício ao cultivo do

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Caracterização e classificação de gleissolos da várzea do rio Solimões (Manacapuru e Iranduba), Amazonas, Brasil

Cited by 25 publications

References 7 publications

Characterization and Classification of Floodplain Soils in the Porto Alegre Metropolitan Region, Rs, Brazil

Characterization and Classification of Floodplain Soils in the Porto Alegre Metropolitan Region, Rs, Brazil

Spatial Disaggregation of Multi-Component Soil Map Units Using Legacy Data and a Tree-Based Algorithm in Southern Brazil

Growth of cowpea cultivars in upland and lowland soils

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