The use of models to integrate information and understanding of soil C at the regional scale

Paustian, Keith; Levine, Elissa R.; Post, Wilfred M.; Рыжова, И. М.

doi:10.1016/s0016-7061(97)00043-8

Cited by 136 publications

(77 citation statements)

References 76 publications

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“…The results are consistent with the observations of previous research (Mikhailova et al, 2000;Puget and Lal, 2005) in which croplands generally held the lowest SOC and TN amounts in comparison with forests and grasslands. Moreover, the results suggest that the extent of land use made an important impact on the distribution of SOC and TN contents in different land uses in the area, that is, both SOC and TN contents decreased with the increasing intensity of land use and management practices on the whole, which supports the findings of Paustian et al (1997) and Zeidler et al (2002). They found that SOC amount or soil nutrients decreased with increasing soil physical disturbance or land intensification.…”

Section: Soc and Tn Contents Affected By Land Use And Soil Depthsupporting

confidence: 75%

“…SOC and TN, often tightly coupled, are controlled by a number of natural and anthropogenic factors, including climate, vegetation, topography, parent material, intrinsic soil properties, land use and management practices, etc. (Homann et al, 1995;Paustian et al, 1997). A better understanding of SOC and TN contents and their relationships with these controlling factors is critical to evaluate current regional, continental and global soil C and N pools as well as potentials for C sequestration and N conservation to offset anthropogenic greenhouse gas emissions.…”

Section: Introductionmentioning

confidence: 99%

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Effects of land use, climate, topography and soil properties on regional soil organic carbon and total nitrogen in the Upstream Watershed of Miyun Reservoir, North China

Wang¹,

Wang²,

Ouyang³

2012

Journal of Environmental Sciences

119

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Soil organic carbon (SOC) and total nitrogen (TN) contents as well as their relationships with site characteristics are of profound importance in assessing current regional, continental and global soil C and N stocks and potentials for C sequestration and N conservation to offset anthropogenic emissions of greenhouse gases. This study investigated contents and distribution of SOC and TN under different land uses, and the quantitative relationships between SOC or TN and site characteristics in the Upstream Watershed of Miyun Reservoir, North China. Overall, both SOC and TN contents in natural secondary forests and grasslands were much higher than in plantations and croplands. Land use alone explained 37.2% and 38.4% of variations in SOC and TN contents, respectively. The optimal models for SOC and TN, achieved by multiple regression analysis combined with principal component analysis (PCA) to remove the multicollinearity among site variables, showed that elevation, slope, soil clay and water contents were the most significant factors controlling SOC and TN contents, jointly explaining 70.3% of SOC and 67.1% of TN contents variability. Only does additional 1.9% and 3% increase in the interpretations of SOC and TN contents variability respectively when land use was added to regressions, probably due to environment factors determine land use. Therefore, environmental variables were more important for SOC and TN variability than land use in the study area, and should be taken into consideration in properly evaluating effects of future land use changes on SOC and TN on a regional scale.

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Section: Soc and Tn Contents Affected By Land Use And Soil Depthsupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Effects of land use, climate, topography and soil properties on regional soil organic carbon and total nitrogen in the Upstream Watershed of Miyun Reservoir, North China

Wang¹,

Wang²,

Ouyang³

2012

Journal of Environmental Sciences

119

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“…), v.64, n.1, p.83-99, January/February 2007 The Century Ecosystem Model -Century is a model of soil organic matter and nutrient dynamics that emphasizes the decomposition of soil organic matter and the flux of C and N within and between different components (Parton et al, 1987). The grassland/crop and forest systems have different plant production submodels that are linked to a common soil organic matter and nutrient cycling submodel, which has been fully described before (Metherell et al, 1993;Paustian et al, 1997).…”

Section: Impact Of Climate Change On Soil Organic Matter Status In Camentioning

confidence: 99%

Tropical agriculture and global warming: impacts and mitigation options

Cerri

Sparovek

Bernoux³

et al. 2007

Sci. agric. (Piracicaba, Braz.)

193

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The intensive land use invariably has several negative effects on the environment and crop production if conservative practices are not adopted. Reduction in soil organic matter (SOM) quantity means gas emission (mainly CO 2 , CH 4 , N 2 O) to the atmosphere and increased global warming. Soil sustainability is also affected, since remaining SOM quality changes. Alterations can be verified, for example, by soil desegregation and changes in structure. The consequences are erosion, reduction in nutrient availability for the plants and lower water retention capacity. These and other factors reflect negatively on crop productivity and sustainability of the soil-plant-atmosphere system. Conversely, adoption of "best management practices", such as conservation tillage, can partly reverse the process -they are aimed at increasing the input of organic matter to the soil and/or decreasing the rates at which soil organic matter decomposes. Key words: Brazil, climate change, greenhouse effect, soil organic matter, management practices AGRICULTURA TROPICAL E AQUECIMENTO GLOBAL: IMPACTOS E OPÇÕES DE MITIGAÇÃORESUMO: O uso intensivo da terra invariavelmente causa efeitos negativos ao ambiente e produção agrícola se práticas conservativas não forem adotadas. Redução na quantidade de matéria orgânica do solo significa emissão de gases (principalmente CO 2 , CH 4 , N 2 O) para a atmosfera e aumento do aquecimento global. A sustentabilidade do solo é também afetada, uma vez que a qualidade da matéria orgânica remanescente muda. Alterações podem ser verificadas, por exemplo, pela desagregação do solo e mudança na sua estrutura. As consequências são erosão, redução na disponibilidade de nutrientes para as plantas e baixa capacidade de retenção de água no solo. Estes e outros fatores refletem negativamente na produtivade das culturas e sustentabilidade do sistema solo-planta-atmosfera. Ao contrário, a adoção de boas práticas de manejo, tal como o sistema plantio direto, pode parcialmente reverter o processo, uma vez que objetiva o aumento das entradas de material orgânico no solo e/ou diminuição das taxas de decomposição da matéria orgânica do solo. Palavras-chave: Brasil, mudanças climáticas, efeito estufa, matéria orgânica do solo, boas práticas de manejo

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“…Obviously, the different conditions and management practices that affect SOC dynamics were not fully represented by the fourteen long-term experiments used in our study. More realistic approaches like the use of dynamic simulation systems linked to geographic information systems (GIS) would allow better assessments of SOC stocks at a regional or national level (Paustian et al, 1997b;Fallon et al, 2002). However, despite the limitations, our study has provided a feasible first estimation for the potential of tillage reduction in agricultural soils of Mediterranean Spain to mitigate GHG emissions.…”

mentioning

confidence: 99%

Short communication. Potential to mitigate anthropogenic CO2 emissions by tillage reduction in dryland soils of Spain

Álvaro‐Fuentes

Cantero‐Martínez

2010

Span. j. agric. res.

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Spain is one of the countries with the highest greenhouse gas (GHG) emissions within the EU-27. Consequently, mitigation strategies need to be reported and quantified to accomplish the goals and requirements of the Kyoto Protocol. In this study, a first estimation of the carbon (C) mitigation potential of tillage reduction in Mediterranean rainfed Spain is presented. Results from eight studies carried out in Spain under rainfed agriculture to investigate the effects of no-tillage (NT) and reduced tillage (RT) compared with conventional tillage (CT) on soil organic carbon (SOC) were used. For current land surface under conservation tillage, NT and RT are sequestering 0.14 and 0.08 Tg C yr -1 , respectively. Those rates represent 1.1% and 0.6% of the total CO 2 emissions generated from agricultural activities in Spain during 2006. Alternatively, in a hypothetical scenario where all the arable dryland was under either NT or RT management, SOC sequestration would be 2.18 and 0.72 Tg C yr -1 representing 17.4% and 5.8% of the total 2006 CO 2 equivalent emissions generated from the agricultural sector in Spain. This is a significant estimate that would help to achieve GHG emissions targets for the current commitment period of the Kyoto Protocol.Additional key words: conventional tillage; dryland Spain; greenhouse gas emissions; no-tillage; soil organic carbon sequestration. ResumenComunicación corta. Potencial de mitigación de emisiones de CO 2 de origen antropogénico mediante la reducción del laboreo en suelos de secano españoles Dentro de la Unión Europea, España es uno de los países con mayores emisiones de gases de efecto invernadero (GEI). Por tanto, es urgente establecer medidas de mitigación con el fin de alcanzar los objetivos del Protocolo de Kyoto. En este estudio se presenta una primera estimación del potencial de mitigación de carbono (C) a través de la reducción del laboreo en suelos de secano en zonas mediterráneas españolas. Se utilizaron los resultados de ocho estudios llevados a cabo en España en condiciones de secano sobre la influencia del no-laboreo (NL) y del laboreo reducido (LR) frente al laboreo convencional (LC), en el carbono orgánico del suelo (COS). Para la superficie actual bajo laboreo de conservación, NL y LR están secuestrando 0,14 y 0,08 Tg C año -1 , respectivamente. Estas tasas representan el 1,1% y el 0,6%, respectivamente, del total de CO 2 equivalente generado por la actividad agrícola en España durante 2006. Alternativamente, en un hipotético escenario en el que toda la superficie de secano disponible estuviera bajo NL o LR, el secuestro de COS sería 2,18 y 0,72 Tg C año -1 , respectivamente, lo que representa el 17,4% y el 5,8% del total de CO 2 equivalente generado por la actividad agrícola en España durante 2006. Estas estimaciones confirman la idoneidad de la reducción del laboreo para cumplir el objetivo de recortar las emisiones de GEI durante el periodo actual del Protocolo de Kyoto.Palabras clave adicionales: emisiones de gases de efecto

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The use of models to integrate information and understanding of soil C at the regional scale

Cited by 136 publications

References 76 publications

Effects of land use, climate, topography and soil properties on regional soil organic carbon and total nitrogen in the Upstream Watershed of Miyun Reservoir, North China

Effects of land use, climate, topography and soil properties on regional soil organic carbon and total nitrogen in the Upstream Watershed of Miyun Reservoir, North China

Tropical agriculture and global warming: impacts and mitigation options

Short communication. Potential to mitigate anthropogenic CO2 emissions by tillage reduction in dryland soils of Spain

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