Lime‐induced loss of soil organic carbon and effect on aggregate stability

Chan, K. Y.; Heenan, DP

doi:10.2136/sssaj1999.6361841x

Cited by 129 publications

(82 citation statements)

References 11 publications

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“…In a recent review, Paradelo et al (2015) concluded that while CaCO 3 addition had a clear positive effect on soil structure, its effect on occluded SOC stocks was uncertain. Positive (Egan et al 2018;Muneer and Oades 1989a, b), non-existent (Paradelo et al 2016) or negative effects (Chan and Heenan 1999) of CaCO 3 -amendment on occluded SOC have indeed been reported. In some instances, it may be difficult to disentangle the integrative effects of agricultural management from the simple effects of CaCO 3 additions.…”

Section: The Effects Of Carbonate On Aggregatesmentioning

confidence: 91%

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Calcium-mediated stabilisation of soil organic carbon

2017

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Soils play an essential role in the global cycling of carbon and understanding the stabilisation mechanisms behind the preservation of soil organic carbon (SOC) pools is of globally recognised significance. Until recently, research into SOC stabilisation has predominantly focused on acidic soil environments and the interactions between SOC and aluminium (Al) or iron (Fe). The interactions between SOC and calcium (Ca) have typically received less attention, with fewer studies conducted in alkaline soils. Although it has widely been established that exchangeable Ca (Ca Exch ) positively correlates with SOC concentration and its resistance to oxidation, the exact mechanisms behind this relationship remain largely unidentified. This synthesis paper critically assesses available evidence on the potential role of Ca in the stabilisation of SOC and identifies research topics that warrant further investigation. Contrary to the common view of the chemistry of base cations in soils, chemical modelling indicates that Ca 2? can readily exchange its hydration shell and create inner sphere complexes with organic functional groups. This review therefore argues that both inner-and outer-sphere bridging by Ca 2? can play an active role in the stabilisation of SOC. Calcium carbonate (CaCO 3 ) can influence occluded SOC stability through its role in the stabilisation of aggregates; however, it could also play an unaccounted role in the direct sorption and inclusion of SOC. Finally, this review highlights the importance of pH as a potential predictor of SOC stabilisation mechanisms mediated by Al-or Fe-to Ca, and their respective effects on SOC dynamics.

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Section: The Effects Of Carbonate On Aggregatesmentioning

confidence: 91%

“…It would thus be expected that the rate of enzymatic decomposition of SOC would increase when Ca 2? saturates the exchange complex (Andersson et al 1999;Chan and Heenan 1999;Thirukkumaran and Morrison 1996). This could be the case in the organic (litter) layer (Minick et al 2017), but is generally not observed in the mineral soil.…”

Section: Ca-soc Interactionsmentioning

confidence: 97%

Calcium-mediated stabilisation of soil organic carbon

2017

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“…Chan and Heenan [87] suggested that the high microbial biomass present in the organic soil activates rates of decomposition in organic soils treated with lime resulting into reduction in pH value. In addition, clay minerals are in lesser quantity in the organic soil.…”

Section: Effect Of Organic Materialsmentioning

confidence: 99%

Fundamentals of soil stabilization

2017

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“…No entanto, de acordo com Chan & Heenan (1999), Albuquerque et al (2000Albuquerque et al ( , 2003, Costa et al (2004) e Griève et al (2005), o aporte de C e o aumento da atividade microbiana ou do sistema radicular das culturas, resultantes da aplicação de corretivos da acidez do solo, contribuem para a manutenção da estabilidade de agregados, o que poderia ter compensado o efeito dispersante dos corretivos. Assim, os benefícios proporcionados pelos corretivos à produção de matéria seca, durante as duas safras agrícolas (Tabela 2), pode ter minimizado o efeito deletério da dispersão da argila, que teria culminado na redução da macroporosidade (Tabela 3).…”

Section: Resultsunclassified

Propriedades físicas do solo em sistemas de rotação de culturas conforme o uso de corretivos da acidez

Castro

Calonego

Crusciol

2011

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o efeito de sistemas de rotação de culturas e de corretivos da acidez nas propriedades físicas do solo. O experimento foi realizado entre outubro de 2006 e julho de 2008, em Botucatu, SP, em blocos ao acaso, com parcelas subdivididas e oito repetições. As parcelas foram constituídas por quatro sistemas de rotação: soja/pousio/milho/pousio, soja/aveia-branca/milho/feijão, soja/milheto/milho/ guandu e soja/braquiária/milho/braquiária. As subparcelas consistiram do tratamento testemunha, sem correção, e da aplicação de 3,8 Mg ha -1 de calcário dolomítico (PRNT = 90%) ou de 4,1 Mg ha -1 de silicato de cálcio e magnésio (PRNT = 80%), na superfície de um Latossolo Vermelho argiloso. Foram determinadas: estabilidade de agregados, densidade do solo, porosidade total, macro e microporosidade, resistência do solo à penetração e umidade do solo. A aplicação dos corretivos de acidez em superfície não reduz a agregação do solo e aumenta a macroporosidade até 0,20 m de profundidade, após aplicação de silicato, e até 0,10 m, após aplicação de calcário. A manutenção do solo em pousio, na entressafra, prejudica a estruturação do solo, reduz a estabilidade de agregados e aumenta a resistência à penetração nas camadas superficiais. A semeadura de braquiária, entre as safras de verão, aumenta a estabilidade de agregados até 0,10 m de profundidade.Termos para indexação: calagem, estabilidade de agregados, plantas de cobertura, plantio direto, pousio, silicatagem. Soil physical properties in crop rotation systems as affected by liming materialsAbstract -The objective of this work was to evaluate the effects of crop rotation systems and liming materials on soil physical properties. The experiment was carried out from October 2006 to July 2008, in Botucatu, SP, Brazil, in a completely randomized block design in a split-plot arrangement with eight replicates. Main plots consisted of four crop rotation systems: soybean/fallow/maize/fallow, soybean/white-oat/maize/bean, soybean/millet/maize/pigeon pea and soybean/signal grass/maize/signal grass. Subplots consisted of the control treatment, without soil correction, and of the application of 3.8 Mg ha -1 of dolomitic lime (ECC = 90%) or 4.1 Mg ha -1 of calcium-magnesium silicate (ECC = 80%), on the surface of a clayed Rhodic Ferralsol. Aggregate stability, soil bulk density, total porosity, macro and microporosity, soil penetration resistance and moisture content were evaluated. Superficial application of the lime materials does not reduce soil aggregation and increases macroporosity down to 0.20 m, with calcium-magnesium silicate application, and to 0.10 m, when lime is applied. Soil under fallow in off-season decreases aggregate stability and increases soil penetration resistance in upper layers. The cultivation of Congo signal grass, between summer crops, increases aggregate stability down to 0.10-m depth.

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Lime‐induced loss of soil organic carbon and effect on aggregate stability

Cited by 129 publications

References 11 publications

Calcium-mediated stabilisation of soil organic carbon

Calcium-mediated stabilisation of soil organic carbon

Fundamentals of soil stabilization

Propriedades físicas do solo em sistemas de rotação de culturas conforme o uso de corretivos da acidez

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