European Journal of Soil Science最新文献

{"title":"Invasion by red imported fire ants depletes soil microarthropod communities in agricultural systems","authors":"Saichao Zhang,&nbsp;Zhihong Qiao,&nbsp;Haifeng Yao,&nbsp;Zhipeng Li,&nbsp;Qibao Yan,&nbsp;Anton Potapov,&nbsp;Xin Sun","doi":"10.1111/ejss.13556","DOIUrl":"https://doi.org/10.1111/ejss.13556","url":null,"abstract":"<p>Biological invasion is one of the major challenges to changing ecosystems worldwide. Red fire ants are a prime example of invasive soil animals. However, the impacts of their invasion on the native soil animal communities are still poorly understood. Here, we investigated how the biomass and diversity of soil microarthropods (incl., Collembola and Acari) vary between areas affected by red fire ants at different degrees (i.e., OA, occurrence area, 0–20 m from the nest; PCA, prevention and control area, 20–50 m; POA, potential occurrence area, 50–100 m). We also tested whether the potential effects of ant invasion on other animals are associated with changes in soil properties in the invaded areas. Our results showed a decline of 64% in species richness, 74% in density, and 72% in biomass of microarthropods in OA in comparison with POA. This reduction was mainly driven by the decrease of Acari, while no reduction in Collembola biomass was observed. Despite soil properties being significantly different between ant-impacted areas, structural equation models indicated that the direct association of invasion with microarthropod communities is stronger than the indirect association mediated by soil properties. Therefore, we consider that direct biological interaction is more likely the major mechanism behind the observed changes in microarthropod communities. The effects of red fire ants were different among taxonomic and functional groups, with litter-dwelling Collembola, Oribatida, and Mesostigmata (Acari) affected more negatively than soil-dwelling and surface-dwelling Collembola. Further, red fire ants affected the turnover component of beta-diversity (i.e., replacement of species) for both Collembola and Acari. However, the impact on the nestedness component, which is related to species local extinction and population decline, was only detected for Acari. Our study shows that red fire ant invasion is associated with the depletion of soil microarthropod community, and especially highlights that Acari are more vulnerable to this invasion compared to Collembola. The divergent response between different taxonomic and functional groups of microarthropods and the consequent shift in microarthropod communities may have important significance to soil ecological functioning in the impacted areas.</p>","PeriodicalId":12043,"journal":{"name":"European Journal of Soil Science","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142050507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of longitudinal profile shape on scour and flow resistance in rills","authors":"Alessio Nicosia,&nbsp;Vincenzo Palmeri,&nbsp;Costanza Di Stefano,&nbsp;Vincenzo Pampalone,&nbsp;Gaetano Guida,&nbsp;Vito Ferro","doi":"10.1111/ejss.13561","DOIUrl":"https://doi.org/10.1111/ejss.13561","url":null,"abstract":"<p>The literature regarding how rill longitudinal profile (concave and convex) affects soil loss and flow resistance is still lacking. The only analysis available in the literature for rills is limited by the fact that measurements were performed for a unique mean slope value <i>s</i>_p (18%). In this article, further rill measurements were conducted on a plot with <i>s</i>_p = 15% and complex profile shapes and were used to widen the knowledge about the influence of longitudinal profile shape on rill scour, eroded volume, and flow resistance. The findings highlighted that the concave profile has a homogeneous spatial distribution of moderate scours, whereas the scours in the convex one are deeper and more confined, but they are not placed after the slope change as found for <i>s</i>_p = 18%. The mean scour depth, which accounts for the discharge and profile shape effects, is not (concave) or is weakly (convex) related to the flow discharge. The concave profile determined a reduction of approximately 57% of the total eroded volume when compared with the convex profile shape, confirming that a concave hillslope limits erosive phenomena. Finally, the flow resistance equation guaranteed a precise estimation of the Darcy–Weisbach friction factor.</p>","PeriodicalId":12043,"journal":{"name":"European Journal of Soil Science","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ejss.13561","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142041571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial distribution of Azospirillum brasilense in 2D flow cell: Effect of irrigation and inoculation regimes","authors":"Fengxian Chen,&nbsp;Zeev Ronen,&nbsp;Gilboa Arye","doi":"10.1111/ejss.13552","DOIUrl":"https://doi.org/10.1111/ejss.13552","url":null,"abstract":"<p>Recent advances in the use of plant growth-promoting bacteria (PGPB) have highlighted their potential to significantly enhance crop yield and plant health. In desert areas with sandy soil, employing drip irrigation systems to inoculate PGPB serves as an efficient method that saves both time and labour. This study examined the absorption, transport and spatial distribution of two strains of <i>Azospirillum brasilense</i> (Sp7 and Cd) under two-dimension (2D) unsaturated transient water flow. We used sand as a substitute for sandy soil and evaluated bacterial surface characteristics, adsorption isotherms and transport under different irrigation and inoculation regimes. The research determined that, owing to its smaller size and lower adsorption, <i>A. brasilense</i> Cd exhibited enhanced mobility and occupied an inoculated area 33% larger than that of <i>A. brasilense</i> Sp7. Moreover, subsurface drip irrigation (SSDI) exhibited a 29% higher inoculation area than surface drip irrigation (SDI). The sequence of introducing PGPB suspension and irrigation water impacted the distribution, particularly for <i>A. brasilense</i> Sp7. The attachment/detachment numerical model adequately described the 2D bacterial distribution (<i>R</i>² ranged from 0.75 to 0.99), providing a useful tool for predicting bacterial distribution in soils and optimizing agricultural practices to enhance crop productivity. Overall, smaller bacteria, SSDI inoculation and inoculation before irrigation could enhance the extent of inoculation. This study provides novel insights into optimizing PGPB inoculation strategies in agricultural settings, highlighting the importance of considering bacterial physical properties, irrigation techniques and inoculation sequences to improve PGPB distribution within the rhizosphere.</p>","PeriodicalId":12043,"journal":{"name":"European Journal of Soil Science","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ejss.13552","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142041728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of nitrapyrin on urea-based fertilizers in a Mediterranean calcareous soil: Nitrogen and microbial dynamics","authors":"Georgios Giannopoulos,&nbsp;Lars Elsgaard,&nbsp;Vasileios A. Tzanakakis,&nbsp;Rima B. Franklin,&nbsp;Bonnie L. Brown,&nbsp;Georgios Zanakis,&nbsp;Nikolaos Monokrousos,&nbsp;Ioannis Anastopoulos,&nbsp;Murad Awad,&nbsp;Ioannis Ipsilantis,&nbsp;Nikolaos Barbayiannis,&nbsp;Alexios N. Polidoros","doi":"10.1111/ejss.13553","DOIUrl":"https://doi.org/10.1111/ejss.13553","url":null,"abstract":"<p>Nitrification inhibitors, such as nitrapyrin (NI), are increasingly co-applied with nitrogen (N) fertilizers as part of sustainable agricultural practice. Several studies in temperate regions have documented the effectiveness of NI in retaining soil ammonium (NH₄⁺), minimizing N loss and increasing crop yields. However, less is known about the effects of NI in Mediterranean regions, where agricultural production is challenging and requires intensive irrigation and fertilization. We investigated the short-term impact of the nitrification inhibitor nitrapyrin (2-chloro-6-(trichloromethyl)pyridine) in a two-factor mesocosm experiment, using a typical Mediterranean soil, where NI was co-applied with a selection of urea-based fertilizers: urea (U), U with urease inhibitors (U + UI), methylene urea (MU) and zeolite-coated urea (ZU). NI co-applied with urea fertilizers resulted in higher availability of soil NH₄⁺ and a concurrent increase in NH₃ volatilization. Net cumulative soil NH₄⁺ availability was 1.5–3.3 fold greater when NI was applied. Concurrently, net cumulative nitrate (NO₃⁻) and nitrite (NO₂⁻) availability was reduced by 10%–60%; this was found for all the tested fertilizer types except MU fertilizer, where the net cumulative soil NO₃⁻ and NO₂⁻ doubled. Nitrous oxide (N₂O) emissions from urea fertilization were reduced by 40% with UI, 50% with NI and 66% with NI + UI. Interestingly, after 28 d, the composition of soil microbial communities was distinctly different, due to NI application. Specifically, NI application dramatically reduced the abundance of ammonia-oxidizing and denitrifying bacterial functional groups. NI was effective in reducing N₂O emissions in this calcareous soil; however, NH₃ emissions were remarkably enhanced. These findings have important implications for the large-scale adoption of inhibitor technologies in Mediterranean agroecosystems and for the reduction of greenhouse gas emissions.</p>","PeriodicalId":12043,"journal":{"name":"European Journal of Soil Science","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ejss.13553","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142013623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Substantial contribution of inorganic carbon sources to CO2 emissions in calcareous vineyard soils in Germany","authors":"Muhammad Islam,&nbsp;Ralf Wehrle,&nbsp;Stefan Pätzold,&nbsp;Nicolas Brüggemann","doi":"10.1111/ejss.13551","DOIUrl":"10.1111/ejss.13551","url":null,"abstract":"<p>In light of climate change and increasing global temperatures, it is important to equally prioritize the study of inorganic carbon dynamics in calcareous soils within temperate ecosystems, as has been done for arid or semiarid environments. A significant area of vineyards in Germany is established on calcareous soils. However, the potential influence of inorganic carbon on CO₂ emissions in these vineyards has not been sufficiently explored when evaluating the carbon footprint of management practices in relation to carbon storage. Therefore, we aimed to differentiate between organic and inorganic sources of CO₂ emissions from six vineyard soils located in the southwest of Germany that had previously received organic soil amendments (OA). Inorganic carbon content varied between 8 and 55 g kg⁻¹ across different sites, with variations observed in the inorganic-to-organic carbon ratio. Soil samples were incubated under standard laboratory conditions for 48 h, and the source of emitted CO₂ was determined using a two-end-member mixing model. The contribution of inorganic carbon to CO₂ emissions was influenced by the quantity of inorganic carbon, with an increase in contribution with increasing inorganic-to-organic carbon ratio. On average, abiotic sources accounted for 5% to 40% of the emitted CO₂ at the different sites, with one site showing no significant contribution of inorganic carbon. CO₂ production from inorganic carbon was higher in the subsoil compared with the topsoil, likely related to the higher content of inorganic carbon in the subsoil. Notably, there was no discernible influence of OA on carbonate dissolution. This study emphasizes the significance of considering abiotic sources of CO₂ emissions in addition to soil respiration in calcareous soils and highlights the need for further investigation to apply these findings at the field scale.</p>","PeriodicalId":12043,"journal":{"name":"European Journal of Soil Science","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ejss.13551","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142007447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Factors driving microbial biomass and necromass relationships display ecosystem-dependent responses","authors":"Kaikai Min,&nbsp;Laurel Lynch,&nbsp;Tiantian Zheng,&nbsp;Fusheng Chen,&nbsp;Chao Liang","doi":"10.1111/ejss.13555","DOIUrl":"https://doi.org/10.1111/ejss.13555","url":null,"abstract":"<p>Microorganisms help govern soil organic carbon (SOC) turnover and accumulation. Whilst it is increasingly clear that microbial necromass is a precursor of SOC formation, the relationship between living microorganisms, necromass turnover and SOC persistence remains elusive. In this study, we used phospholipid fatty acids and amino sugars to quantify living versus dead microbial carbon concentrations and evaluated the utility of each pool as an indicator of SOC persistence across a range of climates (low-, mid- and high-latitude sites) and ecotypes (old-growth forests vs. managed croplands). We found that microbial necromass was higher in forest than in cropland soils and was positively correlated with soil moisture, SOC and total nitrogen (TN). However, the flow of microbial biomass into necromass and SOC was decoupled in forest sites, likely because the high soil SOC/TN ratio accelerated necromass turnover and recycling by living microorganisms. In contrast, microbial biomass and necromass pools were tightly coupled in croplands and influenced by multiple environmental and biological factors (e.g., necromass concentrations exhibited greater variability in soils with more bacteria than fungi, and those with more gram-positive than gram-negative taxa). Contrasting our expectations, the proportion of microbially-derived necromass in SOC was decoupled from soil properties and microbial biomass in both ecotypes. Whilst SOC and pH appear to be universal drivers of necromass cycling, feedbacks between living biomass, necromass and SOC are shaped by local factors. Our results contribute to ecological theory by highlighting the environmental and biological factors underpinning SOC formation and turnover that can be used to inform land-management practices that optimize below-ground carbon sequestration.</p>","PeriodicalId":12043,"journal":{"name":"European Journal of Soil Science","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141991610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An analytical solution for vertical infiltration in homogeneous bounded profiles","authors":"I. Argyrokastritis,&nbsp;K. Kalimeris,&nbsp;L. Mindrinos","doi":"10.1111/ejss.13547","DOIUrl":"https://doi.org/10.1111/ejss.13547","url":null,"abstract":"<p>In this study, we derive an analytical solution to address the problem of vertical infiltration within 1D homogeneous bounded profiles. Initially, we consider the Richards equation together with Dirichlet boundary conditions. We assume constant diffusivity and linear dependence between the conductivity and the water content, resulting to a linear partial differential equation of diffusion type. To solve the simplified initial boundary value problem over a finite interval, we apply the unified transform, commonly known as the Fokas method. Through this methodology, we obtain an integral representation of the solution that can be efficiently and directly computed numerically, yielding a convergent scheme. We examine various cases, and we compare our solution with well-known approximate solutions. This work can be seen as a first step to derive analytical solutions for the far more difficult and complex problem of modelling water flow in heterogeneous layered soils.</p>","PeriodicalId":12043,"journal":{"name":"European Journal of Soil Science","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ejss.13547","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141980486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Land use and soil property effects on aggregate stability assessed by three different slaking methods","authors":"Christopher Poeplau,&nbsp;Thaddäus Riefling,&nbsp;Marcus Schiedung,&nbsp;Rüdiger Anlauf","doi":"10.1111/ejss.13549","DOIUrl":"10.1111/ejss.13549","url":null,"abstract":"<p>Aggregate stability is an important structural feature of soils, since it controls surface erosion, water infiltration, plant growth and carbon stabilisation. As such, it might be considered as a potential descriptor of soil health in repeated national to continental-scale soil monitoring programmes, which is, as of now, rarely the case. This might be related to (i) the conception that it can be predicted reasonably well by standard soil parameters, and (ii) the lack of a high-throughput method. Here, we used a paired plot approach with 50 cropland and adjacent grassland field margin plots to specifically test (i) if measuring aggregate stability is added value over its mere estimation based on soil properties, and (ii) if a high throughput image recognition method can bear comparison with more classical methods. We evaluated the mean weight diameter (MWD), water stable aggregates (WSA) using classical setups, as well as the slaking index (SI) via imagine recognition. Methods were compared regarding their sensitivity to considered parameters as well as their reproducibility. Soil organic carbon (SOC) as well as aggregate stability were significantly higher under grassland than under cropland soils. Remarkably, the specific design of the study could reveal that the difference in aggregate stability between land use types was not solely affected by SOC content and quality, derived from mid-infrared spectroscopy. Quality and spatial distribution of organic matter inputs, absence of disturbance, as well as biotic parameters might all be relevant factors. Nevertheless, an important finding was that SOC quality had a higher explanatory power than SOC content alone for two out of three methods. Overall, the MWD was the most sensitive to the assessed drivers and together with the WSA the most reproducible method, with coefficients of variation below 6%. By contrast, those of the SI were as high as 192%, which hampered the detection of clear patterns along the soil property gradient and between land use types. For high-quality scientific applications, 2D image recognition cannot be recommended. Instead, we recommend the use of the MWD or WSA method for scientific purposes with a low number of technical replicates in larger-scale assessments to further unravel the importance of aggregate stability for healthy soils, and to better determine the underlying factors.</p>","PeriodicalId":12043,"journal":{"name":"European Journal of Soil Science","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ejss.13549","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141909080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reduced tillage intensity does not increase arbuscular mycorrhizal fungal diversity in European long-term experiments","authors":"Tanel Vahter,&nbsp;Astrid R. Taylor,&nbsp;Blanca B. Landa,&nbsp;Deborah Linsler,&nbsp;Engracia Maria Madejon Rodriguez,&nbsp;Francisco Giron Moreno,&nbsp;Guénola Pérès,&nbsp;Ilka Engell,&nbsp;Inga Hiiesalu,&nbsp;Jan Bengtsson,&nbsp;Jane Oja,&nbsp;Kaisa A. Torppa,&nbsp;Luis F. Arias-Giraldo,&nbsp;Gema Guzmán,&nbsp;Martin Potthoff,&nbsp;Martti Vasar,&nbsp;Mignon Sandor,&nbsp;Siim-Kaarel Sepp,&nbsp;Vlad Stoian,&nbsp;Maarja Öpik","doi":"10.1111/ejss.13546","DOIUrl":"10.1111/ejss.13546","url":null,"abstract":"<p>Mechanical soil disturbance is one among the key factors influencing soil biodiversity in agriculture. Although many soil organisms are sensitive to soil disturbance, fungi could be highly impacted due to their sessile lifestyle, relatively slow growth and filamentous body structure. Arbuscular mycorrhizal (AM) fungi are of particular interest in arable lands, providing crop plants with numerous vital services such as nutrient acquisition and protection against abiotic and biotic stressors. Considering this, tillage practices that aim to reduce soil disturbance are often seen as a fungal-friendly alternative to conventional inversion tillage. Although local studies exist on the impacts of minimal tillage practices on AM fungi, the universality of this approach has been debated. Our objective was to assess the effects of reduced tillage intensity on AM fungi in comparison with conventional tillage. Using high-throughput sequencing techniques in long-term field experiments in five European countries, we show that the effects of reduced tillage intensity may not necessarily be positive on soil AM fungal diversity. Plots which were tilled using reduced tillage techniques had lower AM fungal richness in three countries, whereas in one of them, no significant differences were found. We also observed a shift in AM fungal communities where prevalence of taxa preferring root colonisation rather than soil exploration increased under reduced tillage regimes. Here, we argue that more detailed and long-term studies are needed to understand the factors that could make the reduction of soil disturbance more beneficial to AM fungi if agricultural sustainability goals are to be met.</p>","PeriodicalId":12043,"journal":{"name":"European Journal of Soil Science","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ejss.13546","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141904672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Specific ion effects of H+-base cation coupling on permanently charged soil aggregation","authors":"Dian Liu,&nbsp;Xinmin Liu,&nbsp;Rui Tian,&nbsp;Yekun Zhang,&nbsp;Bo Feng,&nbsp;Xiaomin Guo,&nbsp;Hang Li","doi":"10.1111/ejss.13548","DOIUrl":"10.1111/ejss.13548","url":null,"abstract":"<p>The accumulation of excessive H⁺ can cause soil acidification and then affect the aggregation and dispersion of soil particles through changes in pH as well as electrolyte type and concentration. In this study, dynamic light scattering (DLS) technology was employed to investigate the aggregation kinetics of soil particles in several base cation solutions at different pHs. The results showed that, (1) specific ion effects of base cations were observed in aggregation rates, critical coagulation concentrations (CCCs) and activation energies for soil particle aggregation at different pHs; (2) H⁺ enhanced the aggregation rate, but reduced the CCC values and activation energies of the base cations, and then greatly promoted soil particle aggregation; (3) H⁺ strongly decreased specific ion effects of base cations on the aggregation rates, CCCs and activation energies for soil particle aggregation. The analyses of those differences related to soil aggregation kinetics in different base cation solutions at different pHs revealed that, the lower the pH, the weaker the electric field strength, and therefore the weaker the polarization of base cations and surface O-atoms would be. Moreover, H⁺ reduced the charge density for soil particle aggregation, which was the main source for decreasing the electrostatic repulsive energy for soil particle aggregation at different pHs. The study improves our understanding of soil acidification effects on soil particle aggregation and aggregate stability.</p>","PeriodicalId":12043,"journal":{"name":"European Journal of Soil Science","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141904653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}