Soil carbon sequestration to mitigate climate change

Lal, Rattan

doi:10.1016/j.geoderma.2004.01.032

Cited by 2,772 publications

(1,603 citation statements)

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“…Agricultural cultivation has likely decreased soil C stocks by one-half to two-thirds, with a cumulative loss near 30-40 Mg C ha À 1 (ref. 2) that has likely contributed 78 ± 12 Pg of C to the atmosphere as carbon dioxide (CO 2 ) 3 . Lower SOC abundance also has a direct impact on soil productivity.…”

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confidence: 99%

“…3). The most rapid C accumulation is achieved in (sub)tropical aggrading forests or plantations, which have aboveground C accumulation rates as high as 30 Mg ha À 1 yr À 1 (ref.…”

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confidence: 99%

“…Grasses allocate substantial C belowground and can extend their root structures to great depths, leading to thick soil horizons rich in organic matter. Many studies have quantified SOM increases following conversion to grasslands, native prairies and through implementation of conservation tillage, cover crops or perennialization of agroecosystems 3 . Accumulating C in the soil has additional benefits of higher nutrient retention and water-use efficiency-hence improving the sustainability of soil-based agriculture and forestry.…”

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Emerging land use practices rapidly increase soil organic matter

et al. 2015

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“…3). The most rapid C accumulation is achieved in (sub)tropical aggrading forests or plantations, which have aboveground C accumulation rates as high as 30 Mg ha À 1 yr À 1 (ref.…”

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“…Besides the physical, chemical and biological disturbance of the soil, this also contributes to the global warming by CO 2 emission since the soil organic matter (SOM) is the greatest C reserve in the earth ecosystem (Silva & Mendonça, 2007), and, in global terms, it is considered the third major C compartment, after the ocean and the geological partitions -mainly petroleum, natural gas and mineral coal (Lal, 2004). Moreover, the permanence of eucalyptus stumps in the field after cutting can lead to changes in the horizontal and vertical distribution of nutrient concentrations, SOC and SOM fractions during the growth cycle.…”

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Soil fertility, organic carbon and fractions of the organic matter at different distances from eucalyptus stumps

Faria

Barros²,

Novais³

et al. 2009

Rev. Bras. Ciênc. Solo

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SUMMARYKnowledge on variations in vertical, horizontal and temporal characteristics of the soil chemical properties under eucalyptus stumps left in the soil is of fundamental importance for the management of subsequent crops. The objective of this work was to evaluate the effect of eucalyptus stumps (ES) left after cutting on the spatial variability of chemical characteristics in a dystrophic Yellow Argisol in the eastern coastal plain region of Brazil. For this purpose, ES left for 31 and 54 months were selected in two experimental areas with similar characteristics, to assess the decomposition effects of the stumps on soil chemical attributes. Soil samples were collected directly around these ES, and at distances of 30, 60, 90, 120 and 150 cm away from them, in the layers 0-10, 10-20 and 20-40 cm along the row of ES, which is in-between the rows of eucalyptus trees of a new plantation, grown at a spacing of 3 x 3 m. The soil was sampled in five replications in plots of 900 m 2 each and the samples analyzed for pH, available P and K (Mehlich-1), exchangeable Al, Ca and Mg, total organic carbon (TOC) and C content in humic substances (HS) and in the free light fraction. The pH values and P, K, Ca 2+ , Mg 2+ and Al 3+ contents varied between the soil layers with increasing distance from the 31 and 54-monthold stumps. The highest pH, P, K, Ca 2+ and Mg 2+ values and the lowest Al 3+ content were found in the surface soil layer. The TOC of the various fractions of soil organic matter decreased with increasing distance from the 31 and 54-month-old ES in the 0-10 and 10-20 cm layers, indicating that the root (and stump) cycling and rhizodeposition contribute to maintain soil organic matter. The C contents of the free light fraction, of the HS and TOC fractions were higher in the topsoil layer under the ES left for 31 months due to the higher clay levels of this layer, than in those found under the 54-month-old stumps. However, highest C levels of the different fractions of soil organic matter in the topsoil layer reflect the deposition and maintenance of forest residues on the soil surface, mainly after forest harvest.Index terms: nutrients, humic substances, spatial variability. RESUMO: FERTILIDADE DO SOLO, CARBONO ORGÂNICO E FRAÇÕES DA MATÉRIA ORGÂNICA EM DIFERENTES DISTÂNCIAS DA CEPA DE EUCALIPTOO conhecimento das variações vertical, horizontal e temporal de características químicas do solo sob cepas remanescentes de eucalipto é de fundamental importância para o manejo de cultivos subsequentes. O objetivo deste trabalho foi avaliar o efeito de cepas remanescentes de eucalipto (CRE) na variabilidade espacial de características químicas em um Argissolo Amarelo distrófico típico localizado na região litorânea do Espírito Santo. Para isso, foram selecionadas CRE com 31 e 54 meses de idade, em duas áreas experimentais com características semelhantes, a fim de avaliar os efeitos da decomposição delas sobre características químicas do solo. Dessa forma, amostras de solo foram coletadas ao redor dessas CRE e nas distância...

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“…A erosão acelerada afeta as reservas e fluxos de carbono porque quebra os agregados, expõe o carbono aos elementos climáticos e mineraliza a matéria orgânica (SIVAKUMAR, 2007). Assim, a queda do sequestro do carbono orgânico contribui com o aumento do carbono na atmosfera, portanto, a erosão pode incrementar o aquecimento global (HUMBERTO, 2008;LAL, 2004).…”

Section: Impactos Da Erosãounclassified

Aplicação da dendrogeomorfologia na caracterização e datação de processos erosivos em voçorocas na região de Piracicaba, SP

Castillo¹

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Soil carbon sequestration to mitigate climate change

Cited by 2,772 publications

References 96 publications

Emerging land use practices rapidly increase soil organic matter

Emerging land use practices rapidly increase soil organic matter

Soil fertility, organic carbon and fractions of the organic matter at different distances from eucalyptus stumps

Aplicação da dendrogeomorfologia na caracterização e datação de processos erosivos em voçorocas na região de Piracicaba, SP

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