Der heutige Stand der Humusuntersuchungsmethodik mit besonderer Berücksichtigung der Trennung, Bestimmung und Charakterisierung der Huminsäuretypen und ihre Anwendung auf charakteristische Humusformen

Springer, U.

doi:10.1002/jpln.19380060504

Cited by 86 publications

(3 citation statements)

References 11 publications

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“…humates, being too weak to hydrolyse organo-mineral complexes, whereas sodium hydroxide (0.1 N) and sodium fluoride (0.2 N) are able to dissolve humates combined with minerals. Springer [34] considers that the natural fertility of the chernozems is associated with the great stability of their clay-humus complexes.…”

Section: Interaction Of Organic and Inorganic Soil Colloidsmentioning

confidence: 99%

A Review of Recent Work on Soil Organic Matter Part I

Bremner

1951

Journal of Soil Science

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ALTHOUGH no great progress has been made in the study of soil organic matter since Waksman's comprehensive review of the subject in 1938 (I), much useful information has been obtained and several points have been clarified. Since the literature published during this eriod is too extenthe important developments in the field. Progress in other directions will be reviewed later. The Uronic Fraction of Soil Organic MatterUronic acids are commonly determined by the method of Lefcvre and Tollens (2) which de ends upon the fact that uronic acids are quantitaThis method has been applied to soils by various workers (3-13) and the results have been taken to indicate that a considerable fraction of soil organic matter is in the form of uronide material. Shore and Martin ( ), per cent. of the organic carbon in nine soils examined could be accounted for as uronic carbon. Results obtained by Norman and Bartholomew 7) indicatd that about 1-15 er cent. of the organic carbon of surface with depth, particularly in podzolized soils, in which a marked accumulation was found in the B horizon. The a parent uronic carbon in the B, Fuller (10) founJthat about 9-23 per cent. of the organic carbon in surface soils and 19-30 per cent. of that in subsoils a peared to be uronic. Data obtained by Fuller, Bartholomew, and d r m a n (9) on samples of a single soil type indicated that in spite of wide variations in clay content and organic carbon the roportion of uronic carbon to total carbon remained rather constant. puller (11) determined the ap arent continuously to a single crop for 25 or more years or to a stable crop rotation and found that the proportion of uronic to total carbon in a sin le soil type changed only slightly as a result of different cro ping related to the total carbon content t an to the nature of the crop or cro pin system; the lower the total carbon content of a given soil, the hig R f l er t e percentage of uronic carbon in the organic matter, regardless of the crop. As much as 3-40 per cent. of the total carbon in several of the soils appeared to be uronic.Although the term 'apparent uronic carbon' has been used in the sive for adequate treatment here, this article will dea P with only a few of tively decarboxylate B when boiled with 12 per cent. hydrochloric acid.who first used the method for soil analysis, found that Y rom 12.8 to 22.4 in a stud of the distribution of apparent uronic carbon in 20 soil profi I es soils is in the form of uroni B es. The proportion was found to increase sample of a sand loam represented 3 t) per cent. of the total carbon. uronic carbon in the surface soils of 9 soil types that had been p f anted an fertilizer treatments. The chan es appeared to be more c P osely c f P

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Section: Interaction Of Organic and Inorganic Soil Colloidsmentioning

confidence: 99%

A Review of Recent Work on Soil Organic Matter Part I

Bremner

1951

Journal of Soil Science

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“…Initially, the term “lignohumate” was characterized by Springer [ 23 ] as the humic material with lower ripeness and nitrogen content and a relatively high proportion of sulfonic acidic groups (as distinguished from the “true” soil humic material). Lignohumate has structure and properties similar to humic substances isolated from native matrices.…”

Section: Introductionmentioning

confidence: 99%

How the Supramolecular Nature of Lignohumate Affects Its Diffusion in Agarose Hydrogel

2020

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Lignohumate, as an industrially produced analog of natural humic substances, is studied from the point of view of its diffusion properties. This work focuses on its permeation ability, important in agricultural and horticultural applications, connected with its penetration into plant organs as leaves and roots. The hydrogel based on agarose was used as a model material for the diffusion of lignohumate. Two types of experiments were realized: the diffusion of lignohumate in the hydrogel diffusion couple and the diffusion of lignohumate from its solution into hydrogel. The diffusion coefficient of lignohumate in the hydrogel was determined and used for the modelling of the time development of concentration profiles. It was found that the model agrees with experimental data for short times but an accumulation of lignohumate in front of the interface between donor and acceptor hydrogels was observed after several days. The particle size distribution of lignohumate and changes in the E4/E6 ratio used as an indicator of molecular weight of humic substances were determined. The results showed that the supramolecular structure of lignohumate can react sensitively to actual changes in its environs and thus affect their mobility and permeability into different materials. A filtration effect at the interface can be observed as an accompanying phenomenon of the re-arrangement in the lignohumate secondary structure.

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“…The aim was to provide a more precise alternative to von Post's (1922) fieldwork-based method of assessing humification. The colorimetric method was first formulated by Melin & Odén (1916) for characterizing humus, and was further developed by Springer (1938) and Souci (1938). After consideration of other indicators of peat decay, such as polysaccharide content and a method involving acetyl bromide, Overbeck adopted the colorimetric method and demonstrated a general correspondence with the von Post scale (Overbeck & Schneider 1940).…”

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confidence: 99%

The influence of vegetation composition on peat humification: implications for palaeoclimatic studies

Yeloff¹,

Mauquoy²

2006

Boreas

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Peat humification analysis is a widely used palaeoclimate proxy. However, recent studies combining humification with other proxies of mire surface wetness have identified inconsistencies between the records. We illustrate this inconsistency by comparing humification records with plant macrofossil profiles in three ombrotrophic bogs. Peat humification is a measure for organic decay and reflects changing palaeohydrological conditions and former vegetation composition. The resulting signal is considered to be a derived response to climate. However, even minor changes in the botanical composition of the peat may have a significant influence on humification measurements. The implications of this for palaeoclimate studies are discussed. The assumption that climate has been the major influence on variations in humification rests on the botanical composition being relatively homogeneous throughout the peat profile, and is therefore questionable. Consideration should be given to developing species-specific measures of humification and to testing the assumption that the major influence on peat humification is the surface wetness of the bog (and therefore climate).

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Der heutige Stand der Humusuntersuchungsmethodik mit besonderer Berücksichtigung der Trennung, Bestimmung und Charakterisierung der Huminsäuretypen und ihre Anwendung auf charakteristische Humusformen

Cited by 86 publications

References 11 publications

A Review of Recent Work on Soil Organic Matter Part I

A Review of Recent Work on Soil Organic Matter Part I

How the Supramolecular Nature of Lignohumate Affects Its Diffusion in Agarose Hydrogel

The influence of vegetation composition on peat humification: implications for palaeoclimatic studies

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