Dissolved Organic Matter Within Soil Aggregates in Forest Restoration

Insights From Optical Properties

Bibliographic Data

ID21649817
AuthorsGui‐bang Zhang (State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Northwest A&F University Yangling China), Qing‐wei Zhang (0000-0003-2589-2896, State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Northwest A&F University Yangling China, corresponding author), Wen‐xuan Kuan (State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Northwest A&F University Yangling China), Jian Wang (0000-0001-6128-1254, State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Northwest A&F University Yangling China), Jun'e Liu (School of Geography and Tourism Shaanxi Normal University Xi'an China), Jun’e Liu (Shaanxi Normal University), Hao Wang (0000-0003-3392-1562, State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Northwest A&F University Yangling China), Ming Li (0000-0001-7109-5084, College of Natural Resources and Environment Northwest A&F University Yangling China)
Year2025
Volume36
Issue7
Pages2474-2488
Publication date2025-04-30
Open AccessYes
TypeARTICLE
VenueLand Degradation and Development (JOURNAL)
Journal identifiersISSN: 1085-3278 • E-ISSN: 1099-145X
PublisherWiley (PUBLISHER • GB)
DOI10.1002/ldr.5509
OpenAlexW4407262558
LanguageEN
References cited85

Forest restoration with Robinia pseudoacacia L. has many benefits, and dynamics of dissolved organic matter (DOM) might provide insight into soil restoration. Nevertheless, studies regarding the changes in the DOM within soil aggregates during artificial forest restoration are relatively limited in semiarid regions. Soil aggregates were collected from the topsoil, middle soil, and subsoil layers (i.e., 0–20, 30–50, and 80–100 cm) at six forests (i.e., R. pseudoacacia L.) lands with various restoration ages in a typical semiarid region. The variations of DOM properties in silt + clay size classes, microaggregates and macroaggregates (i.e., 0.25 mm) were explored by UV–visible and three‐dimensional excited emission matrix spectral. Overall, dissolved organic carbon (DOC) content (41.24–119.82 mg kg −1 ) of soil aggregates generally increased with restoration age. The DOC content in topsoil aggregates was 3.11–7.13 times larger than those from the other two soil layers. The molecular weight, aromaticity degree, and humification degree had the same trends as that of DOC content with soil depth. The DOC content and aromaticity degree of DOM in macroaggregates were 1.26–4.27 times and 1.01–1.18 times higher than those in microaggregates and silt + clay size classes at most soil layers, respectively. These variations in DOM within soil aggregates were primarily attributed to the changes in soil texture and the densities of plant roots and litter during the forest restoration. The study reveals the positive impact of forest restoration on the increase of DOC content, providing scientific evidence for soil management

Agronomy · Dissolved organic carbon · Humus · Litter · Organic matter · Silt · Soil carbon · Soil organic matter · Soil texture · Soil water · Subsoil · Topsoil · Total organic carbon · Chemistry · Environmental Science · Heavy metals in environment · Lichen and fungal ecology · Soil Carbon and Nitrogen Dynamics · Environmental Chemistry · Geology · Soil Science

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