Characteristics and controls of solute transport under different conditions of soil texture and vegetation type in the water–wind erosion crisscross region of China’s Loess Plateau

Pei, Yanwu; Huang, Laiming; Li, Danfeng; Shao, Mingan

doi:10.1016/j.chemosphere.2021.129651

Cited by 20 publications

(20 citation statements)

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“…Different vegetation types with diverse root distribution patterns will result in variational pore characteristics and soil structure. 31 The order of soil porosity under different plants coverage is arbor land > shrub forest > grassland. 32 Arbor tree-covered soils have greater porosity, confirming that different plant types also have an effect on the structure of the soil.…”

Section: Resultsmentioning

confidence: 99%

“…The external evaporation capacity (temperature, wind speed, and light) and soil water transport capacity (soil texture, structure, water content, and vegetation coverage) are the main influential factors. 50 Zhang 51 pointed out that the phreatic evaporate limitation of burial depth ranged from 2.38 to 5.16 m from sandy gravel to loam. According to the observation data of groundwater evaporation in the arid area of Northwest China, the maximum buried depth of table water aquifer is less than 4.5 m. 52 From experimental results, the 6.5–10 m deep underground soil has exceeded the ultimate depth of phreatic evaporation, which has no direct impact on the physical–chemical properties of the surface soil.…”

Section: Resultsmentioning

confidence: 99%

“…In the northwest of the CMII with sparse vegetation, the SWC value is also lower. Different vegetation types with diverse root distribution patterns will result in variational pore characteristics and soil structure . The order of soil porosity under different plants coverage is arbor land > shrub forest > grassland .…”

Section: Resultsmentioning

confidence: 99%

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Effects of Underground Coal Mining on Soil Spatial Water Content Distribution and Plant Growth Type in Northwest China

Zhang

Yang

et al. 2022

ACS Omega

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The impact of coal mining subsidence on surface ecology involves the influence of several ecological elements such as water, soil, and vegetation, which is systematic and complex. Given the unclear understanding of the synergistic change patterns of the water–soil–vegetation ecological elements in the influence of coal mining in the west, this paper investigates the impact of coal mining on the surface ecology, especially the distribution of soil water content (SWC). In 2020, this study collected 3000 soil samples from 60 sampling points (at depth of 0–10 m) and tested the SWC. All samples come from three different temporal and spatial areas of coal mining subsidence in the desert mining area of Northwest China where soil types are mainly aridisols. At the same time, the interactions among deep SWC and surface soil physical and chemical properties, surface SWC and soil fertility, and pH were analyzed. The spatial variability of soil moisture is reflected by kriging interpolation, and SWC values at different depths are predicted as a basis for monitoring the environmental impact of different coal mining subsidence years. The research has shown that the ground subsidence leads to a decrease in SWC value and changes in surface soil pH, physical and chemical properties, and covering vegetation, which have occurred from the beginning of coal mining. The impact of coal mining on the SWC of the unsaturated zone is mainly at the depth of 0–6 m, where SWC is not directly related to the nutrient content of the surface soil. The overall settlement of the ground will stir up simultaneous decline in the quality of deep SWC and topsoil. The findings of this investigation suggest that changes in the soil structure caused by coal mining subsidence are the key factor in SWC loss. Timely monitoring and repairing 0–6 m ground fissures, as well as selecting shrubs on the surface is the best choice for the restoration of the ecological environment and prevention of soil erosion in this area.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Effects of Underground Coal Mining on Soil Spatial Water Content Distribution and Plant Growth Type in Northwest China

Zhang

Yang

et al. 2022

ACS Omega

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“…The xed-aeolian sandy soil in the watershed is classi ed as Aridic Arenosols according to the World Reference Base for Soil Resources (FAO, 2006) or Sandic Primosols according to the Chinese Soil Taxonomy (Cooperative Research Group on Chinese Soil Taxonomy, 2001). The grain size distribution has a high percentage of sand (> 95%) and a low percentage of silt (< 5%) for the clay-free sandy soil (Pei et al, 2021a). The groundwater level in the watershed is shallow, with the highest water table sitting less than 1.0 m below land surface (Pei et al, 2021b) and providing a potential source of water for the restored vegetation.…”

Section: Study Areamentioning

confidence: 99%

Water uptake patterns differ markedly among different sand-fixing plants in Mu Us Sandy Land in Northwest China

Pei¹,

Huang

Shao³

et al. 2022

Preprint

Self Cite

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Aim This study aimed to investigate the seasonal variations and controls of water uptake patterns of different sand-fixing plants in water-limited desert ecosystem. Methods δ2H and δ18O in precipitation water, soil water, groundwater and xylem water were obtained to determine the seasonal changes in water uptake by three representative plant species (P. sylvestris, A. pcdunculata and S. psammophila) in the Mu Us Sandy Land in Northwest China. Results Annually, P. sylvestris, A. pcdunculata and S. psammophila respectively derived of their water from the deep (59.2% moist layer and groundwater), intermediate (57.4% stable and moist layers) and shallow (54.4% active and stable layers) water sources. Seasonally, the three plant species absorbed more than 60% of their water from moist layer and groundwater in the early dry season (June) and then switched over to water sources in active and stable layers (50.1–62.5%) in the rainy season (July–September). From October to November (late dry season), P. sylvestris (54.5–66.2%) and A. pcdunculata (52.9–63.6%) mainly used water from stable and moist layers, while S. psammophila (52.6–70.7%) still predominantly extracted its water from active and stable layers. Conclusions Variations in soil water profile induced by seasonal fluctuations in precipitation and groundwater level and then differences in plant root distribution and water requirement were the main factors affecting seasonal patterns of water use by the three plant species. By analyzing the sources and controls of plant water uptake, this study opened a new door of research on vegetation restoration and water management in water-limited desert regions.

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“…However, large-scale vegetation protection is restricted by soil structure and fertility, rainfall, the survival rate of seeds, and the growth of roots [ 21 , 22 ]. Therefore, reasonable design and development of eco-friendly polymer materials that combines physical, chemical, and biological protection properties is a key field in effective, green, and long-term loess slope stability and water-soil erosion control [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

An Eco-Friendly Polymer Composite Fertilizer for Soil Fixation, Slope Stability, and Erosion Control

Dai

et al. 2022

Polymers

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In the Loess Plateau region, the poor structure and properties of loess slopes will cause many types of geological disasters such as landslides, mudflow, land collapse, soil erosion, and ground cracking. In this paper, an eco-friendly polymer composite fertilizer (PCF) based on corn straw wastes (CS) and geopolymer synthesized from loess was studied. The characterization by FT-IR of the PCF confirmed that graft copolymer is formed, while morphological analysis by scanning electron microscopy and energy dispersive spectroscopy showed that geopolymer and urea were embedded in the polymer porous network. The effects of PCF contents on the compressive strength of loess were investigated. The PCF was characterized in terms of surface curing test, temperature and freeze-thaw aging property, water and wind erosion resistance, and remediation soil acidity and alkalinity property, which indicates that PCF can improve loess slope fixation and stability by physical and chemical effects. Moreover, the loess slope planting experiment showed that PCF can significantly increase the germination rate of vegetation from 31% to 68% and promote the survival rate of slope vegetation from 45.2% to 67.7% to enhance biological protection for loess slopes. The PCF meets the demands of building and roadbed slope protection and water-soil conservation in arid and semi-arid regions, which opens a new application field for multifunctional polymer composite fertilizers with low cost and environmental remediation.

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Characteristics and controls of solute transport under different conditions of soil texture and vegetation type in the water–wind erosion crisscross region of China’s Loess Plateau

Cited by 20 publications

References 46 publications

Effects of Underground Coal Mining on Soil Spatial Water Content Distribution and Plant Growth Type in Northwest China

Effects of Underground Coal Mining on Soil Spatial Water Content Distribution and Plant Growth Type in Northwest China

Water uptake patterns differ markedly among different sand-fixing plants in Mu Us Sandy Land in Northwest China

An Eco-Friendly Polymer Composite Fertilizer for Soil Fixation, Slope Stability, and Erosion Control

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