Water-dispersible clay in soils treated with sewage sludge

Filho, João Tavares; Barbosa, Graziela Moraes de Césare; Ribon, Adriana Aparecida

doi:10.1590/s0100-06832010000500005

Cited by 18 publications

(22 citation statements)

References 20 publications

(30 reference statements)

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“…Convém destacar que o desenvolvimento da estrutura do solo inicia-se com o fenômeno da floculação, porém, somente após a ação prolongada da matéria orgânica e de compostos do solo, é que adquire a estabilidade necessária (Bayer & Mielniczuk, 2008). Entretanto, em Latossolo Vermelho e Latossolo Vermelho-Amarelo, os quais possuem naturalmente alto grau de floculação, Tavares Filho et al (2010) não constataram diferenças significativas, quanto aos teores de argila dispersa em água, entre solos adubados com lodo de esgoto, em doses de até 48 t ha -1 , e solos não adubados com o resíduo orgânico.…”

Section: Variávelunclassified

Atributos físicos do solo, adubado com lodo de esgoto e silicato de cálcio e magnésio

Maio¹,

Sampaio²,

Nascimento³

et al. 2011

Rev. Ceres

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Physical attributes of soil fertilized with sewage sludge and with calcium and magnesium silicatesThis study aimed to evaluate the effect of sewage sludge and calcium and magnesium silicate on the physical attributes of a Cambisol cultivated with sunflower. The treatments were arranged in a factorial (4 x 2) + 1, corresponding to four doses of sewage sludge (0, 6.25, 12.5 and 18.5 t ha -1 , in dry basis), two doses of calcium and magnesium silicate (0 and 240 g m -1 ) and an additional treatment with chemical fertilizers. The experimental design was randomized blocks with three replications. After 150 days of fertilization, were collected soil samples at depth of 0-20 and 20-40 cm for the evaluation of bulk density, particle density, total porosity, water dispersible clay, flocculation index, aggregate stability index, mean weight diameter, geometric mean diameter and soil penetration resistance. The additional treatment, Atributos físicos do solo, adubado com lodo de esgoto e silicato de cálcio e magnésioEste trabalho teve como objetivo avaliar o efeito da aplicação de lodo de esgoto e de silicato de cálcio e magnésio sobre os atributos físicos de um Cambissolo Háplico, cultivado com girassol. Os tratamentos foram distribuídos em esquema fatorial (4 x 2) + 1, correspondendo a quatro doses de lodo de esgoto desidratado (0; 6,25; 12,5 e 18,5 t ha -1 ), duas doses de silicato de cálcio e magnésio (0 e 240 g m -1 ) e um tratamento adicional com adubação mineral. O delineamento utilizado foi em blocos casualizados, com três repetições. Após 150 dias da adubação, coletaram-se amostras de solos, nas camadas de 0-20 e 20-40 cm, para avaliação da densidade aparente, densidade de partícula, porosidade total, grau de dispersão, grau de floculação, índice de estabilidade de agregados, diâmetro médio ponderado, diâmetro médio geométrico e resistência do solo à penetração. O tratamento adicional, correspondente à adubação mineral, não diferiu dos tratamentos correspondentes às adubações com lodo de esgoto e silicato de cálcio e magnésio, em relação aos atributos físicos do solo. Para o silicato de cálcio e magnésio, também não se constataram diferenças nos atributos físicos do solo, entre a dose zero e 240 g m -1 . Por outro lado, a aplicação de lodo de esgoto diminuiu o grau de dispersão de argila e aumentou a porosidade total do solo, o grau de floculação de argilas e o índice de estabilidade de agregados a úmido, não tendo, porém, influenciado os demais atributos físicos.Palavras-chave: biossólido, matéria orgânica, densidade do solo, estabilidade de agregados.

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Section: Variávelunclassified

Atributos físicos do solo, adubado com lodo de esgoto e silicato de cálcio e magnésio

Maio¹,

Sampaio²,

Nascimento³

et al. 2011

Rev. Ceres

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“…Benites and Mendonça (1998) observed that the addition of more than 15 Mg ha À1 of non-humified organic matter (manure) to soil changed the superficial electric potential and increased the dispersible clay content. In addition, Tavares Filho et al (2010) observed that doses of up to 48 Mg ha À1 sewage sludge increased the DpH (pH H 2 O -pH KCl ), indicating a change in the superficial electric potential, while not demonstrating an increase in clay dispersion compared to no application of sewage sludge.…”

Section: Introductionmentioning

confidence: 99%

“…Soil aggregates are used as indicators of soil quality (Vrdoljak and Sposito, 2002) and can therefore be used to evaluate the effects of manure and sewage sludge disposal on soil quality (Hati et al, 2006;Lee et al, 2009;Bandyopadhyay et al, 2010;Tavares Filho et al, 2010;Villemin, 2011 Watteau et al, 2012). Over time, soil fertilisation with manure or sewage sludge can improve the physical properties of soil (Hati et al, 2006;Bandyopadhyay et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Aggregation and clay dispersion of an oxisol treated with swine and poultry manures

Barbosa

Oliveira

Miyazawa

et al. 2015

Soil and Tillage Research

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“…Soil flocculation is associated with aggregation, because soil reaction to its content of charges is associated with dispersion, and these are physicochemical factors. Soil dispersion is also dependent on its mineralogy and electrochemical potential (ALBUQUERQUE et al, 2002;BARBOSA;RIBON, 2010). To understand this type of alteration, parameters such as ΔpH (pH KCl -pH H 2 O) and the point of zero charge (PZC) are used in these studies, which show the importance of these interactions of charges in soil flocculation, and consequently in its structure.…”

Section: Introductionmentioning

confidence: 99%

Toposequences of soils developed on basaltic rocks: physicochemical attributes

Gonçalves¹,

Filho²,

Vendrame³

et al. 2013

RCA

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Soils are formed in a structural continuity of layers along a toposequence. The objective of this study was to characterize the chemical and physical properties of soils in two topossequences derived from basaltic rocks in the state of Parana, with different slopes, aiming to identify the relationships between their attributes, relief, and parent material. We studied two toposequences, with differentiated reliefs, developed on parent material consisting of vesicular and aphanitic basaltic rocks. The following physical properties were evaluated: texture, bulk density, particle density, macroporosity, microporosity, aggregate stability in water, degree of dispersion, and degree of flocculation. Chemical analyses were carried out for determination of Ca, Mg, K, P, Al, H+Al, C, and ΔpH. The results were submitted to principal component analysis (PCA) to obtain the correlation circles. In the circle of eigenvectors, in the slope with soft undulating relief, most vectors are located in the negative sector, both for physical and chemical properties with the latter being closer together. Also, the relationships between Ca, Mg, K and aluminum are evident. This way, chemical and physical properties are listed in the two slopes, and the level of correlation depends on the existing interactions. In addition, young soils with different characteristics and behavior were different from the others. Effective depth and structure were limiting attributes, but other favorable attributes were observed. The relationships among the attributes are differentiated along the slopes, and are influenced by the physicochemical nature of the geological substrate. RESUMO: Os solos são formados em uma continuidade estrutural das camadas ao longo da topossequência. Assim, o objetivo deste trabalho foi caracterizar atributos químicos e físicos de solos em duas topossequências, originados de rochas basálticas, no Estado do

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Water-dispersible clay in soils treated with sewage sludge

Cited by 18 publications

References 20 publications

Atributos físicos do solo, adubado com lodo de esgoto e silicato de cálcio e magnésio

Atributos físicos do solo, adubado com lodo de esgoto e silicato de cálcio e magnésio

Aggregation and clay dispersion of an oxisol treated with swine and poultry manures

Toposequences of soils developed on basaltic rocks: physicochemical attributes

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