2017
DOI: 10.1590/1678-992x-2015-0495
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High fire temperature changes soil aggregate stability in slash-and-burn agricultural systems

Abstract: Fire is a key controlling factor in ecosystem dynamics worldwide, especially, in tropical areas under slash-and-burn agricultural systems. Farmers use fire as a tool to clean the land, and benefit from nutrient enrichment from ash-soil heating. However, fire can cause some detrimental effects on soil systems, such as organic carbon depletion, increased soil erodibility, and changes to aggregate stability. In this study, an experimental fire was applied to a plot of land following the local traditional practice… Show more

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Cited by 31 publications
(20 citation statements)
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“…A higher ASI was expected in the sys- tem with greater species diversity (AC), including the reference area (CR), since both could promote a greater diversity of root exudates of different compositions, guaranteeing greater carbon source diversity in the soil system (Silva et al, 2016a). In addition to the biological diversity of natural systems that improves the stability of soil aggregates, another controversial aspect refers to spontaneous burning in the Cerrado that may or may not promote an increase in the stability of these aggregates (Thomaz, 2017;Hobley et al, 2017;Zhang et al, 2017). Despite this, the ASI value found for the management systems lies within the range commonly found for tropical soils (82 ± 6 %) (Thomaz, 2017).…”
Section: Aggregate Stability Index (Asi)mentioning
confidence: 99%
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“…A higher ASI was expected in the sys- tem with greater species diversity (AC), including the reference area (CR), since both could promote a greater diversity of root exudates of different compositions, guaranteeing greater carbon source diversity in the soil system (Silva et al, 2016a). In addition to the biological diversity of natural systems that improves the stability of soil aggregates, another controversial aspect refers to spontaneous burning in the Cerrado that may or may not promote an increase in the stability of these aggregates (Thomaz, 2017;Hobley et al, 2017;Zhang et al, 2017). Despite this, the ASI value found for the management systems lies within the range commonly found for tropical soils (82 ± 6 %) (Thomaz, 2017).…”
Section: Aggregate Stability Index (Asi)mentioning
confidence: 99%
“…In addition to the biological diversity of natural systems that improves the stability of soil aggregates, another controversial aspect refers to spontaneous burning in the Cerrado that may or may not promote an increase in the stability of these aggregates (Thomaz, 2017;Hobley et al, 2017;Zhang et al, 2017). Despite this, the ASI value found for the management systems lies within the range commonly found for tropical soils (82 ± 6 %) (Thomaz, 2017). This may also be indicative of high resilience of the soils in these areas, which, according to history, have been cultivated for at least 20 years ( Table 2).…”
Section: Aggregate Stability Index (Asi)mentioning
confidence: 99%
“…Após a ação do fogo, a biomassa vegetal acima e abaixo do solo pode ser queimada, liberando gases de efeito estufa como dióxido de carbono, metano e óxido nitroso, resultando também em alterações na ciclagem de nutrientes principalmente devido a redução da formação de serapilheira, mudanças na temperatura devido a lacunas na vegetação da camada herbácea e consequentemente, mudanças no teor de umidade do solo (Belmok et al, 2019). Em sistemas influenciados por fogo severo são esperadas alterações críticas nas propriedades físicas, químicas e mineralógicas do solo (Thomaz, 2017).…”
Section: Precipitaçãounclassified
“…Em todos os ecossistemas, o fogo atua como um dos principais agentes modificadores da biodiversidade local, gerando impactos diretos sobre a fauna e flora, afetando os padrões da paisagem, a composição das espécies, podendo até mudar toda a estrutura da comunidade, influenciando o fluxo de energia e os ciclos biogeoquímicos (Thomaz, 2017). No solo, o fogo potencializa os processos erosivos por meio de uma combinação de oxidação, volatilização, transporte de cinzas e lixiviação (Clemente et al, 2017;Chiang e Ulloa, 2019).…”
Section: Introductionunclassified
“…Em ambos os procedimentos a distribuição e quantidade de agregados (peso-volume) de uma peneira para outra foi obtida por meio da razão entre a quantidade de agregados retidos em cada peneira pelo total de material avaliado. Os índices dos agregados: diâmetro médio ponderado e estabilidade de agregados em porcentagem, foram obtidos por meio das equações 2 e 3 abaixo: de acordo com o manejo do solo (Castro Filho et al, 2002;Thomaz, 2017).…”
Section: Delineamento Experimental E Avaliaçõesunclassified