Changes in soil dissolved organic matter optical properties during peatland succession

Li, Jianwei; Zhao, Liyuan; Li, Ming; Min, Yongen; Zhan, Fusen; Wang, Yong; Sheng, Lianxi; Bian, Hongfeng

doi:10.1016/j.ecolind.2022.109386

Cited by 12 publications

(5 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5A), and DOM weights of plant residues on soil surface continued to decline, indicating that the source of DOM gradually shifted from plant stubble to related microorganisms and their metabolites [101]. This finding was in line with that reported by Li et al [13], the results indicated that the litters of wolfberry orchard had lower lignin content and were more bioavailable to microorganisms [102], this finding was in line with that reported by Zhang et al [98]. The HIX is closely related to soil microbial activities, reflecting humus contents or SOM humification degrees.…”

Section: Effects Of the Different Wolfberry Planting Ages On Soil Dom...supporting

confidence: 89%

“…These factors include soil physicochemical properties (e.g., pH, nutrients, and C/N) [1,[10][11][12], land use patterns, ecosystem types and years of planting. Research shows that soil pH was the key factor affecting DOM composition in the upper soil layers during peatland succession [13]. In addition, available nutrients and magnesium (Mg) forms in soils were positively associated with labile carbon inputs, while available calcium (Ca) forms were positively associated with stable carbon inputs, demonstrating that the availability of soil nutrients and minerals are influential factors of the DOM carbon-containing groups [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…The humification index (HIX), fluorescence index (FI), and biological index (BIX) were used in several studies to determine the humification degrees, main sources, and autogenic contributions of DOM, respectively [17,29]. Many studies have assessed DOM characteristics by combining excitation-emission matrices (EEMs) with parallel factor analysis (PARAFAC) [13,24,30]. Zhang et al [14] used the EEMs-PAFAFAC approach and found that interplanting white clover in orchards can effectively improve the accumulation of macromolecular humic-like compounds of DOM, potentially promoting SOC storage.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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.

View full text Add to dashboard Cite

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

show abstract

Section: Effects Of the Different Wolfberry Planting Ages On Soil Dom...supporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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.

View full text Add to dashboard Cite

show abstract

“…biomass and litter input) and belowground processes (e.g. root turnover, rhizodeposition, and mycorrhizal symbiosis; Klein et al ., 2022; Li et al ., 2022; Shi et al ., 2022). Across northern peatlands, however, the carbon sink capacity in response to tree encroachment may either increase (Minkkinen et al ., 2018; Hermans et al ., 2022) or decrease (Simola et al ., 2012; Hommeltenberg et al ., 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Water‐table drawdown and subsequent tree encroachment typically results in intensively humified (less decomposable) peats due to oxidation and changes in plant litter quantity and quality (Blodau & Siems, 2012; Urbanová & Bárta, 2016; Kane et al ., 2019; Normand et al ., 2021; Li et al ., 2022; Uhelski et al ., 2022). Consequently, decomposition may become increasingly dependent on oxidative enzymes, as oxidation progresses during postdrainage succession.…”

Section: Introductionmentioning

confidence: 99%

Peat loss collocates with a threshold in plant–mycorrhizal associations in drained peatlands encroached by trees

et al. 2023

View full text Add to dashboard Cite

Summary Drainage‐induced encroachment by trees may have major effects on the carbon balance of northern peatlands, and responses of microbial communities are likely to play a central mechanistic role. We profiled the soil fungal community and estimated its genetic potential for the decay of lignin and phenolics (class II peroxidase potential) along peatland drainage gradients stretching from interior locations (undrained, open) to ditched locations (drained, forested). Mycorrhizal fungi dominated the community across the gradients. When moving towards ditches, the dominant type of mycorrhizal association abruptly shifted from ericoid mycorrhiza to ectomycorrhiza at c. 120 m from the ditches. This distance corresponded with increased peat loss, from which more than half may be attributed to oxidation. The ectomycorrhizal genus Cortinarius dominated at the drained end of the gradients and its relatively higher genetic potential to produce class II peroxidases (together with Mycena) was positively associated with peat humification and negatively with carbon‐to‐nitrogen ratio. Our study is consistent with a plant–soil feedback mechanism, driven by a shift in the mycorrhizal type of vegetation, that potentially mediates changes in aerobic decomposition during postdrainage succession. Such feedback may have long‐term legacy effects upon postdrainage restoration efforts and implication for tree encroachment onto carbon‐rich soils globally.

show abstract

Evolving characteristics of dissolved organic matter in soil profiles during 56 years of revegetation in Mu Us Sandy Land

Wang,

Hu,

Zhou

et al. 2023

Plant Soil

View full text Add to dashboard Cite

Changes in soil dissolved organic matter optical properties during peatland succession

Cited by 12 publications

References 43 publications

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

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

Peat loss collocates with a threshold in plant–mycorrhizal associations in drained peatlands encroached by trees

Evolving characteristics of dissolved organic matter in soil profiles during 56 years of revegetation in Mu Us Sandy Land

Contact Info

Product

Resources

About