Soil最新文献

{"title":"A quantitative assessment of the behavior of metallic elements in urban soils exposed to industrial dusts near Dunkerque (northern France)","authors":"Marine Casetta, Sylvie Philippe, Lucie Courcot, David Dumoulin, Gabriel Billon, François Baudin, Françoise Henry, Michaël Hermoso, Jacinthe Caillaud","doi":"10.5194/soil-11-467-2025","DOIUrl":"https://doi.org/10.5194/soil-11-467-2025","url":null,"abstract":"Abstract. In urban and industrialized areas, soil contamination and degradation caused by industrial dust deposition may pose significant health and environmental risks. Generally, the mobility and thus bioavailability of potentially toxic elements (PTEs) are key factors in these issues. In the Dunkerque agglomeration, one of the most industrialized regions in France, the soils are periodically exposed to metallurgical dust fallout, rich in PTEs. However, no study has reported on the behavior of these PTEs once integrated into the soils. The aim of this study is therefore to assess the fate of PTEs in the urban soils of Dunkerque in terms of vertical migration and potential bioavailability. Four soil short cores were collected in the city of Gravelines (Dunkerque agglomeration) along a gradient from industrial emitters to deposition sites. Each soil core was cut into discrete 1 cm sections for PTE concentration analyses (ICP-AES/MS). Single HCl extractions were performed to evaluate PTE mobility in soils and their behavior according to the current soil parameters. For this purpose, key soil properties were identified, including grain-size distribution, mineralogy, pH, cation exchange capacity (CEC), TOC (total organic carbon), calcium carbonates and water contents in addition to the soil chemical composition (XRF, ICP-AES/MS). The studied soils revealed globally low absorbent capacities for pollutants (CEC averaging 5.3meq/100g), partially counterbalanced by the buffering effect of calcium carbonates (contents ranging from 8 %–30 %). Near the industrial emitters, minor (1<EF<3) to moderately severe (5<EF<10) enrichment factors (EFs) were highlighted for industrial PTE (Cr, Ni, Mo, Mn, Cd and Zn) in the top 3 cm of soils near the industrial emitters. The contamination profiles of these soils are assigned to atmospheric inputs of metallurgical dust. Using a relatively strong leaching reagent (1 M HCl), we estimated a low vertical mobility for Cr, Ni and Mo (average leached ratios<25 %) in soils, suggesting their association with refractory phases (natural or anthropogenic). In contrast, Mn, Cd and Zn, which are related to industrial and/or urban sources, present a higher mobility (average leached ratios>60 % for Mn and Cd and about 44 % for Zn). Our study points out the stability of industrial PTEs in soils under the current physicochemical conditions (calcareous soils with a slightly basic pH of 7.8). In this context, the monitoring of industrial PTEs in these urban soils is highly recommended, considering (1) the presence of allotment gardens in the vicinity of emitters and (2) the potential evolution of soil conditions due to increasing flood events.","PeriodicalId":48610,"journal":{"name":"Soil","volume":"4 1","pages":"467-488"},"PeriodicalIF":6.8,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144565904","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":"Soil health approaches to assess the impacts of no-tillage with agricultural terraces in southern Brazil","authors":"Ariane Lentice de Paula, Luis Miguel Schiebelbein, Regiane Kazmierczak Becker, Eduardo Augusto Agnellos Barbosa, Fabrício Tondello Barbosa, Carolina Weigert Galvão, Rafael Mazer Etto, Heverton Fernando Melo, Adriel Ferreira da Fonseca, Neyde Fabiola Balarezo Giarola","doi":"10.5194/egusphere-2025-2583","DOIUrl":"https://doi.org/10.5194/egusphere-2025-2583","url":null,"abstract":"<strong>Abstract.</strong> Soil health assessment depends on the appropriate selection of indicators and robust, sensitive methods for its determination. In this study, four integrative approaches were evaluated to assess the impacts of no-till with and without agricultural terraces on soil health in Southern Brazil. The different methods used were: (1) Principal Component Analysis (PCA); (2) expert opinion (EO); (2) FERTBIO; and (4) Soil Management Assessment Framework (SMAF). All approaches followed four steps: (i) selection of indicators; (ii) interpretation of indicators; (iii) integration of indicators; and (iv) calculation of soil health indices. The methods varied in the steps of indicator selection, interpretation, and the method of indicator integration. The indicators used included physical (bulk density, total porosity, soil penetration resistance, and water retention capacity), chemical (pH, calcium, phosphorus, potassium, organic matter, CEC, and base saturation), and biological indicators (microbial biomass carbon, β-glucosidase, and arylsulfatase). Crop yield was evaluated for maize (2019/20 and 2021/22 harvests), wheat (2021 harvest), and soybean (2020/21 harvest). Descriptive statistics, median comparisons, principal component analysis and spearman correlation analysis were applied for the analysis of results. The results showed that only the EO and FERTBIO approaches were sensitive enough to detect differences in soil health between management systems, indicating that no-till with terraces had better soil health. Biological indicators were more sensitive in differentiating treatments, showing a rapid response in the short term. Maize (2019/20 harvest) and wheat (2021 harvest) yields were higher under the no-till with terraces treatment. Over time, yield showed a stronger relationship with soil health. The results highlight the importance of selecting appropriate indicators for soil health assessment and reinforce the benefits of agricultural terracing for the sustainability of production systems.","PeriodicalId":48610,"journal":{"name":"Soil","volume":"16 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144533251","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":"Digging Deeper: Assessing Soil Quality in a Diversity of Conservation Agriculture Practices","authors":"Manon S. Ferdinand, Brieuc F. Hardy, Philippe V. Baret","doi":"10.5194/egusphere-2025-2700","DOIUrl":"https://doi.org/10.5194/egusphere-2025-2700","url":null,"abstract":"<strong>Abstract.</strong> Conservation Agriculture (CA) aims to enhance soil quality through three main principles: minimizing mechanical soil disturbance, maximizing soil organic cover, and diversifying crop species. However, the diversity of practices within CA makes the effect on soil quality hardly predictable. In this study, an evaluation of soil quality in CA fields across Wallonia (Belgium) was conducted for four distinct CA-types. Three soil quality indicators were examined: the soil structural stability, the soil organic carbon:clay ratio (SOC:Clay), and the labile carbon fraction (POXC). Results revealed significant variations among CA-types. The CA-type characterized by substantial temporary grassland and tillage-extensive crops (e.g., cereals, meslin, rape, flax) in the crop sequence had the highest soil structural stability and SOC:Clay ratio. In contrast, the CA-type characterized by strict non-inversion tillage practices and frequent tillage-intensive crops (e.g., sugar beet, chicory, potatoes, carrots) had the lowest scores for the three indicators. Temporary grassland in the crop sequence appeared as the most influential factor improving soil quality. These findings highlight the need to consider the diversity of CA-type when evaluating the agronomic and environmental performance of CA systems, whose response depends on local soil and climatic conditions, the crops cultivated, and the specific combination of practices implemented.","PeriodicalId":48610,"journal":{"name":"Soil","volume":"19 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144533252","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 in-situ methodology to separate the contribution of soil water content and salinity to EMI-based soil electrical conductivity","authors":"Dario Autovino, Antonio Coppola, Roberto De Mascellis, Mohammad Farzamian, Angelo Basile","doi":"10.5194/egusphere-2025-2696","DOIUrl":"https://doi.org/10.5194/egusphere-2025-2696","url":null,"abstract":"<strong>Abstract.</strong> Salt accumulation in the root zone limits agricultural productivity and can eventually lead to land abandonment. Therefore, monitoring the spatial distribution of soil water content and solution salinity is crucial for effective land and irrigation management. However, assessing soil water content and salinity at the field scale is often challenging due to the heterogeneity of soil properties. Electromagnetic induction (EMI) offers a fast, non-invasive, in situ geophysical method to map spatial variability in soil. EMI instruments measure the apparent soil electrical conductivity (EC_a), which reflects the integrated contribution of the bulk electrical conductivity (σ_b) of different soil layers. By inverting the measured EC_a, it is possible to obtain the distribution of the σ_b along the soil profile, which provides indirect information on soil salinity. However, in saline soils, σ_b is influenced by both water content (θ) and soil solution electrical conductivity (σ_w) (the salinity), making it difficult to independently quantify these two variables through a single, straightforward procedure. The objective of this study is to separate the respective contributions of θ and σ_w to σ_b, as obtained from the EMI inversion. To achieve this, EC_a was measured using a CMD-MiniExplorer instrument in two maize plots irrigated with saline and non-saline water, respectively, in an agricultural field in southern Italy. The dataset was then inverted in order to obtain the σ_b distribution. By employing a site-specific calibrated Rhoades linear model and assuming homogeneity between the two plots, the spatial distribution of θ and σ_w in the saline plot was successfully estimated. To validate the results, independent measurements of soil water content by Time Domain Reflectometry (TDR) and direct measurement of soil solution electrical conductivity, σ_w, were performed. The proposed procedure enables the estimation of θ and σ_w with high accuracy along the soil profile, except in the soil surface, where EMI reliability is limited. These findings demonstrate that the integration of EMI with a site-specific θ - σ_b - σ_w model is a reliable and efficient in-situ approach for mapping soil salinity and water content at field scale, offering valuable insights for optimizing agricultural irrigation management in systems using saline water.","PeriodicalId":48610,"journal":{"name":"Soil","volume":"21 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144478950","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":"Long-term pig manure application increases soil organic carbon through aggregate protection and Fe-carbon associations in a subtropical Red soil (Udic Ferralsols)","authors":"Hui Rong, Zhangliu Du, Weida Gao, Lixiao Ma, Xinhua Peng, Yuji Jiang, Demin Yan, Hu Zhou","doi":"10.5194/egusphere-2025-2405","DOIUrl":"https://doi.org/10.5194/egusphere-2025-2405","url":null,"abstract":"<strong>Abstract.</strong> Manure is known to improve soil organic carbon (SOC) in Fe-rich red soils, while the underlying stabilization mechanisms remain poorly understood. In this study, four treatments were selected: (1) no amendment (Control), (2) low manure (LM, 150 kg N ha^-1 yr^-1), (3) high manure (HM, 600 kg N ha^-1 yr^-1), (4) high manure with lime (HML, 600 kg N ha^-1 yr^-1plus 3000 kg Ca (OH)₂ha^-1 3yr^-1). The quantity and quality of topsoil (0–20 cm) organic carbon were investigated by physical fractionation, ¹³C-nuclear magnetic resonance (NMR) spectroscopy and thermogravimetry (TG) analysis. Manure application increased total SOC by 65.1 %–126.7 % (primarily in the particulate organic matter (POM) fraction), while the mineral-associated organic matter fraction (MAOM), despite its higher C content (4.18–7.09 g C kg⁻¹), contributed less (65.4 %–71.0 %) compared to the control (82.4 %). POM C was stabilized via hierarchical aggregation: fresh manure inputs acted as binding nuclei, increasing macroaggregates (&gt;0.25 mm) while reducing microaggregates (0.05–0.25 mm), physically isolating labile C from microbial decomposition. Concurrently, manure amendments triggered Fe-mediated chemical stabilization. Elevated pH (4.8 to 5.4–7.1) enhanced non-crystalline Fe oxide (Fe_o) content (+25.4 %), which positively correlated with MAOM C (<em>R</em>² = 0.56, <em>P</em> &lt; 0.05). Despite a chemical composition shift toward aliphaticity and reduced aromaticity, thermally stable organic matters increased by 8 %–12 %, revealing critical role of Fe_o (aggregates were destroyed before TG analysis) in offsetting inherent molecular lability. Overall, this study establishes a dual SOC stabilization framework for subtropical red soils, highlighting physical protection through aggregation processes and chemical protection via Fe-carbon associations.","PeriodicalId":48610,"journal":{"name":"Soil","volume":"60 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144478969","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":"Soil carbon accrual and biopore formation across a plant diversity gradient","authors":"Kyungmin Kim, Maik Geers-Lucas, G. Phillip Robertson, Alexandra N. Kravchenko","doi":"10.5194/egusphere-2025-2584","DOIUrl":"https://doi.org/10.5194/egusphere-2025-2584","url":null,"abstract":"<strong>Abstract.</strong> Plant diversity promotes soil organic carbon (SOC) gains through intricate changes in root-soil interactions and their subsequent influence on soil physical and biological processes. We assessed SOC and pore characteristics of soils under a range of switchgrass-based plant systems, representing a gradient of plant diversity with species richness ranging from 1 to 30 species 12 years after their establishment. We focused on soil biopores as indicators of root activity legacy, measured using X-ray computed micro-tomography scanning, and explored biopore relationships with SOC accumulation. Plant functional richness explained 29 % of bioporosity and 36 % of SOC variation, while bioporosity itself explained 36 % of the variation in SOC. The most diverse plant system (30 species) had the highest SOC, while long-term bare soil fallow and monoculture switchgrass had the lowest. Of particular note was a two-species mixture of switchgrass (Panicum virgatum L.) and ryegrass (Elymus canadensis), which exhibited the highest bioporosity and achieved SOC levels comparable to those of the systems with 6 and 10 plant species, and were inferior only to the system with 30 species. We conclude that plant diversity may enhance SOC through biopore-mediated mechanisms and suggest a potential for identifying specific plant combinations that may be particularly efficient for fostering biopore formation and subsequently SOC sequestration.","PeriodicalId":48610,"journal":{"name":"Soil","volume":"31 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144479065","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":"Improving the relationship between soil texture and large-scale electromagnetic induction surveys using a direct current electrical resistivity calibration","authors":"Joshua Howard Thompson, Dimitrios Ntarlagiannis, Lee Slater","doi":"10.5194/egusphere-2025-2434","DOIUrl":"https://doi.org/10.5194/egusphere-2025-2434","url":null,"abstract":"<strong>Abstract.</strong> Ground-based electromagnetic induction (EMI) surveys can be used to infer soil properties and (by extension) support nutrient loss risk assessments of agricultural fields. The transport of nutrients from an agricultural field to surrounding surface waters depends on the hydrologic connectivity between the two systems, largely controlled by soil texture. Preexisting soil texture maps and associated soil drainage classifications are often used as proxy information to assess the potential for lateral migration of nutrients in the groundwater; however, the resolution of these maps is inadequate at the scale of individual fields. In this study, we evaluated whether the relationship between EMI data and soil texture was improved by calibrating the apparent electrical conductivity measured by an EMI sensor with a 2D electrical resistivity imaging (ERI) survey. The joint geophysical survey was performed across a ~1-ha field in Princess Anne, Maryland, United States. A calibration-inversion-comparison framework is presented that calibrates the EMI measurements using ERI conductivity models and subsequently inverts the EMI data. A robust validation scheme compared the calibrated and not calibrated EMI conductivity models against grain size, core-scale conductivity measurements and an ERI survey performed roughly 80 m from the first. This study shows that the calibration of EMI data with an ERI profile is significantly improves the quantitative relationship between EMI-derived electrical conductivity and representative soil properties, ensuring a finer-resolution proxy soil map for evaluating subsurface nutrient transport from agricultural fields.","PeriodicalId":48610,"journal":{"name":"Soil","volume":"45 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144371177","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":"Reducing Temporal Uncertainty in Soil Bulk Density Estimation Using Remote Sensing and Machine Learning Approaches","authors":"Sunantha Ousaha, Zhenfeng Shao, Zeeshan Afzal","doi":"10.5194/egusphere-2025-2360","DOIUrl":"https://doi.org/10.5194/egusphere-2025-2360","url":null,"abstract":"<strong>Abstract.</strong> Soil bulk density (BD), a key physical property affecting soil compaction, porosity, and carbon stock estimation, exhibits considerable spatial and temporal variability. However, current BD estimation methods especially traditional pedotransfer functions (PTFs) are inherently static and not designed for temporal analysis. This presents a significant limitation for soil monitoring across large and heterogeneous regions. In this study, we developed a machine learning (ML) approach integrated with remote sensing data to map and monitor BD across Thailand from 2004 to 2009 at national scale. We used multispectral indices, topographic variables, climate data, and organic carbon content to train six ML models: Artificial Neural Networks (ANN), Deep Neural Networks, Random Forest, Support Vector Regression, XGBoost, and LightGBM. Model performance was evaluated using in-situ BD measurements from 236 soil samples collected in 2004. For benchmarking purposes, 76 published PTFs were also assessed on the same dataset. Results showed that the ANN model achieved the highest prediction accuracy (R² = 0.986; RMSE = 0.017 g cm^-3), outperforming both other ML models and all PTFs. Temporal analysis using the ANN model revealed a 7.27 % increase in mean BD and a 41.23 % reduction in standard deviation between 2004 and 2009, indicating increased soil compaction and reduced variability. Feature importance analysis identified organic carbon, vegetation indices, slope, and temperature as the most influential variables. The resulting high-resolution BD maps captured national-scale spatial and temporal trends and provide a robust foundation for soil quality monitoring, carbon accounting, and sustainable land use planning in tropical agroecosystems.","PeriodicalId":48610,"journal":{"name":"Soil","volume":"6 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144320102","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":"Do composted bioamendments enhance the resistance of Mediterranean agricultural soils and their microbial carbon use efficiency to extreme heat-stress events?","authors":"Sana Boubehziz, Emily C. Cooledge, David Robert Chadwick, Vidal Barrón, Antonio Rafael Sánchez-Rodríguez, Davey Leonard Jones","doi":"10.5194/egusphere-2025-2592","DOIUrl":"https://doi.org/10.5194/egusphere-2025-2592","url":null,"abstract":"<strong>Abstract.</strong> Mediterranean agroecosystems are vulnerable to extreme heat-stress, especially because of their low organic matter content. Bioamendments may enhance soil nutrient content and microbial resilience to heatwaves. However, their effectiveness under these conditions is still unclear. We investigated the effect of bioamendments (composted olive mill pomace, biosolids and solid urban residue) and a conventional fertiliser (diammonium phosphate) on microbial carbon use efficiency (CUE), and soil biogeochemistry in two different soils, a calcareous Vertisol and a non-calcareous Inceptisol, with low P availability, subjected to extreme heat-stress. We conducted warming experiments (20, 30, 40, or 50 °C), to monitor ¹⁴C-glucose mineralization and to evaluate modifications in soil biochemical properties. As result of warming, both soils microorganisms exhibited thermotolerance until 40 °C, with a critical shift in microbial respiration observed at 50 °C. Consequently, microbial CUE, which was a function of the bioamendments and soil, significantly declined from 0.47–0.65 at 20 °C to 0.27–0.45 at 50 °C (<em>p</em> &lt; 0.05), with the control decreasing by 0.010 ± 0.001 °C^-1 (Vertisol) and 0.007 ± 0.001 °C^-1 (Inceptisol). Moreover, composted olive mill pomace-treated soils enhanced the resistance of soils to heat stress as they produced the highest microbial CUE at 40 °C in the Inceptisol and 50 °C in both soils (0.43 ± 0.02 Inceptisol vs. 0.45 ± 0.02 Vertisol). Soil biogeochemistry varied with temperature and treatment, while available P in soils treated with diammonium phosphate was reduced with temperature in both soils, and available P added with bioamendments was not affected by temperature but was increased with biosolids for all temperatures in the Inceptisol. In conclusion, organic matter rich bioamendments (composted olive mill pomace) may enhance the resistance of Mediterranean agricultural soils subjected to extreme heat-stress events (50 °C).","PeriodicalId":48610,"journal":{"name":"Soil","volume":"11 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144311396","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":"Methane oxidation potential of soils in a rubber plantation in Thailand affected by fertilization","authors":"Jun Murase, Kannika Sajjaphan, Chatprawee Dechjiraratthanasiri, Ornuma Duangngam, Rawiwan Chotiphan, Wutthida Rattanapichai, Wakana Azuma, Makoto Shibata, Poonpipope Kasemsap, Daniel Epron","doi":"10.5194/soil-11-457-2025","DOIUrl":"https://doi.org/10.5194/soil-11-457-2025","url":null,"abstract":"Abstract. Forest soils, as crucial sinks for atmospheric methane in terrestrial ecosystems, are significantly impacted by changes in ecosystem dynamics due to deforestation and agricultural practices. This study investigated the methane oxidation potential of rubber plantation soils in Thailand, focusing on the effect of fertilization. The methane oxidation activity of the topsoils (0–10 cm) in the dry season was extremely low and increased slightly in the wet season, with lower activity for higher fertilization levels. The methane oxidation potential of the topsoil was too low to explain the in situ methane uptake. Soils below 10 cm depth in unfertilized rubber plantations showed higher activity than the surface soils, and methane oxidation was detected down to, at least, 60 cm depth. In contrast, soils under the high-fertilization treatment exhibited similarly low activity of methane oxidation up to 60 cm depth compared to surface soils during both dry and wet seasons, indicating that fertilization of para rubber plantations negatively impacts the methane oxidation potential of the soils over the deep profile without recovery in the dry (off-harvesting) season with no fertilization. Methane uptake per area, estimated by integrating the methane oxidation potentials of soil layers, was comparable to the field flux data, suggesting that methane oxidation in the soil predominantly occurs at depths below the surface layer. These findings have significant implications for understanding the environmental impacts of tropical forest land uses on methane dynamics and underscore the importance of understanding methane oxidation processes in soils.","PeriodicalId":48610,"journal":{"name":"Soil","volume":"3 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144296153","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}