Changes in humic substances along an age sequence of Norway spruce stands planted on former agricultural land

Cerli, Chiara; Celi, Luisella; Kaiser, Klaus; Guggenberger, Georg; Johansson, Maj‐Britt; Cignetti, Alessandro; Zanini, Ermanno

doi:10.1016/j.orggeochem.2008.06.001

Cited by 56 publications

(43 citation statements)

References 62 publications

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“…Thirdly, lignin-derived aromatics might be altered in a way that they escape the "analytical window" and cannot be ascribed to a lignin source anymore. For instance, the CuO method yields a number of aromatic monomers of unknown origin besides the ligninderived monomers (Cerli et al, 2008). These compounds are typically not quantified and are thus not considered in estimates of the SOM composition.…”

Section: Analytical Limitationsmentioning

confidence: 99%

Gone or just out of sight? The apparent disappearance of aromatic litter components in soils

Klotzbücher

Kalbitz

Cerli

et al. 2016

SOIL

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Abstract. Uncertainties concerning stabilization of organic compounds in soil limit our basic understanding on soil organic matter (SOM) formation and our ability to model and manage effects of global change on SOM stocks. One controversially debated aspect is the contribution of aromatic litter components, such as lignin and tannins, to stable SOM forms. In the present opinion paper, we summarize and discuss the inconsistencies and propose research options to clear them.Lignin degradation takes place stepwise, starting with (i) depolymerization and followed by (ii) transformation of the water-soluble depolymerization products. The long-term fate of the depolymerization products and other soluble aromatics, e.g., tannins, in the mineral soils is still a mystery. Research on dissolved organic matter (DOM) composition and fluxes indicates dissolved aromatics are important precursors of stable SOM attached to mineral surfaces and persist in soils for centuries to millennia. Evidence comes from flux analyses in soil profiles, biodegradation assays, and sorption experiments. In contrast, studies on composition of mineral-associated SOM indicate the prevalence of non-aromatic microbial-derived compounds. Other studies suggest the turnover of lignin in soil can be faster than the turnover of bulk SOM. Mechanisms that can explain the apparent fast disappearance of lignin in mineral soils are, however, not yet identified.The contradictions might be explained by analytical problems. Commonly used methods probably detect only a fraction of the aromatics stored in the mineral soil. Careful data interpretation, critical assessment of analytical limitations, and combined studies on DOM and solid-phase SOM could thus be ways to unveil the issues.

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Section: Analytical Limitationsmentioning

confidence: 99%

Gone or just out of sight? The apparent disappearance of aromatic litter components in soils

Klotzbücher

Kalbitz

Cerli

et al. 2016

SOIL

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“…Ouimet et al (2007) reported the beginning of forest floor accumulation at a similar age. A certain trend of quanttative increase in the amount of surface humus (carbon) has been found in relation to increased age (Keersmaeker et al, 2004;Cerli et al, 2006Cerli et al, , 2008Niu and Duiker, 2006;Ouimet et al, 2007) for forest stand or in comparing both younger forest stands situated on formerly agricultural soil with old-growth forest on at least semi-natural sites (in terms of weight of dry mass: Podrázský and Remes, 2007, Podrázský and Procházka, 2009; as to thickness of forest floor, storage of carbon and nitrogen: Alriksson and Olsson, 1995;Thuille and Schulze, 2006;Oheimb et al, 2008;Ritter et al, 2003). Except for two comparative sites, we also found significant differences between 50-year-old afforestation and adjacent long-term forest in terms of their having different amounts of forest floor.…”

Section: Discussionmentioning

confidence: 99%

Former agriculture impacts on properties of Norway spruce forest

et al. 2011

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Forest floor is considered a major feature distinguishing forest from agricultural soils. Forest floor develops as forest stands grow and is composed of more or less altered plant-tissue biomass accumulated on the soil surface. Our study's aim was to find whether properties of both the organic layers and mineral soil differ according to the land-use history of the sites compared. Each site included an afforested area of immature 50-year-old spruce forest (AFF) on formerly agricultural land plus an adjacent area of old-growth 100-year-old spruce stand (FOR). The localities are situated at altitudes ranging between 600 and 850 metres above sea level. From the results of our study it can be concluded that both forest floor and mineral soil had higher pH and Ca concentration at formerly agricultural sites. C/N ratio is significantly lower in afforested soil. First-generation humus was significantly higher in phosphorus.Key words: afforestation; land use; legacy of agriculture; Picea abies (L.) Karst. ResumenImpactos en las propiedades del suelo de los bosques de pinabete en terrenos agrícolas abandonados El piso forestal es considerado una de las principales características distintivas de los suelos forestales frente a los agrícolas. El piso forestal se desarrolla según crecen las masas forestales y se compone de tejidos de vegetales de la biomasa más o menos alterados acumulados en la superficie del suelo. El objetivo de nuestro estudio fue determinar si las propiedades de las capas orgánicas y minerales del suelo difieren de acuerdo a la historia del uso del suelo de los sitios. Cada sitio incluye un área reforestada de bosque de pinabete inmaduro de 50 años de edad (AFF) en antiguo terreno agrícola, más un área adyacente madura de pinabete de 100 años de edad. Las localidades se encuentran en altitudes que oscilan entre 600 y 850 metros sobre el nivel del mar. De los resultados de nuestro estudio se puede concluir que tanto el suelo del bosque como el suelo mineral tenían un pH más alto y mayor concentración de Ca en los sitios agrícolas abandonados. La relación C/N es significativamente menor en los suelos reforestados. La primera generación de humus presentó un significativamente mayor contenido en fósforo.Palabras clave: reforestación; uso del suelo; Picea abies.

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“…(2007) in their examination of luvisols. Cerli et al (2008) reported that the increase of fulvic acids with afforestation on land formerly used for agriculture probably indicates podzolization. the highest pH levels of 5.00-5.72 were determined in the upper horizon (0-15cm) of the arable soil (Fig.…”

Section: Fig 1 Organic Carbon Content In the Humus Horizons Of The mentioning

confidence: 99%

Land use change impact on soil organic matter. Loess landscape case study

Sosnowska

2012

Miscellanea Geographica - Regional Studies on Development

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the aim of this article is to establish how land use change influences soil organic matter content in the loess landscape. the research was conducted near Krasnystaw in the lublin upland, in forest, on arable land and on abandoned lands at various stages of secondary succession. During the field research, samples were collected from the upper soil layer and analyzed for organic carbon content, fractional composition of humus compounds and soil reaction. the results obtained indicate that the impact of land use change manifests itself in a change of the soil reaction, which turns from neutral or slightly acid into acid. the tillage system reduces organic matter in the soil and increases the humic acids ratio, whereas abandonment of the land causes an evident increase in the soil's organic matter content and the fulvic acids ratio. these results allow us to state that land use change has a rapid impact on the geochemical properties of the landscape (which can be noticed as soon as 5 years after the land is abandoned).

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Changes in humic substances along an age sequence of Norway spruce stands planted on former agricultural land

Cited by 56 publications

References 62 publications

Gone or just out of sight? The apparent disappearance of aromatic litter components in soils

Gone or just out of sight? The apparent disappearance of aromatic litter components in soils

Former agriculture impacts on properties of Norway spruce forest

Land use change impact on soil organic matter. Loess landscape case study

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