Podzolisation and soil organic matter dynamics

Buurman, P.; Jongmans, A.G.

doi:10.1016/j.geoderma.2004.07.006

Cited by 200 publications

(117 citation statements)

References 43 publications

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“…It is generally accepted that podzolization consists of two key processes: (i) mobilization from the surface horizon and translocation of organic matter and Fe, Al, Si and (ii) immobilization and stabilization of organic matter and Fe, Al in the subsoil (e.g., Lundström et al, 2000;Buurman and Jongmans, 2005). Sauer et al (2007) discussed different hypotheses on the elementary mechanisms behind these two processes.…”

Section: Introductionmentioning

confidence: 99%

Can Fe isotope fractionations trace the pedogenetic mechanisms involved in podzolization?

et al. 2017

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a b s t r a c t a r t i c l e i n f oStable Fe isotopes have shown the potential for tracing pedogenetic processes. Large isotopic fractionations were especially observed in Podzols. Nevertheless, a clear link between isotopic fractionation and elementary processes still needs to be established. To spatially distinguish the mechanisms successively involved in pedogenesis, we studied a podzolic chronosequence from Vancouver Island (British Columbia, Canada). We analyzed depth variations in soil properties (pH, particle size fractions, organic carbon, Si/Al ratio, Zr, Ti), Fe concentrations in different Fe pools, and Fe isotopic compositions. The Si/Al ratio, Zr, and Ti demonstrated that the Cox Bay Podzols developed from the same parental material, satisfying the requirements of a chronosequence. We showed that acidification, to a pH of 4.7, was a prerequisite for the start of podzolization. This first phase took place after 270 years. Furthermore, we observed that once the required pH was reached (4.7), podzolization occurred rapidly over 50 years. We found that Fe isotope fractionation in the A/E horizon was linked to mineral dissolution, while in the podzolic B horizons this fractionation was clearly associated with the accumulation of Fe-organic complexes and poorly crystalline Fe oxyhydroxides.

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Section: Introductionmentioning

confidence: 99%

Can Fe isotope fractionations trace the pedogenetic mechanisms involved in podzolization?

et al. 2017

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“…Such organic matter accumulation in the Spodosols layer at the study site Palangkaraya, Central Kalimantan was caused by the dominant presence of native vegetation such as needlegrass, Kayu gronggang (Cratoxylum sp), Kayu kurun, Kayu tuwih (Diospyros sp), ferns, and other lesser plants whose decomposed organic remains have accumulated at the higher horizon, with mean rainfall of 2000-2300 mm year -1 thereby, bringing about active leaching. This phenomenon has come about because, like clay, organic matter also goes through movement from higher to lower horizons (Buurman & Jongmans, 2002). The C content of the lignite humic substance (37.3%) was accounted for by its origin which is young coal, or of incomplete coal development, that typically yields a soft and fragile substance, brownish color, with high humidity hence, yielding a much lower carbon content.…”

Section: Resultsmentioning

confidence: 99%

Characterization of Humic Substance Extracted from Andisols, Spodosols, Peat, and Lignite

Rahmi

Suwardi

Sumawinata

2018

Sains Tanah J. Soil Sci. Agroclimatology

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Soil and other materials with high C-organic content are potential natural sources of humic substances. Until now the differences in the characteristics of such humic substances that are extracted from different sources have not been widely studied. Thus, this study was aimed to characterize humic substances extracted from Andisols, Spodosols, Peat, and Lignite. The highest Corganic (48.8%) and N (7.6%) were obtained from Peat and Spodosols, respectively. The andisols humic substance produced the highest total acidity (6.52 cmol kg -1). The humic substance extracted from Spodosols was a mostly aliphatic group and phenolate -OH, while that of andisols and lignite contained more aromatic group and phenolate -OH, whereas the humic substance from peat was a predominantly aliphatic group and -COOH. The surface morphology of the humic substances observed using SEM showed varying densities and shapes due to differences in their respective degree of decomposition and the formation process involved. There has been significant interest in investigating the different characteristics of the humic substance. The type humic substances are important to be known considering their positive effects on soil fertility and plant growth and development.

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“…O processo em si se sobrepõe em grande parte ao encontrado para Podzois não boreais, por Sauer et al (2007) e definidos por Buurman & Jongmans (2005), envolvendo materiais de origem pobres, matéria orgânica recalcitrante e translocação de complexos Fehúmus e Al-húmus. O papel desempenhado pelos compostos inorgânicos amorfos, se presentes, é pouco significativo na translocação de metais, se comparado aos complexos envolvendo matéria orgânica.…”

Section: O Processo De Podzolizaçãounclassified

“…O processo de formação do horizonte B espódico, relativamente rico em óxidos de Fe e Al e, ou, carbono orgânico iluviais, podendo ser pobre em argila e endurecido, é bastante discutido na literatura, principalmente para Espodossolos do hemisfério norte, com revisões e artigos que discutem diferentes hipóteses sobre o processo de podzolização (De Coninck, 1980;Farmer, 1982;Lundström et al, 2000a;Buurman & Jongmans, 2005;Sauer et al, 2007). Para ambientes tropicais, a presença de material de origem essencialmente quartzoso e de impedimento subsuperficial (lençol freático elevado e, ou, horizonte cimentado) representa condição comum de ocorrência de horizonte espódico.…”

Section: Introductionunclassified

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Podzolização em solos de áreas de depressão de topo dos tabuleiros costeiros do Nordeste brasileiro

Silva

Gomes

Filho

et al. 2013

Rev. Bras. Ciênc. Solo

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Podzolisation and soil organic matter dynamics

Cited by 200 publications

References 43 publications

Can Fe isotope fractionations trace the pedogenetic mechanisms involved in podzolization?

Can Fe isotope fractionations trace the pedogenetic mechanisms involved in podzolization?

Characterization of Humic Substance Extracted from Andisols, Spodosols, Peat, and Lignite

Podzolização em solos de áreas de depressão de topo dos tabuleiros costeiros do Nordeste brasileiro

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