Soil erosion affects variations of soil organic carbon and soil respiration along a slope in Northeast China

Li, Tong; Zhang, Haicheng; Wang, Xiaoyuan; Cheng, Shulan; Fang, Huajun; Liu, Gang; Yuan, Wenping

doi:10.1186/s13717-019-0184-6

Cited by 51 publications

(27 citation statements)

References 46 publications

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“…Soil erosion and SOC deposition along hillslopes can lead to spatial redistribution of SOC, i.e., the removal of soils that are rich in organic carbon from source hillslopes (shoulder and backslope) and their accumulation at the footslope (Wang et al, 2017). It has been confirmed that the SOC content in the cultivated areas of the Loess Plateau had the following distribution pattern: sedimentary area > stable area > eroded area (Wang et al, 2014a;Li et al, 2019). In our study, considering the first 30 cm, the SOC distribution along the hillslope after vegetation restoration followed a similar trend.…”

Section: Effect Of Vegetation Restoration On Soc Migration At the Soimentioning

confidence: 88%

“…In some simulations in hillslope plots, the distribution of labile organic carbon varied markedly along slopes (Berhe and Torn, 2017), and most followed the trend: sedimentary area > stable area > eroded area (Doetterl et al, 2012;Patton et al, 2019;Wang et al, 2019). However, current research on the distribution of the SOC in the extension of slopes focuses primarily on agricultural land or grassland (Kirkels et al, 2014;Doetterl et al, 2016;Li et al, 2019). Vegetation restoration is recognized widely as an effective way to enhance SOC content and control soil erosion (Kim and Kirschbaum, 2015;Xin et al, 2016;Hancock et al,2019).…”

Section: Introductionmentioning

confidence: 99%

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Vegetation Restoration Alleviated the Soil Surface Organic Carbon Redistribution in the Hillslope Scale on the Loess Plateau, China

Liang

Zha

et al. 2021

Front. Environ. Sci.

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The redistribution of soil organic carbon (SOC) in response to soil erosion along the loess slope, China, plays an important role in understanding the mechanisms that underlie SOC’s spatial distribution and turnover. Consequently, SOC redistribution is key to understanding the global carbon cycle. Vegetation restoration has been identified as an effective method to alleviate soil erosion on the Loess Plateau; however, little research has addressed vegetation restoration’s effect on the SOC redistribution processes, particularly SOC’s spatial distribution and stability. This study quantified the SOC stock and pool distribution on slopes along geomorphic gradients in naturally regenerating forests (NF) and an artificial black locust plantation (BP) and used a corn field as a control (CK). The following results were obtained: 1) vegetation restoration, particularly NF, slowed the migration of SOC and reduced the heterogeneity of its distribution effectively. The topsoil SOC ratios of the sedimentary area to the stable area were 109%, 143%, and 210% for NF, BP, and CK, respectively; 2) during migration, vegetation restoration decreased the loss of labile organic carbon by alleviating the loss of dissolved organic carbon (DOC) and easily oxidized organic carbon (EOC). The DOC/SOC in the BP and NF increased significantly and was 13.14 and 17.57 times higher, respectively, than that in the CK (p < 0.05), while the EOC/SOC in the BP and NF was slightly higher than that in the CK. A relevant schematic diagram of SOC cycle patterns and redistribution along the loess slope was drawn under vegetation restoration. The results suggest that vegetation restoration in the loess slope, NF in particular, is an effective means to alleviate the redistribution and spatial heterogeneity of SOC and reduce soil erosion.

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Section: Effect Of Vegetation Restoration On Soc Migration At the Soimentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Vegetation Restoration Alleviated the Soil Surface Organic Carbon Redistribution in the Hillslope Scale on the Loess Plateau, China

Liang

Zha

et al. 2021

Front. Environ. Sci.

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“…Third, previous studies have found that the concentrations of both soil organic C (Li et al 2019) and amino sugars (Ni et al 2020b) significantly varied at different depths. To allow valid comparisons to assess the influence of N addition on soil microbial necromass C from different studies, only the data from samples that were collected in the upper 20-cm layer of soils were included in our dataset.…”

Section: Data Compilationmentioning

confidence: 93%

Increased microbial sequestration of soil organic carbon under nitrogen deposition over China’s terrestrial ecosystems

et al. 2020

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Background China’s terrestrial ecosystems have been receiving increasing amounts of reactive nitrogen (N) over recent decades. External N inputs profoundly change microbially mediated soil carbon (C) dynamics, but how elevated N affects the soil organic C that is derived from microbial residues is not fully understood. Here, we evaluated the changes in soil microbial necromass C under N addition at 11 forest, grassland, and cropland sites over China’s terrestrial ecosystems through a meta-analysis based on available data from published articles. Results Microbial necromass C accounted for an average of 49.5% of the total soil organic C across the studied sites, with higher values observed in croplands (53.0%) and lower values in forests (38.6%). Microbial necromass C was significantly increased by 9.5% after N addition, regardless of N forms, with greater stimulation observed for fungal (+ 11.2%) than bacterial (+ 4.5%) necromass C. This increase in microbial necromass C under elevated N was greater under longer experimental periods but showed little variation among different N application rates. The stimulation of soil microbial necromass C under elevated N was proportional to the change in soil organic C. Conclusions The stimulation of microbial residues after biomass turnover is an important pathway for the observed increase in soil organic C under N deposition across China’s terrestrial ecosystems.

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“…The particle size distribution could also affect water storage/movement and this was higher in the forest gully bottom where there was a lower sand content. The high-moisture conditions at this largely depositional position would also limit decomposition rates and simultaneously stabilize SOC [54]. Li et al (2019) [54] suggested that depositional topsoil SOC is prone to mineralization (in consequence more CO 2 is emitted) while SOC is stabilized at subsoil depths.…”

Section: Characteristics Of the Forest Gully Soilmentioning

confidence: 99%

Variations in Soil Properties and CO2 Emissions of a Temperate Forest Gully Soil along a Topographical Gradient

Walkiewicz

Bulak

Brzezińska

et al. 2021

Forests

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Although forest soils play an important role in the carbon cycle, the influence of topography has received little attention. Since the topographical gradient may affect CO2 emissions and C sequestration, the aims of the study were: (1) to identify the basic physicochemical and microbial parameters of the top, mid-slope, and bottom of a forest gully; (2) to carry out a quantitative assessment of CO2 emission from these soils incubated at different moisture conditions (9% and 12% v/v) and controlled temperature (25 °C); and (3) to evaluate the interdependence between the examined parameters. We analyzed the physicochemical (content of total N, organic C, pH, clay, silt, and sand) and microbial (enzymatic activity, basal respiration, and soil microbial biomass) parameters of the gully upper, mid-slope, and bottom soil. The Fourier Transformed Infrared spectroscopy (FTIR) method was used to measure CO2 emitted from soils. The position in the forest gully had a significant effect on all soil variables with the gully bottom having the highest pH, C, N concentration, microbial biomass, catalase activity, and CO2 emissions. The sand content decreased as follows: top > bottom > mid-slope and the upper area had significantly lower clay content. Dehydrogenase activity was the lowest in the mid-slope, probably due to the lower pH values. All samples showed higher CO2 emissions at higher moisture conditions, and this decreased as follows: bottom > top > mid-slope. There was a positive correlation between soil CO2 emissions and soil microbial biomass, pH, C, and N concentration, and a positive relationship with catalase activity, suggesting that the activity of aerobic microorganisms was the main driver of soil respiration. Whilst the general applicability of these results to other gully systems is uncertain, the identification of the slope-related movement of water and inorganic/organic materials as a significant driver of location-dependent differences in soil respiration, may result in some commonality in the changes observed across different gully systems.

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Soil erosion affects variations of soil organic carbon and soil respiration along a slope in Northeast China

Cited by 51 publications

References 46 publications

Vegetation Restoration Alleviated the Soil Surface Organic Carbon Redistribution in the Hillslope Scale on the Loess Plateau, China

Vegetation Restoration Alleviated the Soil Surface Organic Carbon Redistribution in the Hillslope Scale on the Loess Plateau, China

Increased microbial sequestration of soil organic carbon under nitrogen deposition over China’s terrestrial ecosystems

Variations in Soil Properties and CO2 Emissions of a Temperate Forest Gully Soil along a Topographical Gradient

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