COMPARISON OF <sup>13</sup>C CPMAS NMR AND CHEMICAL TECHNIQUES FOR MEASURING THE DEGREE OF DECOMPOSITION IN VIRGIN AND CULTIVATED PEAT PROFILES

Preston, Caroline M.; Shipitalo, S.-E.; Dudley, Robert L.; Fyfe, C. A.; Mathur, Shivani; Lévesque, M.

doi:10.4141/cjss87-016

Cited by 94 publications

(56 citation statements)

References 5 publications

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“…The Urrbrae Alfisol contained more alkyl carbon and less O-alkyl and aromatic carbon than the Meadows Alfisol. The changes observed between the two Alfisols were similar to those induced by cultivating a Histosol for 15 years (Preston et al 1987). Since cultivation has been demonstrated to promote the decomposition of soil organic materials, the changes were presumed to indicate that the organic materials contained in the Urrbrae Alfisol were decomposed to a greater extent than that contained in the Meadows Alfisol.…”

Section: Type Of Carbonsupporting

confidence: 82%

“…The estimated composition of the entire organic carbon fraction contained in each of the soils included in this study is shown in Fig. 9a, while that estimated for the Urrbrae Alfisol ) and Meadows Alfisol (Baldock unpublished) and the composition of uncultivated and cultivated Ormstown Histosol (Preston et al 1987) are presented in Fig. 9b.…”

Section: Whole Soilsmentioning

confidence: 95%

“…Solid-state CP/MAS 3 C NMR results from Oades et al (1987Oades et al ( , 1988, Baldock (unpublished) and Preston et al (1987Preston et al ( , 1989 have been included with those collected in this study to extend the range of soil orders.…”

Section: Introductionmentioning

confidence: 99%

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Aspects of the chemical structure of soil organic materials as revealed by solid-state13C NMR spectroscopy

et al. 1992

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Solid-state cross-polarisation/magic-angle-spinning 3 C nuclear magnetic resonance (CP/MAS 13 C NMR) spectroscopy was used to characterise semi-quantitatively the organic materials contained in particle size and density fractions isolated from five different mineral soils: two Mollisols, two Oxisols and an Andosol. The acquired spectra were analysed to determine the relative proportion of carboxyl, aromatic, O-alkyl and alkyl carbon contained in each fraction. Although similar types of carbon were present in all of the fractions analysed, an influence of both soil type and particle size was evident.The chemical structure of the organic materials contained in the particle size fractions isolated from the Andosol was similar; however, for the Mollisols and Oxisols, the content of O-alkyl, aromatic and alkyl carbon was greatest in the coarse, intermediate and fine fractions, respectively. The compositional differences noted in progressing from the coarser to finer particle size fractions in the Mollisols and Oxisols were consistent with the changes noted in other studies where CP/MAS 3 C NMR was used to monitor the decomposition of natural organic materials. Changes in the C:N ratio of the particle size fractions supported the proposal that the extent of decomposition of the organic materials contained in the fine fractions was greater than that contained in the coarse fractions. The increased content of aromatic and alkyl carbon in the intermediate size fractions could be explained completely by a selective preservation mechanism; however, the further accumulation of alkyl carbon in the clay fractions appeared to result from both a selective preservation and an in situ synthesis.The largest compositional differences noted for the entire organic fraction of the five soils were observed between soil orders. The differences within orders were smaller. The Mollisols and the Andosol were both dominated by O-alkyl carbon but the Andosol had a lower alkyl carbon content. The Oxisols were dominated by both O-alkyl and alkyl carbon.A model describing the oxidative decomposition of plant materials in mineral soils is proposed and used to explain the influence of soil order and particle size on the chemical composition of soil organic matter in terms of its extent of decomposition and bioavailability.

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Section: Type Of Carbonsupporting

confidence: 82%

Section: Whole Soilsmentioning

confidence: 95%

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Aspects of the chemical structure of soil organic materials as revealed by solid-state13C NMR spectroscopy

et al. 1992

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“…doi:10. 1016/j.geoderma.2004.12.004 exceeds 10% of total organic C. In lower mineral horizons, where the content of organic matter is low, the lipid fraction can comprise more than 40% of C total (Preston et al, 1987). Most agriculturally important soils have lipid contents that range from 1.2% to 6.3% of the total organic matter (Stevenson, 1992).…”

Section: Introductionmentioning

confidence: 97%

Influence of soil moisture on concentrations and 13C NMR profiles of lipids in three Albeluvisols

Лодыгин

Beznosikov

2005

Geoderma

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“…They noted that there were significant differences in soil organic carbon (SOC) content but not in chemical composition obtained with solid-state 13 C-NMR. On the other hand, Preston et al (1987) found a decrease in OC and carbohydrate contents and an increase of the aliphatic and methoxyl concentrations in peat soils with increasing cultivation. More recently, Capriel et al (1992) studied several cultivation systems on a luvisol soil derived from loess loam of Bavaria and found twofold differences in the OC content of the plots studied but similar solution 13 C-NMR and Fourier transformed infrared (FTIR) spectra of the humic and fulvic acids.…”

mentioning

confidence: 88%

Physicochemical Properties of Humus of a Semiarid Pampean Soil Under Two Crop Rotations

Rosell

Zech

Haumaier

et al. 1995

Arid Soil Research and Rehabilitation

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COMPARISON OF ¹³C CPMAS NMR AND CHEMICAL TECHNIQUES FOR MEASURING THE DEGREE OF DECOMPOSITION IN VIRGIN AND CULTIVATED PEAT PROFILES

Cited by 94 publications

References 5 publications

Aspects of the chemical structure of soil organic materials as revealed by solid-state13C NMR spectroscopy

Aspects of the chemical structure of soil organic materials as revealed by solid-state13C NMR spectroscopy

Influence of soil moisture on concentrations and 13C NMR profiles of lipids in three Albeluvisols

Physicochemical Properties of Humus of a Semiarid Pampean Soil Under Two Crop Rotations

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COMPARISON OF 13C CPMAS NMR AND CHEMICAL TECHNIQUES FOR MEASURING THE DEGREE OF DECOMPOSITION IN VIRGIN AND CULTIVATED PEAT PROFILES

Cited by 94 publications

References 5 publications

Aspects of the chemical structure of soil organic materials as revealed by solid-state13C NMR spectroscopy

Aspects of the chemical structure of soil organic materials as revealed by solid-state13C NMR spectroscopy

Influence of soil moisture on concentrations and 13C NMR profiles of lipids in three Albeluvisols

Physicochemical Properties of Humus of a Semiarid Pampean Soil Under Two Crop Rotations

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Product

Resources

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COMPARISON OF ¹³C CPMAS NMR AND CHEMICAL TECHNIQUES FOR MEASURING THE DEGREE OF DECOMPOSITION IN VIRGIN AND CULTIVATED PEAT PROFILES