Dispersão de argilas em solos afetados por sais

Paes, Jefferson Luiz de Aguiar; Ruíz, Hugo Alberto; Fernandes, Raphael Bragança Alves; Freire, Maria Betânia Galvão dos Santos; Barros, Maria de F. C.; Rocha, Gabriel Cipriano

doi:10.1590/s1415-43662013001100002

Cited by 3 publications

(4 citation statements)

References 17 publications

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“…Thus, the standardized score of this indicator was not reduced (Figure 1). The soil of the experimental area, dystroferric Red Latosol, has good physical characteristics and will hardly be affected by problems related to sodium (Almeida Neto et al, 2009), differently from other soil classes (Paes et al, 2013).…”

Section: Ementioning

confidence: 99%

“…However, TDS has saline-sodic characteristics that can compromise the agronomic quality of the soil. In this context, increment in Na + and the consequent elevation in exchangeable sodium percentage (ESP) favor the destructuration of the soil, with effect on its aggregated particles through the reduction in weighted mean diameter (WMD), increase in clay dispersion and negative alterations in hydraulic conductivity (Almeida Neto et al, 2009;Paes et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Soil attributes and quality under treated domestic sewage irrigation in sugarcane

Barbosa

Matsura

Santos

et al. 2018

Rev. bras. eng. agríc. ambient.

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A B S T R A C TUsing domestic sewage to irrigate and supply nutrients to plants is a sustainable practice; however, due to the physical and chemical properties of the domestic sewage, soil attributes and quality may be changed with its application. The aim of this study was to evaluate soil quality after two cycles of sugarcane irrigated with treated domestic sewage and surface reservoir water via subsurface drip irrigation, with and without nutritional supplementation by fertigation, and a non-irrigated control with top-dressing fertilization. Soil quality was established by applying the methodology proposed by Karlen & Stott. Physical, chemical and microbiological indicators were selected to compose the basic soil functions used to determine the quality index. Application of treated domestic sewage with fertigation increased soil electrical conductivity, Na + content and exchangeable sodium percentage. Reservoir water applications with fertigation increased microbial biomass carbon and reduced the metabolic quotient, besides promoting significant effects on soil acidification indicators in comparison to reservoir water irrigation without fertigation. Despite the alteration of some soil attributes, no significant changes in the soil quality index were observed among the treatments.Atributos e qualidade do solo irrigado com esgoto doméstico tratado em cultivo de cana-de-açúcar R E S U M O O uso de esgoto doméstico para irrigação e suprimento nutricional de plantas é prática sustentável; entretanto, devido às propriedades físico-químicas do esgoto doméstico os atributos e a qualidade do solo podem ser alterados. Assim, o estudo objetivou avaliar os atributos e a qualidade do solo após dois ciclos de cana-de-açúcar irrigada com esgoto doméstico tratado e água de reservatório, com e sem fertigação complementar, e testemunha não irrigada. A qualidade do solo foi estabelecida com a aplicação da metodologia proposta por Karlen & Stott. Foram selecionados indicadores físicos, químicos e microbiológicos para compor as funções básicas do solo adotadas no índice de qualidade. A aplicação de esgoto doméstico tratado com fertigação elevou a condutividade elétrica do extrato saturado, o teor de Na + e a porcentagem de sódio trocável. O tratamento com água do reservatório e fertigação, elevou o carbono da biomassa microbiana e reduziu o quociente metabólico, além de promover efeitos significativos nos indicadores de acidificação do solo em comparação ao tratamento sem fertigação. Apesar das alterações de alguns atributos do solo, não foi constatado efeitos significativos no índice de qualidade do solo entre os tratamentos.

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Section: Ementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Soil attributes and quality under treated domestic sewage irrigation in sugarcane

Barbosa

Matsura

Santos

et al. 2018

Rev. bras. eng. agríc. ambient.

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“…A aplicação do lodo de esgoto em solos agrícolas pode aumentar o teor de sódio do solo, podendo afetar a absorção de água e de nutrientes pelas plantas, em razão do aumento da pressão osmótica da solução do solo, ou indiretamente, pelo seu efeito dispersante sobre as argilas, causando desestruturação do solo e prejudicando a infiltração de água, aeração e crescimento das raízes (Garcia et al, 2009;Paes et al, 2013;Paes et al, 2014).…”

Section: Introductionunclassified

Teores de metais pesados e sódio no solo e em cultivo de girassol adubado com lodo de esgoto

Alves

Albuquerque

Sampaio

et al. 2021

RSD

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Este trabalho teve como objetivo avaliar o efeito da aplicação de lodo de esgoto sobre os teores de metais pesados e sódio no solo e nas folhas do girassol (Helianthus annuus L.). O experimento foi realizado em área de Nitossolo Háplico do Instituto de Ciências Agrárias da Universidade Federal de Minas Gerais em Montes Claros - MG. Os tratamentos corresponderam a quatro doses de lodo de esgoto da ETE Montes Claros – MG (0; 10; 20 e 30 t ha-1, em base seca), com seis repetições, no delineamento em blocos casualizados. Foram avaliados os teores de Ni, Pb, Cd, Cr, Zn, Cu e Na no solo e na planta. A aplicação de doses de até 30 t ha-1 de lodo de esgoto na adubação de girassol não influenciou os teores de Ni, Pb, Cd, Cr, Zn, Cu e Na no solo e no tecido foliar da planta, não havendo limitação ao uso agronômico deste resíduo para os elementos citados.

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“…In semiarid regions, salinization can negatively affect soil physical properties. One of the critical processes for soil structure is clay dispersion, which is often aggravated by the excess exchangeable sodium expressed by the exchangeable sodium percentage (ESP) (Spera et al, 2008;Paes et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Hydraulic conductivity in response to exchangeable sodium percentage and solution salt concentration

et al. 2014

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Hydraulic conductivity is determined in laboratory assays to estimate the flow of water in saturated soils. However, the results of this analysis, when using distilled or deionized water, may not correspond to field conditions in soils with high concentrations of soluble salts. This study therefore set out to determine the hydraulic conductivity in laboratory conditions using solutions of different electrical conductivities in six soils representative of the State of Pernambuco, with the exchangeable sodium percentage adjusted in the range of 5-30%. The results showed an increase in hydraulic conductivity with both decreasing exchangeable sodium percentage and increasing electrical conductivity in the solution. The response to the treatments was more pronounced in soils with higher proportion of more active clays. Determination of hydraulic conductivity in laboratory is routinely performed with deionized or distilled water. However, in salt affected soils, these determinations should be carried out using solutions of electrical conductivity different from 0 dS m-1, with values close to those determined in the saturation extracts.

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Dispersão de argilas em solos afetados por sais

Cited by 3 publications

References 17 publications

Soil attributes and quality under treated domestic sewage irrigation in sugarcane

Soil attributes and quality under treated domestic sewage irrigation in sugarcane

Teores de metais pesados e sódio no solo e em cultivo de girassol adubado com lodo de esgoto

Hydraulic conductivity in response to exchangeable sodium percentage and solution salt concentration

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