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- Title
ANALYSIS OF THREE-DIMENSIONAL FLUORESCENCE SPECTRUM CHARACTERISTICS OF WATER EXTRACTABLE ORGANIC MATTER IN MOLLISOLS AFTER DIFFERENT YEARS OF CULTIVATION.
- Authors
WANG, T. Y.; ZHAO, X. Y.; WANG, C. Y.; HUANG, Z. Y.; LIU, S. X.
- Abstract
Three-dimensional fluorescence technology was applied to analyze the components and structures of the water extractable organic matter (WEOM) in the topsoil (0-20 cm) and a 20-40 cm depth of Mollisol of an uncultivated land or the land after of 5, 20, 50 and 100 years of reclamation, respectively. With the continuous reclamation, the content of the WEOM in the black soil has a tendency of decreasing at first but increasing subsequently. The WEOM reaches its maximum and minimum contents at 86.65 mg/kg and 47.81 mg/kg. The fluorescence intensity of the area III was enhanced. After the reclamation of 100 years, the fluorescence intensity of the areas III and Vreached to the top values, suggesting the maximum contents of fulvic acid-like and humic acid-like organic matters. The emitting lights at the fluorescence peak of the fluorescence area of humic acid-like organic matters also show red shift, indicating the increase of molecular weight, aromaticity and degree of polycondensation. However, the area Ⅳ remained unchanged. The research results showed that: with the reclamation, the components and structure, and the variation of WEOM in soil varies are related to the years of reclamation; the molecular weights, aromaticity and degrees of polycondensation in the WEOM increase evidently with the reclamation.
- Subjects
CARBON content of water; MOLLISOLS; FLUORESCENCE spectroscopy; FLUORIMETRY; BLACK cotton soil; REDSHIFT
- Publication
Applied Ecology & Environmental Research, 2019, Vol 17, Issue 4, p9925
- ISSN
1589-1623
- Publication type
Article
- DOI
10.15666/aeer/1704_99259935