Assessment of the content, structure, and source of soil dissolved organic matter in the coastal wetlands of Jiaozhou Bay, China

Xi, Min; Yuanyuan, Zi; Wang, Qinggai; Wang, Sen; Cui, Guolu; Kong, Fanyu

doi:10.1016/j.pce.2017.03.004

Cited by 60 publications

(5 citation statements)

References 20 publications

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“…The results are similar to those reported for sediment estuarine [3,51]. A BIX value greater than 1, explains the increase in autochthonous components, whereas a low BIX value between 0.6 and 0.7 showed terrigenous input or human impacts are large [36]. Since there are significant differences of BIX value between the DOM (p < 0.05), it explained the possibilities of a different magnitude of an autochthonous and allochthonous component among the DOM samples.…”

Section: Fluorescent Properties Of Domsupporting

confidence: 87%

“…The DOM′s UV-Vis absorption was attributed to its unsaturated bond and aromatic composition. The absorption or ratio of UV-Vis at specific wavelengths has therefore been widely used to investigate the structural characteristics of DOM, such as the content of aromatic compounds, the degree of polymerisation and the molecular weight [36]. The DOM UV-Vis absorption spectrum (Figure 3) shows an exponential decrease with increasing wavelengths, following a pattern similar to that already described for the sample of natural organic matter [37].…”

Section: Uv-visspectroscopy Analysismentioning

confidence: 58%

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Bulk Chemical and Optical Spectroscopy Characterisations of Dissolved Organic Matter Extracted from the Tropical Coastal Sediment

Dzulkafli

Mahdzir

Hara

2021

JMSE

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The study of organic matter characterisation in coastal sediment is useful for understanding how dissolved organic matter (DOM) reactivity influences the fate of pollutants in the aquatic environment. However, there is little information available on the structural properties of DOM in coastal sediment. Chemical analysis, UV-Visible (UV-Vis) absorbance, fluorescence, and Fourier-transform infrared (FTIR) spectroscopy were used in this work to characterise and compare the components of water-extractable organic matter (WEOM) fractions from sediment from an estuary, a coastal area, and a port in Peninsular Malaysia, Malaysia. The elemental analysis (H/C and C/N ratios) of the three samples differed, which coincided with the findings of optical indices estimated from UV-Visible and fluorescent spectroscopy analyses. WEOM had an average output of 7.05 to 8.47 mg/L and was very dominating with heavy fraction organic carbon (HFOC). In DOM-KS and DOM-K sediments, the allochthonous component with a high degree of condensation and the aromatic compound was the dominating composition. Meanwhile, the DOM-KT possessed a high autochthonous composition as well as carboxylic and phenolic content. Correlation analysis indicates that the aromaticity index SUVA254 and humification index (HIX) have positive correlations. The combined results of the chemical and spectroscopic analyses indicate that different coastal ecosystems, with the integration of various human and land activities, produce variations in DOM in the coastal area.

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Section: Fluorescent Properties Of Domsupporting

confidence: 87%

Section: Uv-visspectroscopy Analysismentioning

confidence: 58%

Bulk Chemical and Optical Spectroscopy Characterisations of Dissolved Organic Matter Extracted from the Tropical Coastal Sediment

Dzulkafli

Mahdzir

Hara

2021

JMSE

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“…On the vertical direction, CDOM showed a decreasing trend with the increase of soil depth. 72 In addition, it contents changed with the seasons, in order of spring > summer > autumn > winter. The CDOM contents in horizontal direction, the moisture content, pH, and soil microorganism affected the humidification and mineralization processes of organic matter, which further affected the variation of DOM structure.…”

Section: Sources and Structure Of Dom In Farmland Soilmentioning

confidence: 99%

“…7,22 The content of DOM (less than 0.5% of soils organic carbon (SOC)) in soil was generally relatively low, but it was one of the most active components in the soil ecological environment, it also may most rapidly reect changes in the condition of a soil. 23 As the organic fertilizer application and direct straw returning are widely used measures for farmland soil improvement in agricultural country, a mass of exogenous DOM are being taken into farmland leading to an increase in DOM content of farmland soil. 24,25 According to relevant report, the content of DOM always in a dynamic process.…”

Section: Introductionmentioning

confidence: 99%

Structural characteristics, analytical techniques and interactions with organic contaminants of dissolved organic matter derived from crop straw: a critical review

et al. 2018

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“…This finding suggests that long-term wolfberry planting led to a continuous increase in the DOM content over the entire study period. It might be due to the fact that long-term planting of wolfberry promoted increases in the plant, litter, and root biomass, which can undergo continuous microbial decomposition and, consequently, gradually increase soil DOM concentrations [19,74]. At the same time, as perennial plants such as wolfberry remain on the soil surface, anaerobic microorganisms may increase and affect soil humidity and temperature, thus affecting the decomposition of plant residues and promoting DOM accumulation [75,76].…”

Section: Effects Of the Different Wolfberry Planting Ages On The Soil...mentioning

confidence: 99%

Variations in the quantity and chemical composition of soil dissolved organic matter along a chronosequence of wolfberry plantations in an arid area of Northwest China

Wu,

Xue,

Ndzana

et al. 2024

Chem. Biol. Technol. Agric.

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Background Dissolved organic matter (DOM) is the most active component of soil organic matter (SOM), playing a major role in regulating soil fertility and carbon cycling. However, the effects of different wolfberry (Lycium barbarum L.) planting ages on the chemical diversity of DOM and its interaction with soil physicochemical properties have not been comprehensively studied. In this context, we collected soil samples (0–10 cm) from wolfberry orchards at different planting ages (1, 4, 6, 10, and 13 years) and from a corn field (0 years) in the arid region of Northwest Ningxia in China to assess the changes in soil DOM quantity and quality using ultraviolet–visible absorbance, fluorescence spectroscopy, and parallel factor analysis. Results We found that the ages of the wolfberry plantation changed the contents of soil nutrients and SOM. In addition, significantly higher DOM concentrations were observed at wolfberry planting ages of 10 and 13 years than those in the control group (0 years) by 176.6 and 190.2%, respectively. The specific ultraviolet absorbance at 254 nm (SUVA254) and 254 nm to 365 nm ultraviolet absorbance ratio (E2/E3) values were decreased and increased, respectively, after wolfberry planting, indicating low aromatic and molecular weight compounds of soil DOM. The biogenic index (BIX) and fluorescence index (FI) of soil DOM ranged from 0.6 to 0.7 and 1.42 to 1.93, respectively, suggesting a combination of allochthonous and autochthonous sources. The short- and long-term wolfberry cultivations of 1 and 4 years decreased and increased the humification degrees of soil DOM, respectively. The contribution rate of the protein-like (C1) fluorescence intensity decreased, while that of the fulvic acid-like component (C3) increased with increasing wolfberry planting age, suggesting a change in the structure of soil DOM from protein-like to fulvic acids. In this study, total nitrogen (TN) and exchangeable Ca2+ were the main factors affecting the quantity and quality of soil DOM in the wolfberry orchards with different planting ages. Conclusions This study demonstrated that long-term wolfberry plantation enhances the accumulation of soil DOM and more complex compounds, thereby promoting soil organic carbon sequestration under different planting ages and land-use types in terrestrial ecosystems. Graphical Abstract

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Assessment of the content, structure, and source of soil dissolved organic matter in the coastal wetlands of Jiaozhou Bay, China

Cited by 60 publications

References 20 publications

Bulk Chemical and Optical Spectroscopy Characterisations of Dissolved Organic Matter Extracted from the Tropical Coastal Sediment

Bulk Chemical and Optical Spectroscopy Characterisations of Dissolved Organic Matter Extracted from the Tropical Coastal Sediment

Structural characteristics, analytical techniques and interactions with organic contaminants of dissolved organic matter derived from crop straw: a critical review

Variations in the quantity and chemical composition of soil dissolved organic matter along a chronosequence of wolfberry plantations in an arid area of Northwest China

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