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

Title
Changes in the dissolved organic matter leaching from soil under severe temperature and N-deposition
Authors
NguyenH.V.-M.ChoiJ.H.
Ewha Authors
최정현
SCOPUS Author ID
최정현scopus
Issue Date
2015
Journal Title
Environmental monitoring and assessment
ISSN
1573-2959JCR Link
Citation
vol. 187, no. 6, pp. 323
Indexed
SCIE; SCOPUS WOS scopus
Abstract
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.
DOI
10.1007/s10661-015-4549-8
Appears in Collections:
엘텍공과대학 > 환경공학전공 > Journal papers
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