Erosion-induced carbon losses and CO2 emissions from Loess and Black soil in China

Gao, Xin; Hu, Yaxian; Sun, Quan; Du, Long; Duan, Pengfei; Yao, Lunguang; Guo, Shengli

doi:10.1016/j.catena.2018.08.001

Cited by 35 publications

(10 citation statements)

References 63 publications

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“…The first is enhancing the observations of soil erosion processes at different scales, which will be helpful to improve the model accuracy of soil erosion at each process (Martinez et al, 2017). The second is paying more attention to the soil-atmosphere intersections, especially the greenhouse gas emission during the process of soil erosion (Bradford et al, 2016;Gao et al, 2018). The third is projecting the vegetation changes, soil erosion export and nutrient loss in the changing climate conditions (Pastor et al, 2019), which has a significant to biogeochemical cycles and will provide references to the policy-making for local government.…”

Section: Challenges and Future Directionsmentioning

confidence: 99%

Quantifying the Effects of Vegetation Restorations on the Soil Erosion Export and Nutrient Loss on the Loess Plateau

et al. 2020

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The transport of eroded soil to rivers changes the nutrient cycles of river ecosystems and has significant impacts on the regional eco-environment and human health. The Loess Plateau, a leading vegetation restoration region in China and the world, has experienced severe soil erosion and nutrient loss, however, the extent to which vegetation restoration prevents soil erosion export (to rivers) and it caused nutrient loss is unknown. To evaluate the effects of the first stage of the Grain for Green Project (GFGP) on the Loess Plateau (started in 1999 and ended in 2013), we analyzed the vegetation change trends and quantified the effects of GFGP on soil erosion export (to rivers) and it caused nutrient loss by considering soil erosion processes. The results were as follows: (1) in the first half of study period (from 1982 to 1998), the vegetation cover changed little, but after the implementation of the first stage of the GFGP (from 1999 to 2013), the vegetation cover of 75.0% of the study area showed a significant increase; (2) The proportion of eroded areas decreased from 41.8 to 26.7% as a result of the GFGP, and the erosion intensity lessened in most regions; the implementation significantly reduce the soil nutrient loss; (3) at the county level, soil erosion export could be avoided significantly by the increasing of vegetation greenness in the study area (R = −0.49). These results illustrate the relationships among changes in vegetation cover, soil erosion and nutrient export, which could provide a reference for local government for making ecology-relative policies.

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Section: Challenges and Future Directionsmentioning

confidence: 99%

Quantifying the Effects of Vegetation Restorations on the Soil Erosion Export and Nutrient Loss on the Loess Plateau

et al. 2020

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“…Our experimental results showed that black soil resulted in a greater measurement error than the other soil (Figures 3-8), which may indicate a more important soil characteristic affecting sediment concentration measurement accuracy, that is, soil aggregate water stability, other than soil texture. There are richer organic matters in black soil [33] and its aggregate is more stable [34] as compared with other three soils, so fast sediment deposition may easily occurr even during the stirring process. Therefore, to develop a specific fitted equation for different soils is needed to accurately correct the measurement error of traditional stirring-sampling method.…”

Section: Effects Of Soil Typementioning

confidence: 99%

Measurement errors on sediment concentration from traditional runoff collection tanks and its correction possibility

Huang

Zhao

et al. 2019

International Journal of Agricultural and Biological Engineering

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Runoff plots are widely used worldwide to monitor water and soil losses. Sediment concentration in runoff collection tank is measured by stirring-sampling procedure, but this method may produce high measurement error due to the uneven mixing of collected sediments with water and soil particle deposition. This study aimed to identify the relationship between actual and measured sediment concentrations, so as to estimate the systematic error of sediment concentration measurement from runoff collection tank by traditional stirring-sampling procedure and the possibility to eliminate it. Four major soils including black soil, silt loess, clay loess, and purple soil in China were used to determine the correlation between the measured and designed sediment concentrations in laboratory.

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“…Erosion-induced losses of soil C and the attendant CO 2 emissions from a loess and black soil in China were studied by Gao et al [18] for three slope gradients (5 • , 15 • and 25 • ) using a rainfall simulator. On average, SOC loss from loess soil was about 1.8 times that from black soil although the SOC concentration in original black soil was 56% higher than that in the loess soil.…”

Section: Slopementioning

confidence: 99%

Fate of Soil Carbon Transported by Erosional Processes

Lal

2021

Applied Sciences

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The accelerated process of soil erosion by water and wind, responsible for transport and redistribution of a large amount of carbon-enriched sediments, has a strong impact on the global carbon budget. The breakdown of aggregates by erosivity of water (raindrop, runoff) and wind weakens the stability of soil C (organic and inorganic) and aggravates its vulnerability to degradation processes, which lead to the emission of greenhouse gases (GHGs) including CO2, CH4, and N2O, depending on the hydrothermal regimes. Nonetheless, a part of the eroded soil C may be buried, reaggregated and protected against decomposition. In coastal steep lands, (e.g., Taiwan, New Zealand) with a short distance to burial of sediments in the ocean, erosion may be a sink of C. In large watersheds (i.e., Amazon, Mississippi, Nile, Ganges, Indus, etc.) with a long distance to the ocean, however, most of the C being transported is prone to mineralization/decomposition during the transit period and is a source of GHGs (CO2, CH4, N2O). Land use, soil management and cropping systems must be prudently chosen to prevent erosion by both hydric and aeolian processes. The so-called plague of the soil, accelerated erosion by water and wind, must be effectively curtailed.

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Erosion-induced carbon losses and CO2 emissions from Loess and Black soil in China

Cited by 35 publications

References 63 publications

Quantifying the Effects of Vegetation Restorations on the Soil Erosion Export and Nutrient Loss on the Loess Plateau

Quantifying the Effects of Vegetation Restorations on the Soil Erosion Export and Nutrient Loss on the Loess Plateau

Measurement errors on sediment concentration from traditional runoff collection tanks and its correction possibility

Fate of Soil Carbon Transported by Erosional Processes

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