Estimates of annual leaching losses of dissolved organic carbon from pastures on Allophanic Soils grazed by dairy cattle, Waikato, New Zealand

Sparling, G.P.; Chibnall, EJ; Pronger, Jack; Rutledge, Susanna; Wall, Aaron M.; Campbell, DI; Schipper, Louis A.

doi:10.1080/00288233.2015.1120222

Cited by 18 publications

(14 citation statements)

References 38 publications

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“…In subsoils, piezometer-based concentrations are much higher than for other sampling methods (p<0.001, Figure 3), as these samples are almost exclusively taken in Histosols, where DOC degradation is inhibited by high groundwater tables (Easthouse et al, 1992). Where Zsolnay (2003) and Buckingham et al (2008) found different concentrations between zero-tension and tension lysimeters (Sparling et al, 2016), we did not observe this in neither top-(p>0.1) or subsoil data (p>0.1). Thus, both methods are combined in the analysis (Litaor, 1988a;Schrumpf et al, 2006).…”

contrasting

confidence: 54%

Global database and model on dissolved carbon in soil solution

Langeveld

Bouwman

Hoek

et al. 2019

Preprint

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Abstract. Abstract. Dissolved carbon leaching in and from soils plays an important role in C transport along the terrestrial-aquatic continuum. However, a global overview and analysis of dissolved carbon in soil solutions, covering a wide range of vegetation types and climates, is lacking. We compiled a global database on annual average dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC) in soil solutions, including potential governing factors, with 762 entries from 351 different sites covering a range of climate zones, land cover types and soil classes. Using this database we develop regression models to calculate topsoil concentrations, and concentrations vs. depth in the subsoil at the global scale. For DIC, the lack of a proportional globally distributed cover inhibits analysis on a global scale. For DOC, annual average concentrations range from 1.7 to 88.3 (median&#8201;=&#8201;25.27)&#8201;mg&#8201;C/L for topsoils and from 0.42 to 372.1 (median&#8201;=&#8201;5.50)&#8201;mg&#8201;C/L for subsoils (excluding lab incubations). Highest topsoil values occur in forests of cooler, humid zones. In topsoils, multiple regression showed that precipitation is the most significant factor. Our global topsoil DOC model (R2&#8201;=&#8201;0.36) uses precipitation, soil class, climate zone and land cover type as model factors. Our global subsoil model describes DOC concentrations vs. depth for different USDA soil classes (overall R2&#8201;=&#8201;0.45). Highest subsoil concentrations are calculated for Histosols.

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contrasting

confidence: 54%

Global database and model on dissolved carbon in soil solution

Langeveld

Bouwman

Hoek

et al. 2019

Preprint

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“…Then, the process of DOM percolation from the soil surface transfers C and nutrients to deeper layers through soil solution (Fröberg et al, 2007). Thus, DOM can undergo sorption and be stored or transported to aquifers, moving from the terrestrial to the aquatic system (Sparling et al, 2016). Therefore, DOM leaching may be an important pathway of continuous soil C and nutrient losses (Kindler et al, 2011).…”

Section: Dom Output and Lossesmentioning

confidence: 99%

“…The DOM concentration in soil solution is highly variable and depends on site-specific soil, climate, and land management conditions (Sparling et al, 2016). Most studies on DOM have been performed in temperate soils, predominating shallow soils.…”

Section: Final Remarks and Perspectivesmentioning

confidence: 99%

“…Soil type and landscape slope, leaching, and runoff ( Figure 1) are also important processes associated to DOM losses in the soil (Veum et al, 2009). In welldrained soils, leached DOC can reach the water table and release nutrients and pollutants that can contaminate groundwater (Thayalakumaran et al, 2015;Sparling et al, 2016), whereas runoff transports DOM and xenobiotics to other areas, rivers, and lakes.…”

Section: Introductionmentioning

confidence: 99%

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Processes that influence dissolved organic matter in the soil: a review

Gmach

Cherubin

Kaiser

et al. 2020

Sci. agric. (Piracicaba, Braz.)

171

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In tropical regions, climate conditions favor fast decomposition of soil organic matter (SOM), releasing into the soil organic composts in solid, liquid, and gaseous forms with variable compositions. Dissolved organic matter (DOM), a complex mixture of thousands of organic compounds, is only a small fraction of the decomposition products; however, it is highly mobile and reactive to the soil. Therefore, DOM play a key role in soil aggregation (formation of organometallic complexes), energy source for microorganisms, as well as C storage, cycling, and provision of plant-available nutrients. DOM multifunctionality to sustain soil functions and important ecosystem services have raised global scientific interest in studies on DOM fractions. However, previous studies were conducted predominantly under temperate soil conditions in natural ecosystems. Therefore, there is paucity of information on tropical soil conditions under agricultural systems, where DOM turnover is intensified by management practices. This review synthesized information in the literature to identify and discuss the main sources, transformations, and future of DOM in soils. We also discussed the importance of this fraction in C cycling and other soil properties and processes, emphasizing agricultural systems in tropical soils. Gaps and opportunities were identified to guide future studies on DOM in tropical soils.

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“…A disponibilidade para biodegradação é maior nas menores partículas, já que a associação das maiores às partículas minerais do solo pode oferecer certa resistência à atividade microbiana (resistência à dessorção para a biodegradação). Esta abertura de filtragem é indicada pela agência de proteção ambiental estadunidense (EPA -Environmental Protection Agency) e parece ser a mais utilizada em trabalhos recentes (Nosrati et al, 2012;Chaplot E Ribolzi, 2014;Figueiredo et al, 2014;Jiang, 2014;Menjistu et al, 2014;Singh et al, 2014;Zhou et al, 2015;Lombardo et al, 2016;Leinemann et al, 2016;Vera et al, 2016;Sparling et al, 2016;Miranda, 2017;Favorito et al, 2018;entre outros). A EPA indica a utilização de membrana de polietersulfona (PES) para o processo de filtração, baseada no estudo comparativo entre membranas de diferentes materiais em relação à contaminação e à adsorção (à membrana) de COD, realizado por Karanfil et al (2003).…”

Section: O Carbono Orgânico Dissolvidounclassified

Dinâmica de Carbono Orgânico Dissolvido em Ecossistemas Florestais: Uma Revisão Sobre a Lixiviação pela Chuva (Dissolved Organic Carbon Dynamics in Forest Ecosystems Through Rainfall Mediated Leaching: A Review )

Miranda

Avelar

2019

Rev. Bras. Geog. Fis.

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O fluxo de matéria orgânica é um componente importante da dinâmica de ecossistemas e dos impactos ambientais. A água da chuva, ao percolar os ambientes terrestres, transporta partículas orgânicas das quais as menores têm maior mobilidade espacial e são mais ativas do ponto de vista ecológico, sendo chamadas de dissolvidas quando menores que 0,45 µm na maioria dos estudos recentes. A dinâmica de carbono orgânico dissolvido (COD) inclui entradas atmosféricas de moléculas alóctones, tanto pela deposição úmida vinculada à chegada direta via chuva e que pode ser observada pela concentração de COD na precipitação inicial, quanto pela deposição seca originada pela lavagem da biomassa viva onde se acumulam poeiras orgânicas de origem atmosférica, a qual pode ser observada na precipitação atravessada. Nesta segunda, também há a presença de COD originado por exsudatos solúveis secretados pela própria vegetação. Nas deposições úmida e seca, é mais relevante a condição atmosférica vinculada à influência de atividades industriais e centros urbanos, do que a produtividade dos ecossistemas em si. Ao percolar e lixiviar os estoques de serrapilheira a água da chuva atinge as maiores concentrações de COD, onde a dinâmica de produtividade e decomposição de cada ecossistema torna-se preponderante. Quando infiltra o horizonte mineral do solo o COD pode adsorver-se às partículas minerais, reduzindo sua concentração na solução do solo gradativamente com o aumento da profundidade. Quando ocorrem escoamentos superficiais, ficam reduzidas as oportunidades de adsorção do COD ao solo, resultando em aumento das transferências dos ecossistemas terrestres para os aquáticos. A B S T R A C TThe flows of organic matter are an important part of the ecosystem dynamics and environmental impacts. Rainwater, when percolating through terrestrial environments, transports organic particles, of which the smallest ones have greater spatial mobility and are more ecologically active. These particles are considered dissolved when smaller than 0.45 μm in most recent studies. The dynamics of dissolved organic carbon (DOC) involves the atmospheric input of allochthonous molecules, due to the wet deposition associated with rainfall, which can be observed in the DOC concentration in the initial precipitation, as well as by the dry deposition caused by the washing of living biomass where organic dust of atmospheric origin accumulates, which can be observed in the throughfall fluxes. In the later, there is also the presence of DOC originated by soluble exudates secreted by the vegetation itself. About wet and dry depositions, the atmospheric condition associated with the influence of industrial activities and urban centers is more relevant than the productivity of the ecosystems themselves. When percolating and leaching the litter stocks, rainwater reaches the highest concentrations of DOC, where the dynamics of productivity and decomposition of each ecosystem becomes preponderant. When it infiltrates the soil mineral horizon the DOC can adsorb to the mineral particles, reducing its concentration in the soil solution gradually as the depth increases. With the occurrence of surface runoff, opportunities for adsorption of DOC to the soil are reduced, resulting in increased transfer from terrestrial to aquatic ecosystems.Key-words: Dissolved organic carbon; forest leaching; geoecology

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Estimates of annual leaching losses of dissolved organic carbon from pastures on Allophanic Soils grazed by dairy cattle, Waikato, New Zealand

Cited by 18 publications

References 38 publications

Global database and model on dissolved carbon in soil solution

Global database and model on dissolved carbon in soil solution

Processes that influence dissolved organic matter in the soil: a review

Dinâmica de Carbono Orgânico Dissolvido em Ecossistemas Florestais: Uma Revisão Sobre a Lixiviação pela Chuva (Dissolved Organic Carbon Dynamics in Forest Ecosystems Through Rainfall Mediated Leaching: A Review )

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