Characteristics and controlling factors of soil dissolved organic matter in the rainy season after vegetation restoration in a karst drainage area, South China

Wang, Xinwen; Liu, Ziqi; Xiong, Kangning; He, Qing; Li, Yuan; Li, Kaiping

doi:10.1016/j.catena.2022.106483

Cited by 19 publications

(8 citation statements)

References 68 publications

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“…The SUVA 254 values at the different wolfberry planting ages were lower than those observed in the control group. This observation is consistent with the reported by Wang et al [21]. On the other hand, the E 2 / E 3 values at the wolfberry planting ages of 1 and 4 years were higher than those in the control group (Fig.…”

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

confidence: 93%

“…Li et al [20] showed that the transition from evergreen broad-leaved forest to long-term chestnut plantation increased the aliphatic and aromatic compounds of soil DOM. Wang et al [21] investigated the DOM characteristics of farmland and forestland in a significant urban fringe area in eastern China, and they found that the aromaticity of farmland soils was higher than that of forest. Li et al [19] found that the DOM content of forestland increased with time since stand establishment, especially after 20 years.…”

Section: Introductionmentioning

confidence: 99%

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

confidence: 93%

Section: Introductionmentioning

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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“…Restoring arable land to forests effectively improves forest carbon sink function and carbon storage [147][148][149]. In the expansion stage, the focus is on the ecological secondary industries and poverty alleviation, with a greater emphasis on the application of new theories and high-tech methods, and the response to policies, with more environmental factors being considered in ecological restoration and more attention being paid to the control theory and application of ecosystem function and ecological services at the county level.…”

Section: Pivotal Research Clustersmentioning

confidence: 99%

The Global Situation of Karst Desertification Research Based on Forest Ecology

Zhang,

Zhang

et al. 2024

Forests

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Karst desertification (KD) is a major ecological and environmental problem threatening human survival and development in karst areas. In order to explore the research situation and development trend of KD based on forest ecology, this paper provides a systematic literature review based on the CNKI and WoS databases, which involves search, appraisal, synthesis, and analysis. We performed a statistical and visual analysis of 2955 studies acquired between 1 January 1995 and 30 June 2023, including the time distribution of the studies, hot research trends, pivotal research clusters, literature co-citations, main publishing trends, and keyword bursts. The results show the following. (1) The literature shows a fluctuating growth trend, and the research trends are divided into accumulation, development, and expansion stages. (2) The pivotal research clusters comprised three major aspects: study area and method, driving and genetic mechanisms, and control technology and models. (3) KD research forms a China-centered research network, dominated by institutions and scholars in southwestern China. (4) Future research needs to solve a series of related scientific issues and technological needs for forest ecosystem function optimization, ecological product supply capacity enhancement, ecological product value realization, ecological industry formation, and rural revitalization in KD control. The purpose of this paper is to reveal research trends relating to KD and highlight the future direction of KD research and control.

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“…Through extended periods of natural succession, natural forests develop multi-level and multi-species vegetation compositions, resulting in rich biological diversity. This complexity and diversity contribute to higher stability in the ecological structure of natural forest systems [60][61][62][63]. And agroforestry systems are characterized by a combination of different habitat types, such as farmland and forest.…”

Section: Soil Nitrogen and Heavy Metalsmentioning

confidence: 99%

Effects of Heavy Metals on Nitrogen in Soils of Different Ecosystems in the Karst Desertification of South China

Zhang

Xiong

Wan

2023

Forests

Self Cite

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Nitrogen, as a crucial limiting nutrient in terrestrial ecosystems, plays a vital role in determining land quality. Heavy metals, as drivers of soil substance transformation, are important indicators for assessing ecosystem function. Currently, the relationship between soil nitrogen and heavy metals in karst desertification areas remains unclear. Therefore, this study focuses on the soil of grassland, forest, and agroforestry ecosystems in a karst desertification area to investigate the relationship between heavy metals and nitrogen distribution using ecological stoichiometry. The findings revealed the following: (i) Total nitrogen (TN) and available nitrogen (AN) exhibited the trend of agroforestry * > forest > grassland, while soil microbial biomass nitrogen (SMBN) showed the trend of forest * > grassland * >> agroforestry; (ii) Chromium (Cr), Ferrum (Fe), Niccolum (Ni), and Plumbum (Pb) showed the trend of agroforestry * > grassland > forest, while Cuprum (Cu) demonstrated the trend of agroforestry > grassland > forest, and Zincum (Zn) exhibited the trend of grassland > forest * >> agroforestry. The Nemerow comprehensive pollution index were 0.77 for grassland, 0.69 for forest, and 0.94 for agroforestry; (iii) The sensitivity of soil nitrogen and heavy metals ranked as grassland > agroforestry > forest. The research findings aim to provide a scientific reference for karst desertification control, ecological protection and restoration, and enhancement of ecosystem function.

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Characteristics and controlling factors of soil dissolved organic matter in the rainy season after vegetation restoration in a karst drainage area, South China

Cited by 19 publications

References 68 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

The Global Situation of Karst Desertification Research Based on Forest Ecology

Effects of Heavy Metals on Nitrogen in Soils of Different Ecosystems in the Karst Desertification of South China

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