Dissolved Organic Matter Characterization Using Multiway Spectral Decomposition of Fluorescence Landscapes

来自 EBSCO

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阅读量：

229

作者：

T Ohno，R Bro

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摘要：

Dissolved organic matter (DOM) plays an important role in many soil ecosystem functions. Multidimensional fluorescence spectroscopy of DOM with parallel factor analysis (PARAFAC) of the resulting spectral landscape has been successful in characterizing DOM from a variety of aquatic sources. This study was conducted to assess the multi-way PARAFAC approach for quantitatively characterizing the fluorescent landscapes of DOM from aqueous extracts of soils and soil amendments. The DOM was extracted from plant biomass representative of crop, wetlands, and tree species; animal manures; and soils from controlled studies of cropping systems with known histories of organic amendments. The fluorescence landscape spectra were collected in the excitation range from 240 to 400 nm and emission range from 300 to 500 nm in 3-nm increments. The excitation and emission spectra modeled from the PARAFAC analysis showed that the plant biomass, animal manure, and soil DOM contained five fluorescing components: tryptophan-li

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关键词：

fluorescence emission spectroscopy, amino acids, cropping systems, soil, soil organic matter, wetland plants, chemical analysis, fulvic acids, humic acids, organic fertilizers, crop residues, soil amendments, tyrosine, parallell factor analysis, animal manures, tryptophan, methodology, soil chemistry

DOI：

10.2136/sssaj2006.0005

被引量：

298

年份：

2006