Number of the records: 1
Profile distribution of humic substances molecular fractions in mountain spruce forest soil
- 1.
SYSNO ASEP 0368843 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Profile distribution of humic substances molecular fractions in mountain spruce forest soil Author(s) Šestauberová, Martina (BC-A)
Novák, František (BC-A) RIDSource Title Phytopedon - ISSN 1336-1120
Roč. 10, č. 1 (2011), s. 60-65Number of pages 6 s. Language eng - English Country SK - Slovakia Keywords forest soil ; fulvic acids ; humic acids Subject RIV EH - Ecology, Behaviour CEZ AV0Z60660521 - UPB-H, BC-A (2005-2011) Annotation 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. Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2012
Number of the records: 1