Soil aggregation and soil organic matter in conventionally and organically farmed Austrian Chernozems

Taru Sandén, Georg J. Lair, Jeroen P. Van Leeuwen, Guorún Gísladóttir, Jaap Bloem, Kristín Vala Ragnarsdóttir, Markus Steffens, Winfried E.H. Blum

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

In order to study the soil aggregate distributions and soil organic matter (SOM), we sampled top- and subsoils in four intensively farmed croplands (two organic (Org-OB and Org-LA), and two conventional (Con-OB and Con-LA)) on Haplic Chernozems located in Marchfeld in the east of Vienna (Austria). Soil structure and SOM quantity, quality and distribution between free and occluded particulate organic matter and aggregate size fractions (<20 μm, 20-250 μm, 250-5000 μm) were studied by following a density fractionation procedure with low-energy ultrasound treatment. Te relation of the soil physicochemical (e.g., particle size distribution, pH, organic carbon, total nitrogen) and biological properties (e.g., fungal biomass, active fungi) with stable soil aggregate size fractions and SOM was studied. Te mean weight diameter (MWD) showed no significant difference between all studied sites and was between 3.8 mm and 10.0 mm in topsoils and between 6.7 mm and 11.9 mm in subsoils. In topsoils, the contents of calcium-acetate-lactate (CAL)-extractable P, active fungal biomass, dithionite-extractable Fe and sand were significantly positively correlated with the amount of the macroaggregates and with the MWD. We observed that most soil organic carbon, depending on soil texture, was stored in the microaggregate size classes <20 μm and 20-250 μm.
LanguageEnglish
Pages41-55
JournalBodenkultur
Volume68
Issue number1
DOIs
Publication statusPublished - 2017

Fingerprint

soil aggregation
soil aggregates
soil organic matter
aggregate size
soil aggregate
subsoil
Austria
topsoil
microaggregates
microaggregate
macroaggregate
soil
biomass
particle size distribution
particulate organic matter
soil texture
soil structure
soil organic carbon
total organic carbon
lactates

Keywords

  • Aggregate hierarchy
  • Aggregate stability
  • Organic matter dynamics
  • Particulate organic matter (POM)
  • Solid-state 13C NMR spectroscopy

Cite this

Sandén, T., Lair, G. J., Van Leeuwen, J. P., Gísladóttir, G., Bloem, J., Ragnarsdóttir, K. V., ... Blum, W. E. H. (2017). Soil aggregation and soil organic matter in conventionally and organically farmed Austrian Chernozems. Bodenkultur, 68(1), 41-55. https://doi.org/10.1515/boku-2017-0004
Sandén, Taru ; Lair, Georg J. ; Van Leeuwen, Jeroen P. ; Gísladóttir, Guorún ; Bloem, Jaap ; Ragnarsdóttir, Kristín Vala ; Steffens, Markus ; Blum, Winfried E.H. / Soil aggregation and soil organic matter in conventionally and organically farmed Austrian Chernozems. In: Bodenkultur. 2017 ; Vol. 68, No. 1. pp. 41-55.
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abstract = "In order to study the soil aggregate distributions and soil organic matter (SOM), we sampled top- and subsoils in four intensively farmed croplands (two organic (Org-OB and Org-LA), and two conventional (Con-OB and Con-LA)) on Haplic Chernozems located in Marchfeld in the east of Vienna (Austria). Soil structure and SOM quantity, quality and distribution between free and occluded particulate organic matter and aggregate size fractions (<20 μm, 20-250 μm, 250-5000 μm) were studied by following a density fractionation procedure with low-energy ultrasound treatment. Te relation of the soil physicochemical (e.g., particle size distribution, pH, organic carbon, total nitrogen) and biological properties (e.g., fungal biomass, active fungi) with stable soil aggregate size fractions and SOM was studied. Te mean weight diameter (MWD) showed no significant difference between all studied sites and was between 3.8 mm and 10.0 mm in topsoils and between 6.7 mm and 11.9 mm in subsoils. In topsoils, the contents of calcium-acetate-lactate (CAL)-extractable P, active fungal biomass, dithionite-extractable Fe and sand were significantly positively correlated with the amount of the macroaggregates and with the MWD. We observed that most soil organic carbon, depending on soil texture, was stored in the microaggregate size classes <20 μm and 20-250 μm.",
keywords = "Aggregate hierarchy, Aggregate stability, Organic matter dynamics, Particulate organic matter (POM), Solid-state 13C NMR spectroscopy",
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Sandén, T, Lair, GJ, Van Leeuwen, JP, Gísladóttir, G, Bloem, J, Ragnarsdóttir, KV, Steffens, M & Blum, WEH 2017, 'Soil aggregation and soil organic matter in conventionally and organically farmed Austrian Chernozems', Bodenkultur, vol. 68, no. 1, pp. 41-55. https://doi.org/10.1515/boku-2017-0004

Soil aggregation and soil organic matter in conventionally and organically farmed Austrian Chernozems. / Sandén, Taru; Lair, Georg J.; Van Leeuwen, Jeroen P.; Gísladóttir, Guorún; Bloem, Jaap; Ragnarsdóttir, Kristín Vala; Steffens, Markus; Blum, Winfried E.H.

In: Bodenkultur, Vol. 68, No. 1, 2017, p. 41-55.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Soil aggregation and soil organic matter in conventionally and organically farmed Austrian Chernozems

AU - Sandén, Taru

AU - Lair, Georg J.

AU - Van Leeuwen, Jeroen P.

AU - Gísladóttir, Guorún

AU - Bloem, Jaap

AU - Ragnarsdóttir, Kristín Vala

AU - Steffens, Markus

AU - Blum, Winfried E.H.

PY - 2017

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AB - In order to study the soil aggregate distributions and soil organic matter (SOM), we sampled top- and subsoils in four intensively farmed croplands (two organic (Org-OB and Org-LA), and two conventional (Con-OB and Con-LA)) on Haplic Chernozems located in Marchfeld in the east of Vienna (Austria). Soil structure and SOM quantity, quality and distribution between free and occluded particulate organic matter and aggregate size fractions (<20 μm, 20-250 μm, 250-5000 μm) were studied by following a density fractionation procedure with low-energy ultrasound treatment. Te relation of the soil physicochemical (e.g., particle size distribution, pH, organic carbon, total nitrogen) and biological properties (e.g., fungal biomass, active fungi) with stable soil aggregate size fractions and SOM was studied. Te mean weight diameter (MWD) showed no significant difference between all studied sites and was between 3.8 mm and 10.0 mm in topsoils and between 6.7 mm and 11.9 mm in subsoils. In topsoils, the contents of calcium-acetate-lactate (CAL)-extractable P, active fungal biomass, dithionite-extractable Fe and sand were significantly positively correlated with the amount of the macroaggregates and with the MWD. We observed that most soil organic carbon, depending on soil texture, was stored in the microaggregate size classes <20 μm and 20-250 μm.

KW - Aggregate hierarchy

KW - Aggregate stability

KW - Organic matter dynamics

KW - Particulate organic matter (POM)

KW - Solid-state 13C NMR spectroscopy

U2 - 10.1515/boku-2017-0004

DO - 10.1515/boku-2017-0004

M3 - Article

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