Estoques de carbono e qualidade da matéria orgânica do solo em áreas cultivadas com cana-de-açúcar

Signor, Diana; Zani, Caio Fernandes; Paladini, Aline Albertini; Deon, Marcos; Cerri, Carlos Eduardo Pellegrino

doi:10.1590/s0100-06832014000500005

Cited by 30 publications

(31 citation statements)

References 22 publications

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“…In order to adequately compare the calculated inventories between the areas, it was necessary to make comparisons between equal masses of soil, adjusting the values of the layers used in the calculations using the method of Ellert and Bettany (1995). For corrections for the equivalent soil mass, the native Forest area was considered the reference area and calculated by the equation: Corrected depth (cm) = (MDref / MDcor) x DEPcor, where: MDref represents the mean density of the reference area (g cm -3 ); MDcor is the mean density of the area being corrected (g cm -3 ); and DEPcor is the original depth of the layer being corrected (cm), as suggested by Signor et al (2014), with small modifications in relation to the average density instead of the weighted one.…”

Section: Collection Of Soil Samples and Assessmentsmentioning

confidence: 99%

Soil organic matter fractions and carbon management index under integrated crop-livestock system

et al. 2020

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The objective of this work was to evaluate the carbon content of the physical, chemical and oxidizable fractions of soil organic matter (SOM) and to calculate the carbon management index (CMI) in an area managed under an integrated crop-livestock system (ICLS) in the western region of Paraná - Brazil. The experiment was carried out at the experimental farm, belonging to the Universidade Estadual do Oeste do Paraná. Seventeen areas, which are managed in different ways, fifteen in ICLS and two areas of controls (Forest and Haymaking), using the design divided with two nested controls, with three replications were evaluated. Deformed and undisturbed soil samples were collected from all the areas to determine the total organic carbon (TOC), carbon stock, the physical, chemical and oxidizable fractions of SOM and the CMI in the layers of 0-0.05, 0.05-0.1 and 0.1-0.2 m. Little significant changes in the fractions were found for the management of the ICLS area in relation to the Forest and the area of Haymaking, although the Forest presented the best values for most of the studied fractions. It is recommended to adopt sustainable practices, such as ICLS, even though the average fractions tend to take time to match reference areas.

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Section: Collection Of Soil Samples and Assessmentsmentioning

confidence: 99%

Soil organic matter fractions and carbon management index under integrated crop-livestock system

et al. 2020

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“…The dynamics of organic matter is driven by the addition of organic residues of various natures and by the continuous transformation under the action of biological, chemical and physical factors. Signor et al (2014) explain that these changes in soil organic matter can be measured by changes in soil C stock and in its chemical or physical fractions or combinations thereof.…”

Section: Introductionmentioning

confidence: 99%

Carbon Stocks and Soil Organic Matter Quality Under Different of Land Uses in the Maranhense Amazon

Reis¹,

Signor²,

Muniz³

et al. 2018

JAS

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In the face of the traditional model of succession of native environments in pastures or agricultural areas, followed by superpastejo and the concern with emissions of greenhouse gases in the Brazilian Amazon region, this work aims to determine the influence of different land uses on carbon sequestration and soil organic matter changes in the municipality of Pindaré-Mirim, in state of Maranhão. This study evaluated different uses of the soil: native forest; secondary vegetation (capoeira); degraded pasture and CLFI (Crop-Livestock-Forest Integration) system. The deformed and undisturbed samples were collected at depths: 0.00-0.10, 0.10-0.20, 0.20-0.30, 0.30-0.40, 0.40-0.60, 0.60-0.80 and 0.80-1.00 m. Soil densities were determined by the volumetric ring method, the carbon stocks by the carbon content in the soil evaluating the dry combustion, and the accumulated carbon stocks were calculated in 1.00 m. The physical fractions of the organic matter were determined by means of the granulometric method. At depth 0.0-0.10 m, the soil density in the native forest (1.17 g cm -3 ) was lower than the average of degraded pasture (1.40 g cm -3). There was no difference in the carbon content between all the land uses up to 0.40 m depth. The accumulated carbon stocks up to 1.00 m ranged from 49.52 Mg ha -1 to 64.41 Mg ha -1 and were higher in the native forest compared to capoeira and the ICLF system. In relation to the accumulated carbon stock, the native forest and degraded pasture were the ones that obtained the highest levels, followed by the capoeira and the CLFI system.

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“…Técnicas de fracionamento físico da MOS têm possibilitado a identificação do acúmulo de C em compartimentos do solo (Santos et al, 2012;Conceição et al, 2014;Signor et al, 2014). No curto prazo, alterações da proporção das frações lábeis da MOS -como a do C orgânico particulado (COp), C da fração leve livre (FLL) e C da fração leve oclusa (FLO) -podem fornecer informações importantes sobre a sustentabilidade ambiental e a qualidade do solo, e possibilitar correções das estratégias de uso e manejo do solo (Santos et al, 2011).…”

Section: Introductionunclassified

Frações físicas da matéria orgânica em Latossolo cultivado com cana-de-açúcar no Rio Grande do Sul

Kunde

Lima

Silva

et al. 2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar as frações físicas da matéria orgânica do solo (MOS) e o índice de manejo de carbono (IMC), após diferentes períodos de preparo do solo para a implantação de cana-deaçúcar. O estudo foi realizado em Latossolo Vermelho, de textura argilosa, depois de 1, 3 e 5 anos do preparo do solo para a implantação da cultura, com queima da palhada e colheita manual. Como referência, utilizou-se o solo de mata nativa adjacente à área de estudo. Amostras de solo foram coletadas nas camadas de 0,00-0,05, 0,05-0,10 e 0,10-0,20 m, para quantificar o IMC, bem como o C orgânico total, o C particulado, o C associado a minerais e o C das frações leve livre, leve oclusa e pesada da MOS. O preparo do solo associado à queima da palhada na colheita diminuiu o aporte de matéria orgânica fresca ao solo e acelerou a decomposição do compartimento lábil da MOS, com reflexos negativos sobre os estoques das frações físicas do solo. As maiores proporções de C foram verificadas na fração associada a minerais. As frações densimétricas da MOS foram mais sensíveis na detecção de alterações dos estoques, labilidade, índice de labilidade e IMC, nos diferentes tempos de implantação da cultura. As áreas com cana-de-açúcar apresentam IMC inferior a 100, o que indica impacto negativo do cultivo sobre os estoques de matéria orgânica e sobre a qualidade física do solo.Termos para indexação: Saccharum officinarum, fracionamento físico da matéria orgânica, índice de manejo de carbono, labilidade da matéria orgânica, qualidade física do solo. Physical fractions of organic matter in an Oxisol cultivated with sugarcane in the state of Rio Grande do Sul, BrazilAbstract -The objective of this work was to evaluate the physical fractions of soil organic matter (SOM) and the carbon management index (CMI) after different periods of soil tillage for sugarcane implantation. The study was carried out in a clayey Oxisol after 1, 3, and 5 years from soil tillage for crop plantation, with burning of the straw and manual cutting for harvest. As a reference, the soil of a native forest adjacent to the studied area was used. Soil samples were collected at the 0.00-0.05, 0.05-0.10, and 0.10-0.20-m soil layers, in order to quantify the CMI, as well as total organic C, particulated C, C associated with minerals, and C in the free light, occluded light, and heavy fractions of SOM. Soil tillage associated with previous burning of straw reduced the input of fresh organic matter to the soil and accelerated the decomposition of the SOM labile compartment, negatively affecting the stocks of soil physical fractions. The highest C proportions were observed in the fraction associated with minerals. The SOM density fractions were more sensible to detect changes in the stocks, lability, and the CMI, in the different crop implantation times. The cultivated areas had CMI lower than 100, which indicates the negative impacts of cropping on the stocks of organic matter and on soil physical quality.Index terms: Saccharum officinarum, physical fractiona...

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Estoques de carbono e qualidade da matéria orgânica do solo em áreas cultivadas com cana-de-açúcar

Cited by 30 publications

References 22 publications

Soil organic matter fractions and carbon management index under integrated crop-livestock system

Soil organic matter fractions and carbon management index under integrated crop-livestock system

Carbon Stocks and Soil Organic Matter Quality Under Different of Land Uses in the Maranhense Amazon

Frações físicas da matéria orgânica em Latossolo cultivado com cana-de-açúcar no Rio Grande do Sul

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