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

Kód výsledku v 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>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EH - Ekologie – společenstva

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Phytopedon

ISSN

1336-1120

e-ISSN

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Svazek periodika

10

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

6

Strana od-do

60-65

Kód UT WoS článku

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EID výsledku v databázi Scopus

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