Publication detail

Fractionation of humus and optical properties of humic acids originating from different soil types.

FASUROVÁ, N. POSPÍŠILOVÁ, Ľ.

Original Title

Fractionation of humus and optical properties of humic acids originating from different soil types.

Type

journal article - other

Language

English

Original Abstract

Assesment of soil organic matter quality is one of the urgent problems of contemporary agriculture. Determination of humic acids (HAs) optical properties using spectroscopic techniques could be a reliable step for this evaluation. We followed differences in the functional groups of HAs preparations and showed correlation between optical indexes and fractional composition of humus. UV-VIS and SFS spectral lines and indexes were measured in mixture 0.1M pyrophosphate sodium solution and 0,1M NaOH, after filtration and appropriate dilution. Differences in the structural composition of HAs originating from different soil types were studied after isolation of HAs preparations using FTIR spectroscopy (KBr + HAs pellets, SRATR FTIR method). Results showed that studied HAs preparations could be divided into two groups. First group included HAs isolated from Chernozem and Haplic Luvisol with higher content of aromatic constituents and condensation degree. The second group were HAs isolated from Eutric Cambisol and Fluvi-Eutric Gleysol. They reflected lower content of aromatic compounds, lower condensation degree and more aliphatic structural groups in the HAs molecule. Linear correlation between fractional composition of humus and optical indexes (I501/I487, Q4/6) was found.

Keywords

humus fractionation, humic acids, UV-Vis, FTIR, SFS spectra, Chernozem, Haplic Luvisol, Eutric Cambisol, Fluvi-Eutric Gleysol

Authors

FASUROVÁ, N.; POSPÍŠILOVÁ, Ľ.

RIV year

2006

Released

20. 4. 2006

Location

Brno, MZLU

ISBN

1211-8516

Periodical

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis

Year of study

LIV

Number

4

State

Czech Republic

Pages from

45

Pages to

52

Pages count

8

BibTex

@article{BUT43641,
  author="Naděžda {Fasurová} and Ľubica {Pospíšilová}",
  title="Fractionation of humus and optical properties of humic acids originating from different soil types.",
  journal="Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis",
  year="2006",
  volume="LIV",
  number="4",
  pages="45--52",
  issn="1211-8516"
}