Mid-infrared spectroscopy for topsoil layer identification according to litter type and decompositional stage demonstrated on a large sample set of Austrian forest soils

Tatzber, Michael; Mutsch, Franz; Mentler, Axel; Leitgeb, Ernst; Englisch, Michael; Zehetner, Franz; Djukic, Ika; Gerzabek, Martin H.

doi:10.1016/j.geoderma.2011.07.025

Cited by 13 publications

(9 citation statements)

References 28 publications

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“…The resulting powder was compressed immediately to a transparent pellet and measured in transmission mode in the mid‐infrared area from 400 to 4000 cm −1 with a Bruker Optics Tensor 27 spectrometer (Bruker Austria GmbH, Wien, Austria). Characteristic spectral bands were selected following a review of all the spectra recorded and compared with known signal ranges from organic soil layers (Tatzber et al ., ) and humic acids (Tatzber et al ., ). ‘Band’ in this context means a region between two basepoints on the x‐axis that is unique for one or more specific functional group(s).…”

Section: Methodsmentioning

confidence: 99%

“…The signal for phenols suggests the presence of root exudates because phenols are important compounds in the exudate matrix (Qiao et al, 2014). In general, a stronger phenolic signal occurred in the 1293-1265 cm −1 region (Tatzber et al, 2011) of the residual fraction in treatments with seedlings, where they represent a relatively stable C pool (Min et al, 2015).…”

Section: The Ftir Analysismentioning

confidence: 99%

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The effect of roots and easily available carbon on the decomposition of soil organic matter fractions in boreal forest soil

Pumpanen

Lindén

Bruckman

et al. 2017

European J Soil Science

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The priming effect induced by carbon (C) that is easily available to microbes has been shown to increase the mineralization of soil organic matter (SOM) that is resistant to decomposition, but the combined effects of easily available carbon and the living root system have rarely been studied. The aim of this research was to study the decomposition of SOM fractions of different solubility in water and their 13C, 14C and 15N abundance with and without the presence of a living root system and easily available carbohydrate in the form of glucose. The SOM collected from the organic horizon of a boreal forest soil in Hyytiälä, southern Finland (61°51′N, 24°17′E), and exposed to laboratory incubations with and without the presence of Pinus sylvestris L. seedlings and glucose, was separated into three chemical fractions with accelerated solvent (ASE) and pressurized hot water extractions (PHWE). Changes in the natural abundance of 13C, 14C and 15N, spectral properties assessed by Fourier transform infrared spectroscopy (FTIR) and the C and N pools of SOM fractions were studied after incubation for 6 months. The extractions separated SOM into fractions with distinctive isotopic composition. The most easily soluble SOM fraction showed the largest abundance of 15N and 14C, and the living root system induced changes in the abundance of 15N and FTIR spectra. Our research suggests that plant roots may induce SOM degradation and N uptake from soluble SOM fractions, but 13C, 14C, 15N or FTIR alone cannot be used to describe the recalcitrance of SOM and its accessibility to microorganisms. It is better to use several methods in parallel to study the decomposability of SOM. Highlights We studied the effects of tree roots and addition of glucose on the solubility of soil organic matter (SOM). SOM can be separated into pools with distinctive isotopic concentrations with pressurized hot water. Roots may induce organic matter degradation and N uptake from soluble SOM fractions. Larger 14C abundance in soluble SOM indicated it contained older C than the recently assimilated C.

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Section: Methodsmentioning

confidence: 99%

Section: The Ftir Analysismentioning

confidence: 99%

The effect of roots and easily available carbon on the decomposition of soil organic matter fractions in boreal forest soil

Pumpanen

Lindén

Bruckman

et al. 2017

European J Soil Science

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“…To determine relative amounts of hydrophobic and hydrophylic functional groups of SOM, we used transmission FT-IR spectroscopy (Ellerbrock et al, 2005). Sample preparation for FT-IR analysis was adopted from Tatzber et al (2011). We used a steel grinding capsule in a S10 vibrating mill (PerkinElmer Inc.) to produce powdered and homogenized sample material.…”

Section: Soil Sampling and Som Characterizationmentioning

confidence: 99%

Soil Water Repellency and its Impact on Hydraulic Characteristics in a Beech Forest under Simulated Climate Change

Schwen

Zimmermann

Leitner

et al. 2015

Vadose Zone Journal

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Core Ideas Rainfall redistribution increased soil water repellency in a beech forest soil Soil water repellency correlated with organic matter composition and C/N ratio Contact angles correlated with air‐entry value of hydraulic soil characteristics Climate change is expected to result in prolonged dry periods and an increased occurrence of extreme rainfall events that can increase soil water repellency (SWR). However, this relationship has not been studied under field conditions yet. Also, for the development of hydrological models accounting for SWR, dependencies between SWR and soil hydraulic characteristics would be required. Our hypotheses were that (i) prolonged dry periods increase SWR by changing the composition of the soil organic matter (SOM) and that (ii) SWR alters hydraulic soil properties by the air‐entry value. The objective of the study was to assess the impact of different rainfall redistributions on the degree of SWR, physicochemical soil characteristics, and soil hydraulic properties. A field experiment was conducted on a Podsolic Cambisol in a beech forest with plots covered by roofs and irrigated artificially. Two rainfall redistribution treatments (moderate and extreme) and control plots were compared after two vegetation periods. Potential SWR was characterized by the soil–water contact angle, while the actual degree of SWR was derived indirectly from infiltration experiments with water and ethanol. We found an increase in SWR due to rainfall redistribution. Contact angles correlated positively with the contents of organic carbon (OC) and nitrogen and the relative amount of hydrophobic groups in the organic matter and negatively with the C/N ratio. Differences between intrinsic and actual hydraulic properties increased with prolonged dry periods. Contact angles correlated with the air‐entry value (inverse of van Genuchten parameter α). This finding offers a way to account for SWR in hydraulic models.

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“…: alifático, amídico, aromático e carboxílico) que podem fornecer informações importantes sobre a MO. [13][14][15] Portanto, a espectroscopia no infravermelho é um método amplamente utilizado para elucidar a estrutura molecular da matéria orgânica em sedimentos costeiros. 2,10,11,16 A Baía de Sepetiba (BS) (23º 00' 03" S e 43º 47' 57"O) é um corpo d'água semifechado com 447 km 2 , profundidade média de 6,0 m e com maré variando até 2,0 m. 17 A bacia hidrográfica (2000 km 2 ) é responsável pelo lançamento de aproximadamente 14 milhões de m 3 dia -1 de água doce na baía principalmente através do canal de São Francisco e rios da Guarda, Guandu e Cação.…”

Section: Introductionunclassified

Análise Espectroscópica Da Matéria Orgânica No Sedimento Superficial Da Baía De Sepetiba, Rio De Janeiro, Brasil

et al. 2020

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Spectroscopic techniques are powerful tools for molecular organic matter assessment in sediments, which analysis request low sample mass and are cheap, fast and easy to obtain. The aim of this work was to evaluate the elemental (C, N) and molecular composition of the organic matter in relation to the grain-size distribution over surface sediments from Sepetiba Bay. Spatial distribution of grain-size was remarkable heterogeneous, with the internal area presenting the highest levels of fine sediments, organic carbon (0.20-3.45%) and total nitrogen (

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Mid-infrared spectroscopy for topsoil layer identification according to litter type and decompositional stage demonstrated on a large sample set of Austrian forest soils

Cited by 13 publications

References 28 publications

The effect of roots and easily available carbon on the decomposition of soil organic matter fractions in boreal forest soil

The effect of roots and easily available carbon on the decomposition of soil organic matter fractions in boreal forest soil

Soil Water Repellency and its Impact on Hydraulic Characteristics in a Beech Forest under Simulated Climate Change

Análise Espectroscópica Da Matéria Orgânica No Sedimento Superficial Da Baía De Sepetiba, Rio De Janeiro, Brasil

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