Changes in the dissolved organic matter leaching from soil under severe temperature and N-deposition

Hang Vo Minh Nguyen, Jung Hyun Choi

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7 Scopus citations


In this study, we conducted growth chamber experiments using three types of soil (wetland, rice paddy, and forest) under the conditions of a severe increase in the temperature and N-deposition in order to investigate how extreme weather influences the characteristics of the dissolved organic matter (DOM) leaching from different soil types. This leachate controls the quantity and quality of DOM in surface water systems. After 5 months of incubation, the dissolved organic carbon (DOC) concentrations decreased in the range of 21.1 to 88.9 %, while the specific UV absorption (SUVA) values increased substantially in the range of 19.9 to 319.9 % for all of the samples. Higher increases in the SUVA values were observed at higher temperatures, whereas the opposite trend was observed for samples with N-addition. The parallel factor analysis (PARAFAC) results showed that four fluorescence components: terrestrial humic-like (component 1 (C1)), microbial humic-like (component 2 (C2)), protein-like (component 3 (C3)), and anthropogenic humic-like (component 4 (C4)) constituted the fluorescence matrices of soil samples. During the experiment, labile DOM from the soils was consumed and transformed into resistant aromatic carbon structures and less biodegradable components via microbial processes. The principle component analysis (PCA) results indicated that severe temperatures and N-deposition could enhance the contribution of the aromatic carbon compounds and humic-like components in the soil samples.

Original languageEnglish
Article number323
Pages (from-to)1-15
Number of pages15
JournalEnvironmental Monitoring and Assessment
Issue number6
StatePublished - 1 Jun 2015

Bibliographical note

Publisher Copyright:
© 2015, Springer International Publishing Switzerland.


  • DOC
  • Extreme weather
  • Fluorescence
  • N-deposition
  • Soil leaching


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