Agregação Do Solo E Atributos Químicos Em Áreas Com Diferentes Coberturas Vegetais

Schultz, Nivaldo; Pinto, Luiz Alberto da Silva Rodrigues; Lima, Sandra de Santana; Ziviani, Melania Merlo; Assunção, Shirlei Almeida; Pereira, Marcos Gervásio

doi:10.22533/at.ed.1781917101

Cited by 9 publications

(6 citation statements)

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“…Among the formation pathways, the results of POC are similar to those observed by Rossi et al (2016) and Schultz et al (2019). The higher contents of POC in biogenic aggregates (Table 3) indicate the predominance of material with greater lability compared to physicogenic aggregates (Loss et al, 2014), and the incorporation or maintenance of this material is favored in biogenic aggregates due to the agents responsible for its formation (soil fauna and plant roots) (Loss et al, 2014;.…”

Section: Poc Contentssupporting

confidence: 65%

“…Other authors have also found that higher contents of MAOC were quantified in biogenic aggregates, when compared to physicogenic aggregates (Loss et al, 2014;Rossi et al, 2016;Schultz et al, 2019). Comparing the formation pathways, Ferreira et al (2020) found differences in MAOC contents only in the rainy season, with higher values of this fraction in biogenic aggregates.…”

Section: Maoc Contentsmentioning

confidence: 82%

“…The authors demonstrated that both fractions are basically composed of root fragments and organisms of soil fauna, hyphae and decomposing plant residues. In this study, the results of FLFC and POC may be associated with the potential of the formation pathways for carbon sequestration, in which the type of carbon stored by biogenic aggregates is more soluble than the more recalcitrant carbon stored in physicogenic aggregates (Pinto et al, 2019).…”

Section: Flfc Contentsmentioning

confidence: 97%

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Soil organic matter of aggregates physicogenic and biogenic in areas under no-tillage system in the Cerrado, Brazil

Pinto

Ziviani

Morais

et al. 2021

RSD

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The aim of this study was to evaluate i) the different cover crops contribution used in no-tillage system (NT) to biogenic aggregation; and ii) the influence of aggregate formation pathways on the compartmentalization and the soil organic carbon origin. Two areas managed under NT with different implementation times (6 and 18 years, NT06 and NT18, respectively) and cover crops were evaluated, totaling six sampling areas: NT06, millet (NT06MI); NT06, brachiaria (NT06BR); NT06, sunn hemp (NT06SH); NT18, millet (NT18MI); NT18, brachiaria (NT18BR); NT18, and sunn hemp (NT18SH). In each sampling area, five pseudo-replicates were collected in the 0.00-0.05 and 0.05-0.10 m layers. The samples were air-dried and sieved using sieves with 9.7 and 8.0 mm mesh, and the aggregates retained within this interval were selected. The percentage of each type of aggregate (physicogenic and biogenic) was quantified. Total organic carbon (TOC) and the natural abundance of δ13C (‰) were analyzed and the physical fractionations of SOM were performed: particulate organic carbon (POC) and mineral-associated organic carbon (MAOC) and density fractionation (free light fraction carbon, FLFC). Physicogenic aggregates were quantified in greater proportion, except for the areas of NT06BR and NT18BR in the 0.00-0.05 m layer. The biogenic aggregates showed the highest contents of TOC, POC, MAOC, FLFC and more negative values of δ13C. The use of grasses, especially Brachiaria spp., as cover plants in NT after 6 and 18 years of adoption favors the formation of aggregates through the biogenic pathway and they influence the compartmentalization and origin of stored organic carbon.

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Section: Poc Contentssupporting

confidence: 65%

Section: Maoc Contentsmentioning

confidence: 82%

Section: Flfc Contentsmentioning

confidence: 97%

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Soil organic matter of aggregates physicogenic and biogenic in areas under no-tillage system in the Cerrado, Brazil

Pinto

Ziviani

Morais

et al. 2021

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“…Additionally, Batista et al (2013), Ferreira et al (2020), Loss et al (2014), Pinto et al (2021), Pulleman et al (2005), Rossi et al (2016) and Schultz et al (2019) found that monitoring agricultural areas in production systems is more accurate when the SOM is evaluated using physical fractionation methods, as these are of low cost, and are highly practical and effi cient in the separation process due to the action of density and ultrasonic energy, the activity of dispersing agents and to sieving (CAMBARDELLA; ELLIOTT, 1993;CONCEIÇÃO et al, 2008;GAVINELLI et al, 1995;SOHI et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Organic matter fractions of soil aggregates under agroecological production systems in the southeast of Brazil

Rossi,

Pinto,

Souza

et al. 2024

RCA

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Agroecological management is considered a model of sustainable agriculture that off ers social, environmental and economic benefi ts. The hypotheses of this study were that agroecological production systems can promote changes in the physical fractions of soil organic matter (SOM) associated with aggregates of diff erent origins, and that the greater diversity of plant species in the production system may favour an increase in the carbon concentration of these aggregates. The aim of this study was to a) determine the mass of the free light fraction (FLF), intra-aggregate light fraction (ILF) and light organic matter fraction (LOM) of biogenic and physiogenic soil aggregates; and b) quantify the organic carbon content of the three light SOM fractions and the residual particulate SOM fraction. Five production systems were evaluated: AgF -Agroforestry system; CSun -Coff ee grown in full sun; CSha -Coff ee grown in shade; FLE -Flemingia grown in alleys; and NT -No-tillage.The aggregates were separated, identifi ed and classifi ed according to their origin or formation pathway into biogenic (formed by biological processes) or physiogenic aggregates (resulting from chemical and physical actions). From these, the mass and carbon content of the FLF, ILF, LOM and residual particulate fractions were quantifi ed. The greater diversity of plant species found in the AgF system has not yet favoured an increase in the carbon content of the aggregates. The longer set-up time and the management practices of the CSun system has led to an increase in the carbon content of the organic fractions of the aggregates (3.44-1.63 g kg -1 for C-LOM; 1.93-1.13 g kg -1 for C-FLF). The lowest overall mean values for LOM and ILF were found mainly in the aggregates of the NT system (1.22-1.67 and 1.55-2.20 g kg -1 , respectively), being associated with the shorter time and greater mobilisation of the arable layer. Biogenic aggregation aff orded the highest overall mean values for LOM, and increased the mass of the light fractions (15.5%-27.8% for FLF; 23.4%-8.0% for ILF) and the carbon in the C-LOM, C-FLF and residual particulate fractions (42.3%, 12.9%, and 35.0%, respectively) in the surface layer, suggesting an improvement in soil quality.

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“…Em áreas de floresta secundária em estágio avançadode Rossi et al (2016) observaram que os resultados de DMP foram influenciados apenas nos sistemas manejo e não dos diferentes tipos de agregados avaliados. Também nesse sistema de manejo,Schultz et al (2019) não observaram diferenças nos valores de DMP entre as vias de formação avaliadas.Os resultados da caracterização dos atributos químicos nos diferentes tipos de agregados são apresentados na Tabela 1. As maiores variações foram verificadas com maior expressão entre as pedoformas do que entre as vias de formação, principalmente para Ca 2+ , soma de bases trocáveis (S), total de cátions adsorvidos (T) e saturação por bases (V).Na comparação entre as pedoformas, em CX foram quantificados os maiores teores de Ca 2+ e valores S, T e V em agregados fisiogênicos.…”

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Produtividade Da Água De Irrigação Em Uma Região Semiárida: Um Estudo Na Bacia Do Salgado – Ce, Brasil

Frizzone¹,

Melo²,

Lima³

et al. 2021

Engenharia Agronômica: Ambientes Agrícolas E Seus Campos De Atuação 3

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Direitos para esta edição cedidos à Atena Editora pelos autores. Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição-Não-Comercial-NãoDerivativos 4.0 Internacional (CC BY-NC-ND 4.0).O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores, inclusive não representam necessariamente a posição oficial da Atena Editora. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais. Todos os manuscritos foram previamente submetidos à avaliação cega pelos pares, membros do Conselho Editorial desta Editora, tendo sido aprovados para a publicação com base em critérios de neutralidade e imparcialidade acadêmica.A Atena Editora é comprometida em garantir a integridade editorial em todas as etapas do processo de publicação, evitando plágio, dados ou resultados fraudulentos e impedindo que interesses financeiros comprometam os padrões éticos da publicação. Situações suspeitas de má conduta científica serão investigadas sob o mais alto padrão de rigor acadêmico e ético.

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Agregação Do Solo E Atributos Químicos Em Áreas Com Diferentes Coberturas Vegetais

Cited by 9 publications

References 0 publications

Soil organic matter of aggregates physicogenic and biogenic in areas under no-tillage system in the Cerrado, Brazil

Soil organic matter of aggregates physicogenic and biogenic in areas under no-tillage system in the Cerrado, Brazil

Organic matter fractions of soil aggregates under agroecological production systems in the southeast of Brazil

Produtividade Da Água De Irrigação Em Uma Região Semiárida: Um Estudo Na Bacia Do Salgado – Ce, Brasil

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