Publication detail

Effect of Compost Application on Properties of Soil Humic Acids.

KLUČÁKOVÁ, M. ENEV, V. POSPÍŠILOVÁ, Ľ.

Original Title

Type

abstract

Language

English

Original Abstract

Humic acids represent very important part of soil organic matter. Object of our study was Luvi-haplic Chernozem (locality Praha-Ruzyně). Three different amounts were added in soil in 2008: 124, 239 and 478 t.ha-1. Soil humic substances were extracted one year after compost application into the soil and analysed by means of fluorescence spectrometry, infrared spectrometry, ultraviolet-visible spectrometry a titration methods. EEM spectra obtained using fluorescence spectrometry showed that compost contains well humified fractions of humic substances. Relativ intensity of fluorescence of all three main peaks is lower in comparison with soil humic substances due to content of young less condensed aromatic structures. Infrared spectra confirmed that increasing added amount of compost caused the increase of content of carboxylic groups and ether bridges in soil humic substances. Humification index E4/6, determined on the basis of measured UV/VIS spectra, decreased with desresing amount of added compost. Its values were higher than 4 for all extracted humic samples, which show on brown humic acids with lower molecular mass. The high value of E4/6 for compost confirmed the presence of young less condensed aromatic structures detected by fluorescence spectrometry. Because the index decreases with depth of soil horizon, we can say that lower soil layer content older more humified humic substances. Total acidities computed from titration curves increased with increasing amount of added compost which corresponds with results of other used methods.

Keywords

humic acids, stability, aromaticity

Authors

KLUČÁKOVÁ, M.; ENEV, V.; POSPÍŠILOVÁ, Ľ.

Released

17. 8. 2011

Publisher

Czech Chemical Society

Location

Brno

ISBN

0009-2770

Periodical

Chemické listy

Year of study

105

Number

State

Czech Republic

Pages from

897

Pages to

898

Pages count

BibTex

@misc{BUT74080,
  author="KLUČÁKOVÁ, M. and ENEV, V. and POSPÍŠILOVÁ, Ľ.",
  title="Effect of Compost Application on Properties of Soil Humic Acids.",
  booktitle="Chemické listy",
  year="2011",
  journal="Chemické listy",
  volume="105",
  number="18",
  pages="897--898",
  publisher="Czech Chemical Society",
  address="Brno",
  issn="0009-2770",
  note="abstract"
}