Počet záznamů: 1
Profile distribution of humic substances molecular fractions in mountain spruce forest soil
- 1.
SYSNO ASEP 0368843 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Profile distribution of humic substances molecular fractions in mountain spruce forest soil Tvůrce(i) Šestauberová, Martina (BC-A)
Novák, František (BC-A) RIDZdroj.dok. Phytopedon - ISSN 1336-1120
Roč. 10, č. 1 (2011), s. 60-65Poč.str. 6 s. Jazyk dok. eng - angličtina Země vyd. SK - Slovensko Klíč. slova forest soil ; fulvic acids ; humic acids Vědní obor RIV EH - Ekologie - společenstva CEZ AV0Z60660521 - UPB-H, BC-A (2005-2011) Anotace 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. Pracoviště Biologické centrum (od r. 2006) Kontakt Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Rok sběru 2012
Počet záznamů: 1