Profile distribution of humic substances molecular fractions in mountain spruce forest soil

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F11%3A00368843" target="_blank" >RIV/60077344:_____/11:00368843 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Profile distribution of humic substances molecular fractions in mountain spruce forest soil
Original language description
The objective of this study was to describe changes in molecular weight of humic (HA) and fulvic acids (FA) with depth of soil profile, and to state their mobility in a soil environment. Samples were isolated from individual podzol horizons of spruce forest in Trojmezí stand (Bohemian Forest, 48°46'25" N, 13°51'04" E). Their molecular weight Mr and weight-average molecular weight Mw were determined by the low pressure size exclusion chromatography. For the high-molecular HA fraction (HM-HA), Mr values over 250 kDa were found, while values of FA and the main HA fraction ranged between 6.4-7.6 kDa and 6.7-31.4 kDa, respectively. The Mr of humic substances and the proportion of HM-HA decreased with increasing soil depth. HA isolated from horizon Bhs didn't contain any high-molecular fraction and its molecular weight approached the values specified for FA.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
EH - Ecology - communities
OECD FORD branch
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Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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