Geoderma Regional最新文献

{"title":"Influence of parent materials, landforms and climate on the soil properties distribution in northern and central Malawi","authors":"Cornelius Mgobola Chisambi ,&nbsp;Hitoshi Shinjo","doi":"10.1016/j.geodrs.2025.e01047","DOIUrl":"10.1016/j.geodrs.2025.e01047","url":null,"abstract":"<div><div>Parent material, landform, and climate strongly influence soil properties, yet their combined effects remain underexplored in Malawi. This study analysed B horizon samples from 41 soil profiles developed on diverse parent materials, landforms (rift valley floor, escarpments, mid- and high-altitude plateaus), and climatic zones across northern and central Malawi. Total elemental composition was used to infer parent material origin and weathering intensity, while effective precipitation (EP; precipitation minus potential evapotranspiration) ranged from −362 to 954 mm. Based on total elemental composition, soils were grouped into four categories: <strong>silica-rich</strong> (356.0 g kg⁻¹ Si), <strong>iron-rich</strong> (92.4 g kg⁻¹ Fe), <strong>intermediate</strong> (297.1 g kg⁻¹ Si, 55.0 g kg⁻¹ Fe), and <strong>CaMgK enriched</strong> (7.0, 4.6, and 20.0 g kg⁻¹, respectively). Silica-rich soils exhibited high sand, Al³⁺, kaolinite, and quartz contents but low pH, total exchangeable bases (TEB), cation exchange capacity (CEC), total reserve bases (TRB), and mica—reflecting felsic parent materials and advanced weathering. These soils, mainly from stable mid-plateaus, were classified as Lixisols, with few Acrisols and Arenosols from the rift valley floor. Iron-rich soils, predominantly from escarpments, had high clay, pH, TEB, CEC (soil and clay), TRB, and mica, indicating not advanced weathering and the presence of weatherable primary minerals. These were mostly Luvisols, Cambisols, and Alisols. Intermediate soils from mid- and high-altitude plateaus showed transitional properties; those from mid-altitude plateau developed into Luvisols and Lixisols, while those from high plateaus under higher EP formed Acrisols. CaMgK enriched soils, common in unstable rift valley and escarpment zones, had the highest pH, TEB, CEC, TRB, and mica but low kaolinite, indicating limited weathering linked to erosion–deposition processes. These were mainly Luvisols, Cambisols, and Vertisols. Increasing EP corresponded with declining pH, TEB, and base saturation, and rising Al³⁺, reflecting leaching and Acrisol formation under wetter and in stable conditions. Overall, parent material, landform, and climate collectively shaped soil properties and classification, with iron-rich soils appearing less weathered than expected, likely due to ongoing tectonic rejuvenation within the Malawi Rift Valley.</div></div>","PeriodicalId":56001,"journal":{"name":"Geoderma Regional","volume":"44 ","pages":"Article e01047"},"PeriodicalIF":3.3,"publicationDate":"2025-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145925804","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 rock fragments on water infiltration and physical properties of volcanic soils in southern Brazil","authors":"Geane Alves de Moura ,&nbsp;Fabrício de Araújo Pedron ,&nbsp;Paulo Ivonir Gubiani ,&nbsp;Ricardo Simão Diniz Dalmolin ,&nbsp;Jean Michel Moura-Bueno ,&nbsp;Luis Eduardo Akiyoshi Sanches Suzuki ,&nbsp;Noeme da Costa Santos ,&nbsp;Raí Ferreira Batista ,&nbsp;Issa Buana Alfane ,&nbsp;Luís Felipe Rech ,&nbsp;Victor Hugo Carvalho Sabóia ,&nbsp;Bruna Trevizan Paese ,&nbsp;Agnes Estela Fontana","doi":"10.1016/j.geodrs.2025.e01045","DOIUrl":"10.1016/j.geodrs.2025.e01045","url":null,"abstract":"<div><div>The presence of rock fragments (RF) is a common feature in agricultural areas with sloping terrain and poorly developed soils, potentially modifying soil physical attributes and water dynamics. We investigated the relationships among RF content, water infiltration, bulk density, and porosity in volcanic agricultural soils of southern Brazil, using 123 sampling points distributed across different soil classes, RF contents, and slope gradients. Infiltration data showed high variability: cumulative infiltration (I) ranged from 3 to 2275 mm, while the steady-state infiltration rate (i) ranged from 2 to 957 mm h⁻¹, both with large standard deviations. No significant differences in i or I were observed among slope classes. We found greater cumulative infiltration, lower bulk density, and higher fine-earth porosity in poorly developed soils (Leptosols and Regosols) with higher RF content. However, RF content did not significantly influence water infiltration in the evaluated soils. Bulk density and total porosity remained relatively stable despite variations in RF content. Infiltration in these stony agricultural soils exhibited high variability and low correlations with morphological and physical properties, indicating a complex multivariate behavior not easily captured by routine analyses.</div></div>","PeriodicalId":56001,"journal":{"name":"Geoderma Regional","volume":"44 ","pages":"Article e01045"},"PeriodicalIF":3.3,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145839920","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 color serves as a key pedogenic indicator in the Godavari Basin, India","authors":"Gizachew Ayalew Tiruneh ,&nbsp;Bhaskara Phaneendra ,&nbsp;Ciro Abbud Righi","doi":"10.1016/j.geodrs.2025.e01046","DOIUrl":"10.1016/j.geodrs.2025.e01046","url":null,"abstract":"<div><div>The Godavari River basin, a major rice —producing region, requires an accurate understanding of soil drainage to enhance crop productivity. Soil color-evaluated using the Munsell chart and converted to the CIE Lab system, acts as a reliable indicator of soil moisture, texture, and drainage. In this system, L* denotes lightness, a* redness, and b* yellowness. A drainage index was derived using Mahalanobis distance based on these color parameters. A total of forty-two soil profiles were opened from three landforms—fluvial, fluviomarine, and marine—using a 1:250,000-scale soil resource inventory. Fluvial soils exhibited clay to silty clay textures with Ap horizons (0–18 cm) and Bg horizons extending beyond 100 cm, indicating sustained alluvial deposition. Fluviomarine soils displayed stratified silty clay to silty clay loam and sand layers with subsoil effervescence, indicating carbonate accumulation under combined fluvial and marine influence. In contrast, marine soils showed lighter silt loam to sandy textures, reflecting slower pedogenesis. CIE Lab analysis showed marine soils are lighter (L* = 50.65) with higher b* values (23.76), while fluvial soils are darker (L* = 33.88) and more reddish-yellow (b* = 12.32). Fluviomarine soils exhibited the highest color variability, reflecting heterogeneous sediment mixing and fluctuating redox conditions. Drainage assessments showed moderate to poor subsoil drainage in fluvial and fluviomarine soils, which influenced root growth, water retention, and soil color. These results demonstrated strong relationships between soil color, texture, and drainage, emphasizing the need for site-specific management to optimize irrigation, fertility, and pedogenesis in the Godavari rice landscapes.</div></div>","PeriodicalId":56001,"journal":{"name":"Geoderma Regional","volume":"44 ","pages":"Article e01046"},"PeriodicalIF":3.3,"publicationDate":"2025-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145839921","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 formation conditions, processes and classification on the Baltic Sea coast of Latvia","authors":"Baiba Dirnēna ,&nbsp;Oļģerts Nikodemus ,&nbsp;Karīna Bagāta ,&nbsp;Guntis Brūmelis ,&nbsp;Raimonds Kasparinskis ,&nbsp;Māris Krievāns ,&nbsp;Imants Kukuļs","doi":"10.1016/j.geodrs.2025.e01044","DOIUrl":"10.1016/j.geodrs.2025.e01044","url":null,"abstract":"<div><div>This study investigates the complex and dynamic soil formation processes on the Baltic Sea coast, where the parent material consists of sandy sediments derived from the Baltic Ice Lake. It focuses on morphological and physicochemical transformations driven by recurrent disturbances, including forest fires, wind erosion, potential slash-and-burn agriculture, marine aerosol deposition, and the aeolian transport of beach sand into the forest ecosystem. Pedogenesis initially progressed through podzolization but was subsequently replaced by alkalinization and depodzolization, as indicated by an increase in soil pH and a relatively low Fe_d/Fe_t ratio in the B horizon. This suggested a relatively short podzolization phase, which was further reinforced by the neutralisation of soil acidity and the low organic matter content in the upper horizons. Eolian activity caused the erosion, transport and subsequent burial of the initial soil, preserving morphological characteristics typical of a podzol. However, the chemical properties of the B horizon did not fulfil the criteria for a spodic horizon. Mean pH values in the upper horizons were 7.3 (H₂O) and 6.0 (BaCl₂), whereas pH in the B horizon consistently exceeded 5.9. Elevated concentrations of Ca, Mg and K in the upper soil horizons, along with higher pH, indicated a strong marine aerosol influence. According to WRB 2022, the soils are classified as Eutric Brunic Aeolic Arenosols (Amphiclaric, Novic, Ochric) or Eutric Brunic Aeolic Arenosols (Epiclaric, Novic, Ochric). These findings enhance our understanding of coastal soil pedogenesis, clarify the impact of various disturbances in soil development and highlight the classification challenges posed by coastal aeolian environment.</div></div>","PeriodicalId":56001,"journal":{"name":"Geoderma Regional","volume":"44 ","pages":"Article e01044"},"PeriodicalIF":3.3,"publicationDate":"2025-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145790671","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":"Short-term effects of converting degraded pasture to silvopastoral systems on soil carbon and nitrogen dynamics in a Brazilian Oxisol","authors":"Róberson Machado Pimentel ,&nbsp;Dilermando Miranda da Fonseca ,&nbsp;Emanuelle Mercês Barros Soares ,&nbsp;Sílvio Nolasco de Oliveira Neto ,&nbsp;Geraldo Fábio Viana Bayão ,&nbsp;Rafael da Silva Teixeira ,&nbsp;Igor Lima Bretas ,&nbsp;Wesley dos Santos Souza ,&nbsp;Rafael Gonçalves Tonucci ,&nbsp;Bruno Grossi Costa Homem ,&nbsp;Fernanda Helena Martins Chizzotti","doi":"10.1016/j.geodrs.2025.e01042","DOIUrl":"10.1016/j.geodrs.2025.e01042","url":null,"abstract":"<div><div>Integrated crop–livestock–forestry systems is a strategy for removing atmospheric CO₂ emissions and enhancing the resilience of agricultural to climate change. This study assessed recovery of degraded areas through silvopastoral systems (SPS) and their monocultures on soil carbon (C) and nitrogen (N) stocks six years after establishment. The systems included: SPS with intrarow spacings of 2 or 4 m and an interrow spacing of 12 m; <em>Eucalyptus</em> spp. monoculture (3 × 3 m); renovated pasture monoculture; degraded pasture; and native vegetation. The total C and N stocks were calculated up to 100 cm and expressed on an equivalent soil mass basis, using native vegetation as the reference. Monoculture systems, whether renovated pasture (112.2 Mg C ha⁻¹ and 7.9 Mg N ha⁻¹) or Eucalyptus (101.3 Mg C ha⁻¹ and 7.9 Mg N ha⁻¹), did not restore soil C and N stocks to levels comparable with native vegetation (122.4 Mg C ha⁻¹ and 10.0 Mg N ha⁻¹). In contrast, the SPS (118.7 Mg C ha⁻¹ and 9.3 Mg N ha⁻¹) had greater C and N stocks than those in degraded pasture (104.8 Mg C ha⁻¹ and 6.6 Mg N ha⁻¹) and N stocks similar for the native vegetation. Moreover, SPS significantly increased C in particulate organic matter (POM<img>C) and improved the C management index at 20–40 cm (CMI = 59) and 40–60 cm (CMI = 90) depths compared to degraded pasture (CMI = 23 and 28, respectively). These findings underscore the potential of SPS as a sustainable strategy for recovering degraded pastures and improving soil quality.</div></div>","PeriodicalId":56001,"journal":{"name":"Geoderma Regional","volume":"44 ","pages":"Article e01042"},"PeriodicalIF":3.3,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145839980","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":"Transformation of the qualitative composition of soil organic matter in podzolic chernozem under the application of composts","authors":"Yevhen Skrylnyk,&nbsp;Maxim Popirny,&nbsp;Аngela Kutova,&nbsp;Svitlana Krylach","doi":"10.1016/j.geodrs.2025.e01043","DOIUrl":"10.1016/j.geodrs.2025.e01043","url":null,"abstract":"<div><div>Given the important role of soil organic matter (SOM) in the global carbon cycle and its potential feedbacks under fertilizer application, understanding how organic matter composition and molecular structure of humic substances responds to prolonged organic fertilization is of great scientific interest. The aim of this study was to investigate the transformation of humic composition in chernozem organic matter using Tyurin fractionation, alongside structural characterization of isolated humic acids by size-exclusion chromatograph and polyacrylamide gel electrophoresis (SEC-PAGE) techniques, following a five-year application of organic fertilizers based on composted chicken manure. We found that the intensive formation of “young,” labile humic substances as first stage of humification occurred after the first year of manure compost application, accompanied by an increase in soil organic carbon. After five years of organic manure application, the organic matter fractions became more stabilized, as evidenced by an increase in mature humic fractions but accompanied by a decrease in the proportion of labile fractions. The increasing molecular complexity of chernozem humic acids after five years of manure compost application may be attributed to a higher content of stable low-molecular-weight molecules in compost, such as aromatic non-polar structures that strong absorb in ultraviolet. The most complex humic molecular structures were found from chernozem subjected to application of composted manure and husk, which contained a high abundance of condensed aromatic already formed humic structures. This molecular complexity may result from active hydrophobic humification, accompanied by the self-assembly of amphiphilic condensed aromatic structures into stable and complex hydrophobic humic supramolecular aggregates. These aggregates bind with calcium and subsequently with mineral clays, leading to the formation of mature humic fractions promote organic matter stabilization effect. We demonstrate the applicability of size-exclusion chromatograph and polyacrylamide gel electrophoresis fractionation techniques for evaluating the molecular complexity of humic structural organization in agricultural soil under organic fertilization by identifying low-molecular-weight humic fractions.</div></div>","PeriodicalId":56001,"journal":{"name":"Geoderma Regional","volume":"44 ","pages":"Article e01043"},"PeriodicalIF":3.3,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145790670","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":"Can cohesive soils still have functional pores? An analysis based on X-ray microtomography","authors":"José V. Gaspareto ,&nbsp;Thaís N. Pessoa ,&nbsp;Talita R. Ferreira ,&nbsp;Luiz F. Pires","doi":"10.1016/j.geodrs.2025.e01041","DOIUrl":"10.1016/j.geodrs.2025.e01041","url":null,"abstract":"<div><div>Cohesive soils account for over 100,000 km² of the Brazilian territory and support extensive agricultural areas, particularly in coastal regions. However, they present challenges for farming because they harden considerably when dry. Therefore, it is essential to study how the pore network of these soils changes during drying. This understanding is essential for promoting sustainable soil management and more efficient use of water resources. This study utilized X-ray microtomography (voxel size: 9.7 μm) to characterize the pore architecture of a cohesive Oxisol under Semideciduous Seasonal Forest, known for its high bulk density. The average imaged porosity was 11.16 % (<em>n</em> = 5), reflecting the soil's dense nature, with the average macroporosity (pores with an equivalent radius &gt; 40 μm) accounting for 63.02 % of the total pore volume. The predominance of macropores contributes to a porous system with a predominant contribution from larger-diameter pores (volume &gt; 10.0 mm³). Despite the low imaged porosity, the soil demonstrated low tortuosity and intermediate pore connectivity, suggesting effective potential pathways for water and gas flow in multiple directions. Pore shape analysis revealed a predominance of elongated pores (prolate and triaxial shapes), which may be associated with biological activity and the natural dynamics of soil matrix reorganization. Principal component analysis (PCA) further supported these findings, showing that the presence of larger pores contributed significantly to imaged porosity and structural complexity, while smaller pores primarily determined the total number of pores. These findings emphasize the importance of examining the micrometric scale pore architecture to understand the functionality of cohesive soils. They demonstrate that the high bulk density typical of cohesive soil horizons does not preclude the presence of a functionally relevant porous system, essential for soil hydrodynamics.</div></div>","PeriodicalId":56001,"journal":{"name":"Geoderma Regional","volume":"44 ","pages":"Article e01041"},"PeriodicalIF":3.3,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145737976","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":"Oxalate-extractable aluminium is a key predictor of organic carbon content in Swedish agricultural topsoils","authors":"Miyanda Chilipamushi ,&nbsp;Claudia von Brömssen ,&nbsp;Tino Colombi ,&nbsp;Thomas Kätterer ,&nbsp;Mats Larsbo","doi":"10.1016/j.geodrs.2025.e01038","DOIUrl":"10.1016/j.geodrs.2025.e01038","url":null,"abstract":"<div><div>Previous research has shown the importance of oxalate-extractable aluminium (Alox) for predicting soil organic carbon (SOC) contents across diverse geographical regions. However, studies using data from humid continental climates are scarce, and the data used in these studies have not been statistically representative for larger scales. Our study aimed to 1) evaluate the influence of soil physical and geochemical properties (specifically Alox), farm management, and climate on the spatial distribution and storage potential of SOC in Swedish agricultural soils and 2) to assess whether estimates of aggregation, assumed to influence the protection of soil organic matter, could improve predictions. We analyzed a statistically representative subset of mineral soils with pH &lt; 7 from the Swedish soil and crop monitoring program, which covers the country's agricultural land. We identified the most important predictors for topsoil SOC contents using a random forest model. We employed partial dependence plots to visualize and interpret the interactions between key variables and SOC contents. Results showed that Alox was the most important predictor for SOC contents, as evidenced by its high relative importance score and the increased out-of-bag error when removed from the model. Notably, SOC content reached a plateau at Alox contents of about 3.5 g kg⁻¹, suggesting the possibility of SOC under-saturation. Climatic variables were of secondary importance, while farm management did not emerge as a significant predictor. Surprisingly, silt-sized aggregation was not identified as an important variable for predicting SOC content. Our findings emphasize the importance of incorporating geochemical properties, particularly Alox, in addition to soil texture, in predictive modelling and monitoring efforts for enhanced soil carbon management in humid climates.</div></div>","PeriodicalId":56001,"journal":{"name":"Geoderma Regional","volume":"44 ","pages":"Article e01038"},"PeriodicalIF":3.3,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145790669","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":"Readily available water supply across soil variability in a center-pivot irrigated soybean field using the least limiting water range approach","authors":"Igor Alexandre de Souza ,&nbsp;Dorotéo de Abreu ,&nbsp;Alceu Linares Pádua Junior ,&nbsp;Sérgio Henrique Godinho Silva ,&nbsp;Bruno Montoani Silva","doi":"10.1016/j.geodrs.2025.e01040","DOIUrl":"10.1016/j.geodrs.2025.e01040","url":null,"abstract":"<div><div>Intensified agricultural production frequently has a negative impact on soil physical-hydric properties, contributing significantly to soil degradation in the Brazilian Cerrado. The objective of this study was to assess the soil physical-hydric environment within a consolidated no-tillage system with at least 21 years of implementation. Three soil profiles were studied in representative locations of the 110 ha, with disturbed and undisturbed soil samples taken to represent the A, BA, and Bw1 horizons. The morphological description of the soil profiles was first performed, followed by analyses of soil granulometry, bulk density, soil particle density, and least limiting water range (LLWR) models for the entire area and profile of each horizon. The soils of the three profiles were classified as Dystrophic Yellow Latosol and had a sandy clay loam texture. The soil particle density ranged from 2.52 to 2.61 Mg m⁻³, and the bulk density average was 1.04 Mg m⁻³. The LLWR for the entire area showed field capacity and wilting point values of 0.26 and 0.22 m³ m⁻³, respectively, which were indicators of soil degradation in the A horizon. According to LLWR models, soil bulk density levels above 1.24 Mg m⁻³ impose physical constraints on plant development, with values above 1.31 Mg m⁻³ indicating more severe limitations. These findings highlight the effectiveness of LLWR in monitoring soil physical and water quality, and the penetration resistance becomes the main factor regardless of water content and aeration porosity.</div></div>","PeriodicalId":56001,"journal":{"name":"Geoderma Regional","volume":"44 ","pages":"Article e01040"},"PeriodicalIF":3.3,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145925802","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":"Glomalin-related soil protein as an indicator of changes generated by prescribed burning of scrubland in the Central Pyrenees: A ten-year study","authors":"Mohamed Emran ,&nbsp;Andoni Alfaro-Leranoz ,&nbsp;Clara Martí-Dalmau,&nbsp;David Badía-Villas","doi":"10.1016/j.geodrs.2025.e01039","DOIUrl":"10.1016/j.geodrs.2025.e01039","url":null,"abstract":"<div><div>The removal of shrub cover invading subalpine pastures in the southern Pyrenees is increasingly carried out by prescribed burning (PB). This study assesses the impact of PB on topsoil components utilizing glomalin-related soil protein (GRSP) fractions and associated soil properties as indicators. Three fractions were analyzed: easily extractable (EE-GRSP), moderately extractable (ME-GRSP), and difficultly extractable (DE-GRSP), together with their organic carbon content (C-GRSP). Soil samples were collected at 0–1, 1–2, and 2–3 cm depth across a fire chronosequence: unburned (UB), immediately after PB (B0), and 6- and 10-year post-burn.</div><div>Total C-GRSP declined sharply after PB (8.44 g kg⁻¹ in UB to 5.95 g kg⁻¹ in B0) and continued decreasing at 6 and 10 years (3.54 g kg⁻¹ and 2.24 g kg⁻¹, respectively), reflecting long-term sensitivity to the disturbance that PB represents. EE-GRSP and DE-GRSP followed similar trends, with EE-GRSP showing the strongest reduction, suggesting higher sensitivity to vegetation cover loss and microbial disruption. The EE-GRSP/TGRSP ratio dropped after burning but partially recovered after 10 years, indicating gradual reactivation of glomalin production. Although concentrations decreased with soil depth, differences among the 0–3 cm layers were not significant under fire effects.</div><div>All GRSP fractions were strongly and positively correlated with organic carbon, total nitrogen, microbial biomass, basal respiration, and glucosidase activity. These findings highlight GRSP fractions and ratios as sensitive indicators of soil biochemical responses and recovery following low-severity PB. The results highlight the impact of fire on organic matter of microbial origin and the value of GRSP for monitoring soil resilience over time in ecosystems managed by fire.</div></div>","PeriodicalId":56001,"journal":{"name":"Geoderma Regional","volume":"44 ","pages":"Article e01039"},"PeriodicalIF":3.3,"publicationDate":"2025-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145737977","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}