The Depth Distribution of Soil Organic Carbon in Relation to Land Use and Management and the Potential of Carbon Sequestration in Subsoil Horizons

Lorenz, Klaus; Lal, Rattan

doi:10.1016/s0065-2113(05)88002-2

Cited by 495 publications

(310 citation statements)

References 152 publications

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“…According to Franzluebbers (2005), the SR of SOC in depth under Mediterranean climatic conditions potentially affect the carbon incorporation in soils as the residue accumulation in the subsurface horizon has an effect on carbon incorporation. Also, the decomposition rates in deeper horizons are lower than in the upper soil horizons (Lorenz and Lal, 2005).…”

Section: Stratification Ratio Of Soil Organic Carbonmentioning

confidence: 92%

“…Besides, Franzluebbers (2005) concludes that the topsoil is more vulnerable to changes in management practices, and the carbon sequestration occurs principally in the upper horizons. However, the surface horizon is not the layer with the higher SOC sequestration potential because SOC exists in stable forms in depth, which makes it highly recalcitrant to biodegradation processes (Lorenz and Lal, 2005). Nevertheless, CT promotes a fast SOM mineralisation in Mediterranean agricultural soils (Melero et al, 2009).…”

Section: Soil Organic Carbon Nitrogen and C : N Ratiomentioning

confidence: 99%

“…In Mediterranean areas, SOC can be stored in deep layers (below 30 cm deep). This is important in OF, as SOC can be transported to deeper soil horizons, contributing to the subsoil C storage (Lorenz and Lal, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Conventional tillage versus organic farming in relation to soil organic carbon stock in olive groves in Mediterranean rangelands (southern Spain)

Parras-Alcántara

Lozano‐García

2014

Solid Earth

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Abstract. Soil organic carbon (SOC) concentration is a soil variable subject to changes. The management system is a key factor that influences these changes. To determine the long-term effects of the management system on SOC stocks (SOCS) in olive groves, 114 soil profiles were studied in the Los Pedroches Valley (Mediterranean rangelands -southern Spain) for 20 years. The management practices were conventional tillage (CT) and organic farming (OF) in four soil types: Cambisols (CMs), Regosols (RGs), Luvisols (LVs) and Leptosols (LPs). Soil properties were statistically analysed by management techniques, soil types and horizons. Significant differences (p < 0.05) were found between soil types and management practices. It was equally observed that the management system affected SOCS. In addition, the total SOCS during the 20-year experiment increased in OF with respect to CT by 72 and 66 % in CMs and LVs respectively. SOC showed significant differences for horizons (p < 0.05) in relation to the management type. The stratification ratio (SR) was used as an indicator of soil quality based on the influence of surface SOC levels on erosion control, water infiltration and nutrient conservation with respect to deep layers. The SR of SOC from the surface to depth was greater in CT compared to OF with the exception of RGs. In all cases, the SR of SOC was > 2. These results indicate high soil quality and that management practices affect SOC storage in the Los Pedroches Valley.

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Section: Stratification Ratio Of Soil Organic Carbonmentioning

confidence: 92%

Section: Soil Organic Carbon Nitrogen and C : N Ratiomentioning

confidence: 99%

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Conventional tillage versus organic farming in relation to soil organic carbon stock in olive groves in Mediterranean rangelands (southern Spain)

Parras-Alcántara

Lozano‐García

2014

Solid Earth

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“…Previous research indicates that land use change has major impact on soil organic carbon storage (Franzluebbers et al1994;Riezebos and Loerts 1998;Lorenz and Lal 2005). In northwestern New Brunswick, near the BBW, Wang et al (1984) and Rees et al (2007Rees et al ( , 2008 found that intensive row cropping of potato (potato-grain rotations) often leads to high rates of soil erosion and reduction in SOC levels.…”

Section: Impacts Of Land Use Map On Soil Organic Carbonmentioning

confidence: 97%

Using artificial neural network models to produce soil organic carbon content distribution maps across landscapes

Zhao¹,

Yang²,

Benoy³

et al. 2010

Can. J. Soil. Sci.

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network models to produce soil organic carbon content distribution maps across landscapes. Can. J. Soil Sci. 90: 75Á87. Soil organic carbon (SOC) content is an important soil quality indicator that plays an important role in regulating physical, chemical and biological properties of soil. Field assessment of SOC is time consuming and expensive. It is difficult to obtain highresolution SOC distribution maps that are needed for landscape analysis of large areas. An artificial neural network (ANN) model was developed to predict SOC based on parameters derived from digital elevation model (DEM) together with soil properties extracted from widely available coarse resolution soil maps (1:1 000 000 scale). Field estimated SOC content data extracted from high-resolution soil maps (1:10 000 scale) in Black Brook Watershed in northwestern New Brunswick, Canada, were used to calibrate and validate the model. We found that vertical slope position (VSP) was the most important variable that determines distributions of SOC across the landscape. Other variables such as slope steepness, and potential solar radiation (PSR) also had significant influence on SOC distributions. The prediction of the selected two-input-node SOC model (VSP and coarse resolution soil map recorded SOC as inputs) had a correlation coefficient of 0.92 with measured values, and model predicted SOC values had 47.9% of the total points within 90.5% of the measured values and 70.6% within 91% of the measured values. The prediction of the selected four-input-node model (VSP, slope steepness, PSR and coarse resolution SOC values as inputs) had a correlation coefficient of 0.98 with measured values and model predicted SOC values had 75% of the total points within 90.5% of the measured values and 87% within 91% of the measured values. The prediction of the five-input-nodes model with soil drainage as additional input had a correlation coefficient of 0.99 with measured values, and model predicted SOC values had 87% of the total points within 90.5% of the measured values and 98% of the total points within 91% of the measured values. The calibrated SOC prediction model was used to produce a high-resolution SOC map for the Black Brook Watershed and the resulting SOC distribution map is considered to be realistic. Results indicated that DEM-derived hydrological parameters together with widely available coarse resolution soil map data could be used to produce high-resolution SOC maps with the ANN method. For personal use only.

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“…)/maize and lablab bean (Dolichos lablab L.)/maize, respectively, occurred below 0.175 m depth. The increase in C stocks in subsoil induced by cover crops could be an important strategy for C sequestration because the deep soil layers are less affected by disturbance under grain production (Lorenz & Lal, 2005).…”

Section: Carbon Stocks In Stratified Soil Layersmentioning

confidence: 99%

Carbon stock and its compartments in a subtropical oxisol under long-term tillage and crop rotation systems

Campos

Amado

Bayer

et al. 2011

Rev. Bras. Ciênc. Solo

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Soil organic matter (SOM) plays a crucial role in soil quality and can act as an atmospheric C-CO 2 sink under conservationist management systems. This study aimed to evaluate the long-term effects (19 years) of tillage (CT-conventional tillage and NT-no tillage) and crop rotations (R0-monoculture system, R1-winter crop rotation, and R2-intensive crop rotation) on total, particulate and mineralassociated organic carbon (C) stocks of an originally degraded Red Oxisol in Cruz Alta, RS, Southern Brazil. The climate is humid subtropical Cfa 2a (Köppen classification), the mean annual precipitation 1,774 mm and mean annual temperature 19.2 o C. The plots were divided into four segments, of which each was sampled in the layers 0-0.05, 0.05-0.10, 0.10-0.20, and 0.20-0.30 m. Sampling was performed manually by opening small trenches. The SOM pools were determined by physical fractionation. Soil C stocks had a linear relationship with annual crop C inputs, regardless of the tillage systems. Thus, soil disturbance had a minor effect on SOM turnover. In the 0-0.30 m layer, soil C sequestration ranged from 0 to 0.51 Mg ha -1 yr -1 , using the CT R0 treatment as base-line; crop rotation systems had more influence on soil stock C than tillage systems. The mean C sequestration rate of the cropping systems was 0.13 Mg ha -1 yr -1 higher in NT than CT. This result was associated to the higher C input by crops due to the improvement in soil quality under long-term no-tillage. The particulate C fraction Brazil. was a sensitive indicator of soil management quality, while mineral-associated organic C was the main pool of atmospheric C fixed in this clayey Oxisol. The C retention in this stable SOM fraction accounts for 81 and 89 % of total C sequestration in the treatments NT R1 and NT R2, respectively, in relation to the same cropping systems under CT. The highest C management index was observed in NT R2, confirming the capacity of this soil management practice to improve the soil C stock qualitatively in relation to CT R0. The results highlighted the diversification of crop rotation with cover crops as a crucial strategy for atmospheric C-CO 2 sequestration and SOM quality improvement in highly weathered subtropical Oxisols.Index terms: carbon sequestration, no-tillage, conventional tillage, soil management. 0-0,05, 0,05-0,10, 0,10-0,20 e 0,20-0,30 RESUMO: ESTOQUE E COMPARTIMENTOS DE CARBONO EM UM LATOSSOLO VERMELHO SUBTROPICAL SOB DIFERENTES SISTEMAS DE LONGO PRAZO DE PREPARO E ROTAÇÃO DE CULTURAS A matéria orgânica do solo (MOS) desempenha papel relevante na qualidade do solo e pode atuar como dreno de C-CO 2 atmosférico em solos sob sistemas de manejo conservacionista. Este estudo foi realizado com o objetivo de investigar o efeito de longo prazo (19 anos) de sistemas de preparo do solo (PC-preparo convencional e PD-plantio direto) e de rotação de culturas (R0-sucessão de monoculturas, R1-rotação de culturas de inverno e R2-rotação intensiva de culturas) no estoque de carbono (C) orgânico total, particulado e associad...

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The Depth Distribution of Soil Organic Carbon in Relation to Land Use and Management and the Potential of Carbon Sequestration in Subsoil Horizons

Cited by 495 publications

References 152 publications

Conventional tillage versus organic farming in relation to soil organic carbon stock in olive groves in Mediterranean rangelands (southern Spain)

Conventional tillage versus organic farming in relation to soil organic carbon stock in olive groves in Mediterranean rangelands (southern Spain)

Using artificial neural network models to produce soil organic carbon content distribution maps across landscapes

Carbon stock and its compartments in a subtropical oxisol under long-term tillage and crop rotation systems

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