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- W2107083585 abstract "Mull, moder, and mor humus profiles were investigated for their total lipid contents and the behaviour of lipid-phosphorus and of five neutral lipid classes identified by HPTLC. The quantitative distribution of total and neutral lipids among the humus types is, besides by natural differences between the various parent litter materials, mainly controlled by soil physicochemical properties. In particular strongly acidic conditions, i.e. conditions corresponding to a reduced biological activity, inhibit significantly the decomposition of lipid compounds in (moder and) mor humus. A feature of the lipid depth functions is the input of microbial and root litter-derived lipid material in the fermentation layers and a considerable lipid accumulation in the A horizons, probably at least partly due to mechanical transport processes. Phospholipids show no distinct variation dependent on the humus type, as far as the organic layers are concerned. But obviously, lipid-P in the mineral, soil is closely correlated with, and therefore is a valuable measure for, the overall biological activity increasing from mor to moder and mull humus.Verteilungsmuster von Gesamtlipiden und Lipidfraktionen in WaldhumusMull-, Moder- und Rohhumusprofile wurden in Hinblick auf ihre Gesamtlipidgehalte, sowie auf das Verhalten von Lipid-Phosphor und von funf dunnschichtchromatographisch identifizierten Neutrallipidklassen untersucht. Die Verteilung von Gesamt- und Neutrallipiden wird, abgesehen von der naturlichen Variation im unterschiedlichen Streumaterial, hauptsachlich durch die physikalisch-chemischen Bodeneigenschaften bestimmt. Insbesondere stark saure Bedingungen, die eine reduzierte biologische Aktivitat zur Folge haben, hemmen entscheidend die Lipidzersetzung in (Moder und) Rohhumus. Die Lipid-Tiefenfunktionen zeichnen sich besonders durch den Input von mikrobiellen und Wurzelstreu-Lipiden in den Of-Lagen aus, sowie durch eine betrachtliche Lipid-Anreicherung im mineralischen Oberboden, die wohl zumindest teilweise auf mechanische Verlagerungsprozesse zuruckzufuhren ist. Die Phospholipid-Gehalte zeigen kaum Unterschiede in Abhangigkeit von der Humusform, was die Auflagehorizonte anbelangt. Lipid-P im Mineralboden ist aber offensichtlich eng mit der von Rohhumus uber Moder nach Mull ansteigenden biologischen Aktivitat korreliert und kann somit diesbezuglich als relatives Mas verwendet werden." @default.
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- W2107083585 date "1989-01-01" @default.
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- W2107083585 title "Distribution pattern of total lipids and lipid fractions in forest humus" @default.
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- W2107083585 doi "https://doi.org/10.1002/jpln.19891520304" @default.
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