Tracking soil carbon processes in two temperate forests at different successional stages using stable and radioactive carbon isotopes

Wang, Kai Bo; Deng, Lei; Di, Dong Rui; He, Xinhua; Shi, Wei

doi:10.1016/j.agee.2020.107143

Cited by 13 publications

(4 citation statements)

References 52 publications

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“…On the other hand, long-term cultivation of wolfberry in semi-arid and arid regions can increase organic residue inputs, such as fine root biomass, litter biomass, above-ground biomass, and subsurface biomass, due to good soil moisture conditions, contributing greatly to the soil C pool, which is consistent with the results of Shi et al [62]. Total N (TN) is an essential element for biological growth, improving plant productivity, and increasing SOM content [63]. In this study, long-term cultivation of wolfberry and the continuous application of litters and fertilizers/organic fertilizers continuous application of fertilizer/organic fertilizer in the wolfberry orchards affected the quantity and quality of litter and root biomass [64], thus promoting the accumulation of soil TN content and affecting the SOM contents.…”

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

confidence: 85%

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 The Soil...supporting

confidence: 85%

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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“…After the local residents moved out around 1860, the cultivated land in different periods was abandoned, and the vegetation began to recover naturally on this basis. Secondary vegetation have naturally regenerated on abandoned FL from GL and SL to PF, it eventually developed into CF over the past approximately 160 years (Deng et al, 2018; Wang et al, 2020). A natural secondary forest vegetation succession sequence with large‐time span and less disturbance has been formed in this region (Deng et al, 2016; Deng et al, 2018; Zhang et al, 2016), and provides an ideal platform for studying the dynamics and stability mechanisms of soil microbial carbon with long‐term vegetation succession.…”

Section: Methodsmentioning

confidence: 99%

“…Abandoning farmland for vegetation restoration is a traditional method that has been widely used to prevent soil erosion and restore the ecological environment on the Loess Plateau (Deng & Shangguan, 2021; Wang et al, 2020). In recent years, many studies have investigated the effects of afforestation on soil carbon and nitrogen dynamics (Deng & Shangguan, 2017, 2021), litter decomposition (Liu et al, 2021), microbial dynamics, and soil enzyme activities (Ren et al, 2016; Zhang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Changes in soil microbial metabolic activity following long‐term forest succession on the central Loess Plateau, China

et al. 2022

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Forest succession can alter terrestrial ecosystem processes and potentially impact subsurface carbon dynamics. However, the effects of long-term forest succession on soil microbial metabolic activity remain unclear. This study investigated a long-term forest succession approximately ~160 years after farmland abandonment on the central Loess Plateau, China, to explore the changes in soil microbial metabolism following the forest succession. Among them, the soil basal respiration (BR), microbial quotient (qMB), and metabolic quotient (qCO 2 ) were studied. The results showed that the BR and qCO 2 were increased following forest succession, whereas the qMB showed the opposite trend. Forest succession also increased the activities of β-1,4-glucosidase (BG) and β-D-cellobiosidase (CBH). The increase of BR and qCO 2 and the decrease of qMB occurred in the early stage (<60 years). However, the increase of BG and CBH mainly occurred in the later period (>100 years). Soil microbial metabolic activity was closely related to litter biomass, dissolved organic carbon, fungal, and bacterial community composition. In conclusion, long-term forest succession changes soil microbial community structure and promotes soil organic carbon accumulation, while the increase of soil respiration and metabolism promotes the release of carbon element following forest succession, thus reducing soil microbial carbon utilization efficiency.

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“…In recent decades, stable carbon isotopes have been widely used to quantitatively assess the generation, stability, and turnover of SOC (Poeplau et al 2018). This is the most effective method, which allows the identification of the sources and processes of carbon fractions (Liu et al https://doi.org/10.17221/101/2022-SWR 2018; Wang et al 2020), which relative contribution of new SOC and old SOC can be estimated (Zhang et al 2015;Dou et al 2017;Jiang et al 2019). Stable carbon isotopes can also link aggregate dynamics with organic matter, revealing long-term changes in SOC composition (Wang et al 2020;Xiao et al 2022).…”

mentioning

confidence: 99%

δ<sup>13</sup>C as a tool to determine the origin of soil organic carbon: Case study of a restored sloping orchard

Muršec¹,

Lévêque²

2023

Soil Water Res.

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The effect of drip irrigation on the origin and size fraction of soil organic carbon was studied in the soils of an apple orchard (Malus domestica Borkh.) on hilly (20%) terrain in northeastern Slovenia in three slope positions (upslope, midslope and downslope), comparing irrigated with non-irrigated soils. Physical fractionation of soil organic carbon was performed on three soil layers (0-0.05, 0.05-0.15 and 0.15-0.30 m) in three size fractions: fraction A (> 0.0002 m), fraction B (0.0002-0.00005 m) and fraction C (< 0.00005 m). Fraction A was the richest in soil organic carbon (7.7%), but fraction C was the dominant fraction in the total soil volume (86-92%), making it the largest source of soil organic carbon (73%). The δ 13 C signature was performed to determine the existence of two different types (origins) of soil organic carbon: fresh and sedimentary. Fresh organic carbon dominates in the A fraction, while sedimentary organic carbon dominates in the C fraction and may contribute to higher structural stability, besides higher carbonates in the finest fraction. Irrigation mainly contributes to the higher stock of soil organic carbon (predominantly fresh and less sedimentary) in the coarse A fraction (21.14 t/ha in irrigated and 14.17 t/ha in non-irrigated soils).

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Tracking soil carbon processes in two temperate forests at different successional stages using stable and radioactive carbon isotopes

Cited by 13 publications

References 52 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

Changes in soil microbial metabolic activity following long‐term forest succession on the central Loess Plateau, China

δ<sup>13</sup>C as a tool to determine the origin of soil organic carbon: Case study of a restored sloping orchard

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