Geoderma最新文献

{"title":"Responses of soil respiration and microbial activity in Phragmites australis and Spartina alterniflora marshes to hydrological changes","authors":"Yalei Li ,&nbsp;Lina Xie ,&nbsp;Shihua Li ,&nbsp;Shiwei Lin ,&nbsp;Weiran Cheng ,&nbsp;Zhenming Ge","doi":"10.1016/j.geoderma.2025.117511","DOIUrl":"10.1016/j.geoderma.2025.117511","url":null,"abstract":"<div><div>Coastal wetlands face unprecedented challenges from sea-level rise; however, the effects of increased waterlogging and salinity on soil respiration remain unclear, particularly given the contrasting stress tolerance strategies of dominant marsh species such as native <em>Phragmites australis</em> and invasive <em>Spartina alterniflora</em>. We conducted a mesocosm experiment to compare soil respiration responses to waterlogging (control: low water level; treatment: high water level) and salinity (control: 0 ppt; treatments: 5, 15, and 30 ppt) between these two species, while also examining the underlying mechanisms and the role of drainage. Under waterlogged conditions, high water levels significantly suppressed soil respiration, with <em>P. australis</em> exhibiting a greater reduction than <em>S. alterniflora</em> (78.9 % vs. 74.4 %). The species showed distinct responses to salinity: high salinity (30 ppt) caused a more pronounced reduction in <em>P. australis</em> than in <em>S. alterniflora</em> (56.4 % vs. 28.9 %). Drainage conditions fundamentally altered these responses; <em>P. australis</em> showed a greater post-drainage enhancement under high water level (42.4 % vs. 12.9 %) but consistently exhibited higher sensitivity to salinity. These species-specific responses were mediated by differential changes in root biomass, microbial biomass carbon, and carbon-cycling enzyme activities. Principal component analysis revealed clear ecological niche separation along the stress gradients, with <em>S. alterniflora</em> maintaining higher biological activity and <em>P. australis</em> displaying greater stress sensitivity under severe combined conditions. The combined effects of waterlogging and salinity revealed non-additive impacts on soil respiration, with <em>S. alterniflora</em> demonstrating superior tolerance through sustained microbial activity and root functioning. Our findings underscore the importance of considering species-specific adaptive strategies and tidal dynamics when predicting coastal wetland carbon cycling under future sea-level rise scenarios, as the differential stress responses of these ecologically significant species may substantially influence ecosystem carbon dynamics.</div></div>","PeriodicalId":12511,"journal":{"name":"Geoderma","volume":"462 ","pages":"Article 117511"},"PeriodicalIF":6.6,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of visual soil evaluations in a semiarid region","authors":"Mark A. Liebig,&nbsp;Claire N. Friedrichsen,&nbsp;Andrea K. Clemensen,&nbsp;David W. Archer","doi":"10.1016/j.geoderma.2025.117509","DOIUrl":"10.1016/j.geoderma.2025.117509","url":null,"abstract":"<div><div>Visual soil evaluations (VSEs) offer land managers a valuable method to efficiently assess soil condition. Scores from quantitative VSEs are often associated with soil properties known to directly influence agroecosystem function, thereby providing useful information to guide management decisions. However, practitioner awareness and adoption of VSEs is limited, particularly in North America. To explore the potential utility of VSEs for practitioner use, a half-day workshop was developed for interested farmers, conservationists, extension educators, and other agriculturalists. The workshop, developed by the USDA-ARS Northern Great Plains Research Laboratory, Mandan, ND USA, provided a brief overview of the Visual Evaluation of Soil Structure (VESS) followed by opportunities to apply the method on five fields with different cropping practices but a common soil type (Typic Haplustoll; USDA). The workshop was held four times between 2018 and 2023 following spring wheat (<em>Triticum aestivum</em> L.) harvest. Workshop attendees were able to discern differences in soil structure among cropping practices using VESS (<em>P ≤ 0.01</em>). Mean attendee VESS scores were 3.8, 2.6, 3.0, 2.4, and 1.1 for spring wheat-fallow, 3-yr, 5-yr, Dynamic, and Dynamic + Manure cropping system treatments, respectively. Attendee VESS scores were significantly associated with the instructor’s VESS scores (r = 0.85), along with measurements of soil organic matter (r = −0.82), soluble C (r = −0.84), C mineralization (r = -0.82), spring wheat grain yield (r = −0.51), and straw yield (r = −0.67). Findings from this study suggest land managers can quickly acquire skills necessary to effectively apply VSEs for assessment of rainfed cropping practices in a semiarid region.</div></div>","PeriodicalId":12511,"journal":{"name":"Geoderma","volume":"462 ","pages":"Article 117509"},"PeriodicalIF":6.6,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Root-mediated regulation of soil infiltration dynamics in eroded Mollisols","authors":"Yang Zhang ,&nbsp;Zhonglin Pang ,&nbsp;Jing Chen ,&nbsp;Xiangwei Chen ,&nbsp;Enheng Wang","doi":"10.1016/j.geoderma.2025.117508","DOIUrl":"10.1016/j.geoderma.2025.117508","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Water infiltration is a fundamental hydrological process in terrestrial ecosystems, influencing surface runoff, soil erosion, plant growth, and groundwater recharge. Although vegetation restoration is widely recognized for improving soil infiltration, how root-soil interactions respond to erosion-induced changes in soil profile stratification and related properties, and how these responses affect the hydrological effectiveness of vegetation restoration, remain poorly understood. In this study, we simulated the topsoil loss due to erosion by constructing soil columns with varying thicknesses of the black soil layers (30 cm, 20 cm, 10 cm, and 0 cm), representing a stage of no erosion, mild erosion, moderate erosion, and severe erosion. This gradient was achieved by layering different proportions of surface black soil and underlying depositional subsoil. We then compared soil infiltration rates and patterns across the erosion gradient under bare soil conditions and with four perennial herbaceous species: two Poaceae (&lt;em&gt;Festuca arundinacea&lt;/em&gt; and &lt;em&gt;Bromus inermis&lt;/em&gt;) and two Fabaceae (&lt;em&gt;Medicago sativa&lt;/em&gt; L. and &lt;em&gt;Astragalus adsurgens&lt;/em&gt;). Results showed that in the absence of vegetation, intensified black soil erosion reduced infiltration rates by more than 60 % and shifted infiltration patterns from matrix flow to localized preferential flow. Notably, these preferential flow paths, initiated by unstable cracks, were transient and contributed minimally to overall infiltration. Meanwhile, vertical water infiltration was restricted, while near-surface lateral flow was enhanced, particularly under moderate erosion (10 cm black soil layer), where the effect was most pronounced. The effects of different herbaceous species on infiltration rates and water flow behavior varied depending on root morphology and erosion severity. Fabaceae species, with their well-developed taproot-lateral root systems, consistently increased infiltration rates by13.36 %‒90.91 % across all erosion levels, promoted deep water infiltration and recharge (maximum stained depth increased by &gt; 60 %), suppressed lateral flow (stained width-to-depth ratio decreased by &gt; 30 %), and significantly enhanced the development of stable preferential flow (preferential flow fraction increased by &gt; 100 %) under moderate and severe conditions. In contrast, Poaceae species, characterized by fibrous root systems, improved infiltration rates and promoted preferential flow only in non-eroded and mildly eroded soils, but their effectiveness was generally lower than that of Fabaceae. This study highlights the importance of matching plant types to erosion severity when designing vegetation-based restoration strategies for degraded black soils. Such matching is critical for effectively restoring infiltration capacity and hydrological function. These findings provide valuable insights for developing targeted soil hydrological restoration and water resource management str","PeriodicalId":12511,"journal":{"name":"Geoderma","volume":"462 ","pages":"Article 117508"},"PeriodicalIF":6.6,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The influence of abiotic (snow fences) and biotic (hedgerows) vertical structures on soil moisture, temperature, and planted seedlings in subarctic mine site reclamation","authors":"Benjamin F. Budzey ,&nbsp;Simon M. Landhäusser ,&nbsp;Katherine J. Stewart","doi":"10.1016/j.geoderma.2025.117512","DOIUrl":"10.1016/j.geoderma.2025.117512","url":null,"abstract":"<div><div>Mine site revegetation in subarctic boreal ecosystems is often limited by soil moisture under semi-arid conditions, highlighting the need for research into cost-effective, scalable strategies to manage soil–water dynamics across large-scale disturbances. The objective of this study was to evaluate the influence of vertical structure type (i.e., abiotic snow fences vs. biotic <em>Alnus viridis</em> and <em>Dryas integrifolia</em> hedgerows), height, and distance from structure on soil volumetric water content, soil temperature, and the survival and growth of planted fireweed (<em>Chamerion angustifolium</em>) and Canada bluejoint (<em>Calamagrostis canadensis</em>) seedlings at a mine site in central Yukon Territory, Canada. Despite considerable interannual variation in snowfall and spring soil moisture, abiotic structure height had limited effects on soil moisture, likely due to the small height differences between fences and shifts in dominant wind direction affecting snow-trapping efficiency. However, vertical structure type significantly affected soil moisture, especially in summer, when both hedgerows had significantly lower soil moisture compared to snow fences. Soil temperature was not influenced by the vertical structures. Planted fireweed and Canada bluejoint seedlings responded more strongly to local site conditions than to vertical structures. Overburden texture varied across the site, with sandier substrates reducing soil moisture retention across experimental blocks, which influenced hedgerow and planted seedling survival and growth. Microtopography shaped water distribution through micro-elevation differences, influencing the effects of vertical structures. These findings demonstrate the potential of vertical structures as a revegetation strategy in semi-arid subarctic boreal environments, while emphasizing the importance of integrating site-specific factors into mine reclamation planning and implementation.</div></div>","PeriodicalId":12511,"journal":{"name":"Geoderma","volume":"462 ","pages":"Article 117512"},"PeriodicalIF":6.6,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accounting for water-extractable organic phosphorus in the anion-exchange resin membrane extractions of soils","authors":"Suwei Xu ,&nbsp;Andrew J. Margenot","doi":"10.1016/j.geoderma.2025.117505","DOIUrl":"10.1016/j.geoderma.2025.117505","url":null,"abstract":"<div><div>Anion-exchange membrane (AEM) extraction is widely used to assess labile (a)biotic soil phosphorus (P) pools, but the potential of AEM extraction to quantify water-extractable organic P (H₂O-P_o) remains unclear. We (1) quantified the recovery efficiency of P_o species during AEM extraction and subsequent elution by H₂SO₄ and NaHCO₃, (2) evaluated the extent of P_o hydrolysis when (a) dissolved in H₂O, H₂SO₄, or NaHCO₃ solutions and (b) eluted from AEM, and (3) evaluated an approach to measure H₂O-P_o fraction in AEM extractions that (a) minimizes P_o hydrolysis and (b) accounts for P_o retention on AEM. The AEM extracted 29–99 % of water-soluble P_o species, meaning that total P remaining after AEM removal (H₂O_re-P_t) cannot be assumed to represent the H₂O-P_o fraction. In 24 soils spanning 12 USDA orders, combining H₂O_re-P_o and AEM extractable P_o (AEM-P_o) provided a more representative estimate of H₂O-P_o. Hydrolysis of P_o species immediately following extraction (16 h) and elution (3 h) was negligible, but increased by up to 40 % after 18 mo at 24 °C for glucose-6 phosphate (G6P), adenosine-5′-monophosphate (AMP), and phosphocholine. Elution efficiency of AEM-P_o was greater for NaHCO₃ than for H₂SO₄ for model P_o species and or soils of varying total P_o concentration. These findings clarify the limitations of using H₂O_re-P_t alone to estimate H₂O-P_o, illustrate how eluent choice affects P_o quantification via hydrolysis, and demonstrate that same-day analysis, along with combining H₂O_re-P_o and AEM-P_o fractions, is needed when quantifying soil labile P_i and P_o by AEM-based methods.</div></div>","PeriodicalId":12511,"journal":{"name":"Geoderma","volume":"462 ","pages":"Article 117505"},"PeriodicalIF":6.6,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Crab burrow morphology modulates vertical soil hydrological connectivity in saltmarshes: a field experimental study","authors":"Lumeng Xie ,&nbsp;Jiakai Liu ,&nbsp;Wenqi Zha ,&nbsp;Yi Li ,&nbsp;Matthew R. Hipsey ,&nbsp;Zhonghua Ning ,&nbsp;Mingxiang Zhang ,&nbsp;Zhenming Zhang","doi":"10.1016/j.geoderma.2025.117506","DOIUrl":"10.1016/j.geoderma.2025.117506","url":null,"abstract":"<div><div>Semi-terrestrial crabs, widely regarded as “ecosystem engineers”, play a crucial role in modifying soil environments through their daily activities in salt marshes, and thier burrows are an important component of soil biogenic structures. Understanding the distribution and morphological characteristics of these burrows is essential for quantifying their influence on soil ecological functions, and for informing effective management strategies in salt marsh ecosystems. In this study, we conducted field investigations on burrow distribution and morphological characteristics in a typical salt marsh of the Yellow River Delta, and analyzed the environmental factors influencing burrow patterns. Based on hydrological monitoring, we used a Surface water − Groundwater Coupling Index (SGCI) to quantify vertical hydrological connectivity and assessed the influence of crab burrows and soil properties on the SGCI. Results showed that crab burrow distribution exhibited spatial heterogeneity. Burrow density tended to increase with lower soil bulk density and total carbon content, and with higher soil saturated water content and vegetation density. In the supratidal zone, burrow density was lower, while burrows in the subtidal zone tended to be smaller in morphology. Total soil porosity, burrow opening diameter, burrow neck diameter, and the curved length from opening to the chamber were identified as sensitive indicators altering soil vertical hydrological connectivity. These results deepened our understanding of soil structure–function relationships, offering a valuable reference for future research on biota-environment interactions and their role in shaping salt marsh ecosystem functioning.</div></div>","PeriodicalId":12511,"journal":{"name":"Geoderma","volume":"462 ","pages":"Article 117506"},"PeriodicalIF":6.6,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of salinity on soil water vapor sorption and associated hysteresis","authors":"Fangjin Dong ,&nbsp;Xue Song ,&nbsp;Songrui Ning ,&nbsp;Emmanuel Arthur ,&nbsp;Markus Tuller ,&nbsp;Jianying Shang ,&nbsp;Xiang Wang ,&nbsp;Chong Chen","doi":"10.1016/j.geoderma.2025.117507","DOIUrl":"10.1016/j.geoderma.2025.117507","url":null,"abstract":"<div><div>The mechanisms by which soil salinity impacts on water vapor sorption behaviors are not completely clear. The study aimed to investigate the effects of natural salts on soil water vapor sorption and associated hysteresis under different <em>a</em>_w levels, and to elucidate the role of salt crystals in the water vapor adsorption and desorption process. We measured the water vapor sorption isotherms (WSIs) and physicochemical properties of seven soils with salt content (<em>Q</em>) ranging from 0.5 to 22.7 g kg⁻¹ before and after salt removal. The WSIs of low-salinity soils (<em>Q</em> &lt; 9.0 g kg⁻¹) exhibited classical Type II isotherm, but the WSIs of high-salinity soils (<em>Q</em> &gt; 15.7 g kg⁻¹) displayed atypical linear adsorption (<em>a</em>_w = ∼0.7 to ∼ 0.85) and desorption (<em>a</em>_w = ∼0.5 to ∼ 0.75) trends, deviating from Type II behavior. The presence of salts had little effect on water content at low <em>a</em>_w levels (<em>a</em>_w &lt; ∼0.4), but significantly increased water content at high <em>a</em>_w levels (adsorption: <em>a</em>_w &gt; ∼0.6; desorption: <em>a</em>_w &gt; ∼0.5). The presence of salts increased local hysteresis (<em>H</em>) across all <em>a</em>_w levels, with untreated soils exhibiting 1.3 to 6.2 times higher average <em>H</em> values than salt-removed counterparts. The maximum <em>H</em> differences for soils with <em>Q</em> &lt; 15.7 g kg⁻¹ occurred at <em>a</em>_w &gt; 0.8, while for the soil with <em>Q =</em> 22.7 g kg⁻¹, it occurred at <em>a</em>_w = 0.7. Water vapor sorption in saline and non-saline soils at low <em>a</em>_w levels was mainly through hydration interactions. The effects of salts on soil WSIs at high <em>a</em>_w levels were mainly attributed to the deliquescence of salts (sulfates and chlorides), increased electrostatic forces, and the osmotic potential generated by salt dissolution. The presence of salts amplified <em>H</em> primarily through cation hydration-dehydration asymmetry at low <em>a</em>_w levels, pore-throat blockage via capillary condensation at high <em>a</em>_w levels, and asymmetric deliquescence-crystallization thresholds in high-salinity soils.</div></div>","PeriodicalId":12511,"journal":{"name":"Geoderma","volume":"462 ","pages":"Article 117507"},"PeriodicalIF":6.6,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145045579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Toward soil health assessment through process-based modeling of ecosystem service bundles","authors":"Marialaura Bancheri ,&nbsp;Rossella Albrizio ,&nbsp;Marco Botta ,&nbsp;Alessia Perego ,&nbsp;Fabio Terribile ,&nbsp;Angelo Basile","doi":"10.1016/j.geoderma.2025.117494","DOIUrl":"10.1016/j.geoderma.2025.117494","url":null,"abstract":"<div><div>Globally, soil’s contribution to ecosystem services is integral to achieving several Sustainable Development Goals (SDGs), including food security (SDG 2), water quality (SDG 6), and climate action (SDG 13). At EU level, EU Mission “A Soil Deal for Europe” seeks to restore soil health by 2030. This study, in view of assessing soil health, introduces an integrated assessment of soil ecosystem services (SESs) using the ARMOSA process-based model. ARMOSA evaluates SESs, such as Food provisioning, Water regulation, Carbon Sequestration &amp; Climate Regulation, and Nutrient cycling, through simulations that account for diverse pedoclimatic conditions and management practices. By emphasizing multiple integrated indicators over single-point measurements, this approach captures dynamic soil-plant-atmosphere interactions, offering a nuanced framework for soil health assessment. The results demonstrate the potential of comprehensive SES evaluations to support sustainable soil management and inform strategies to meet local and global soil health goals.</div></div>","PeriodicalId":12511,"journal":{"name":"Geoderma","volume":"462 ","pages":"Article 117494"},"PeriodicalIF":6.6,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145045577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Occurrence and sources of pollutants in the soils of penguin colonies in the South Shetland Islands, North-West coast of the Antarctic Peninsula","authors":"B. Pérez-Fernández ,&nbsp;J. Caza ,&nbsp;M.C. De La Cerda ,&nbsp;A. Pérez-Alberti ,&nbsp;L. Viñas ,&nbsp;M. Oliva ,&nbsp;J. Ruíz-Fernández ,&nbsp;C. García-Hernández ,&nbsp;X.L. Otero","doi":"10.1016/j.geoderma.2025.117482","DOIUrl":"10.1016/j.geoderma.2025.117482","url":null,"abstract":"<div><div>Seabirds are considered to be biological pumps that transfer large quantities of nutrients and pollutants from the marine environment to land. This study assessed the concentrations and sources of potentially toxic trace metals and polycyclic aromatic hydrocarbons (PAHs) in penguin colonies on the South Shetland Islands. Soil samples and penguin droppings were collected from four sites on Livingston and Deception Islands. The soils were characterised by low organic carbon content, sandy texture, neutral to acidic pH and low electrical conductivity. Significant enrichment of nutrients, trace metals (e.g., P, Zn, Cu) and PAHs was observed in colony soils relative to control areas (no penguins), suggesting that penguin droppings are the main source of trace metals. PAHs had different sources: volcanic activity, biological deposition and minor human influence. Elevated levels of PAHs on Deception Island were associated with penguin droppings and past volcanic eruptions. Concentrations of PAHs do not exceed toxicity thresholds for marine organisms, while Cu and Zn contents at some locations sites exceed critical levels, suggesting potential toxicity risks at local sites, especially if these metals are leached into shallow water bodies. Ultimately, the findings establish that penguin colonies act as significant drivers in modulating the biogeochemical cycles of nutrients and contaminants within Antarctic coastal systems.</div></div>","PeriodicalId":12511,"journal":{"name":"Geoderma","volume":"461 ","pages":"Article 117482"},"PeriodicalIF":6.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Crop residues reshape microbial community composition and function across acidic soils via interactions between carbon chemistry, soil pH and nutrient availability","authors":"Wenbin Zhu ,&nbsp;Chenwei Liu ,&nbsp;Clayton R. Butterly ,&nbsp;Shuang Ouyang ,&nbsp;Lianghu Su ,&nbsp;Longjiang Zhang ,&nbsp;Lei Wang","doi":"10.1016/j.geoderma.2025.117496","DOIUrl":"10.1016/j.geoderma.2025.117496","url":null,"abstract":"<div><div>There is a significant gap in understanding how crop residues with varying carbon-to-nitrogen (C/N) ratios mitigate soil acidification in acidic soils, particularly considering the complex interplay between soil C chemistry, pH, nutrient dynamics, and their subsequent effects on microbial community composition and enzymatic activities. Here, a 65-day incubation experiment was conducted using four crop residues with varying C/N ratio (rapeseed cake 7.6; peanut straw 27.0; rice straw 48.6 and wheat straw 93.6), aiming to fill these knowledge gaps in the two typical acidic long-term tea garden soils. Results showed that the incorporation of crop residues significantly enhanced edaphic characteristics and mitigated soil acidification. In strongly acidic soil (pH 4.12), rapeseed cake increased SOC recalcitrance, while promoting SOC decomposition in slightly acidic soil (pH 4.75). Furthermore, residue incorporation markedly altered microbial community composition, notably reducing fungal-to-bacterial and G⁺-to-G⁻ ratios in slightly acidic soil. Soil C chemistry, the primary factor, interacting with pH and nutrients influenced microbial composition and enzymatic activities. Specifically, in strongly acidic soils, microbial composition was determined by the interaction of pH and C chemistry, whereas in slightly acidic soils, it was driven by the interaction between C chemistry and phosphorus content. Correspondingly, enzyme activities were influenced by the interaction of C chemistry with phosphorus in the former soils and nitrogen in the latter soils. Overall, our findings confirm the importance of rapeseed cake in enhancing soil multifunctionality, especially in strongly acidic soil, and highlight the critical role of C chemistry, soil pH, and nutrient interactions in shaping microbial composition and function in acidic soils.</div></div>","PeriodicalId":12511,"journal":{"name":"Geoderma","volume":"461 ","pages":"Article 117496"},"PeriodicalIF":6.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}