Soil Biology & Biochemistry最新文献

{"title":"Large underestimations of warming-induced soil carbon emissions from oversimplistic Q10 indicator","authors":"Gabriel Y.K. Moinet, Karen Morán-Rivera, Antoine Moinet, Alexandre M.J.-C. Wadoux","doi":"10.1016/j.soilbio.2025.109839","DOIUrl":"https://doi.org/10.1016/j.soilbio.2025.109839","url":null,"abstract":"The sensitivity of soil microbial respiration to climate warming is a major source of uncertainty in predicting soil carbon (C) emissions to the atmosphere and their feedback to climate change. One key issue is the persistent misuse of <em>Q</em>₁₀, the factor by which respiration rate is multiplied for a 10^oC increase in temperature, as an indicator of the temperature sensitivity. Despite ample empirical and theoretical evidence that <em>Q</em>₁₀ is temperature-dependent, most publications on the topic continue to measure and conceptualise <em>Q</em>₁₀ as being independent of temperature. Here, we analyse a published dataset of temperature incubations of soil microbial respiration across a global latitudinal gradient and project the resulting sensitivities onto global maps under four climate change scenarios. We reveal that omitting to account for the temperature dependence of <em>Q</em>₁₀ leads to an underestimation of global soil C emissions from 2015 to 2100 ranging from 5.5 ± 2.4 PgC to 10.4 ± 6.9 PgC across different climate change scenarios. Moreover, beyond uncertainties in predictions of global soil C emissions, modelling inaccuracies are geographically skewed, with large underestimations at high latitudes (of up to 34 MgC ha^-1) and overestimations in warmer regions (of up to 12 MgC ha^-1). The disparate regional patterns have large implications for land stewardship, as management efforts could overlook soil C losses in vulnerable septentrional areas while unnecessary interventions could be recommended in tropical regions where soil C sequestration may not be as pressing.","PeriodicalId":21888,"journal":{"name":"Soil Biology & Biochemistry","volume":"7 1","pages":""},"PeriodicalIF":9.7,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143880787","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":"Enhanced understanding of soil methane processes through modeling microbial kinetics and taxonomy","authors":"Shuhao Zhou ,&nbsp;Gangsheng Wang ,&nbsp;Wenjuan Huang ,&nbsp;Kefeng Wang ,&nbsp;Liping Zhang ,&nbsp;Zehao Lv ,&nbsp;Yajing Han ,&nbsp;Shanshan Qi ,&nbsp;Wei Zhang ,&nbsp;Daifeng Xiang ,&nbsp;Steven J. Hall","doi":"10.1016/j.soilbio.2025.109838","DOIUrl":"10.1016/j.soilbio.2025.109838","url":null,"abstract":"<div><div>Soil methane (CH₄) emissions significantly impact climate change. However, microbial controls of CH₄ in global carbon cycle gain less attention than CO₂, hindering the understanding of CH₄ processes. Here, stemming from a baseline model (MENDmm1) with one microbial group, we developed a microbial-explicit CH₄ model by representing six microbial groups following Michaelis-Menten kinetics (MENDmm6). We compared MENDmm6 with MENDfo6 (first-order kinetics) and MENDmm5 (excluding syntrophic acetate oxidation, SAO), alongside MENDmm1. Split-sample calibration and validation were conducted using high-temporal-resolution CO₂ and CH₄ effluxes from two soils (Oxisol and Mollisol) under five oxygen-fluctuation treatments. MENDmm6 (mean <em>R</em>² = 0.66) improved CH₄ modeling by 47 % over MENDmm1 (mean <em>R</em>² = 0.45), with a 15 % improvement for CO₂. MENDmm6-simulated methanogenic and methanotrophic biomass closely matched observed OTU abundances (<em>r</em> = 0.69–0.94), except for methanotrophs in the Oxisol (<em>r</em> = 0.13). Furthermore, including microbial processes without explicit microbial kinetics (MENDfo6) did not improve model performance over MENDmm1. Neglecting SAO in MENDmm5 failed to explain the observed hydrogenotrophic methanogenesis dominance. Our results emphasize the significance of explicit microbial communities and kinetics in CH₄ modeling. The proposed MENDmm6 model, leveraging molecular measurements of CH₄-cycling microbes, will enhance predictions of management impacts on CH₄ emissions, crucial for climate mitigation.</div></div>","PeriodicalId":21888,"journal":{"name":"Soil Biology & Biochemistry","volume":"207 ","pages":"Article 109838"},"PeriodicalIF":9.8,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875756","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":"Maize roots modulate microbial functional traits in the rhizosphere to mitigate drought stress","authors":"María Martín Roldán, Henrike Würsig, Mika T. Tarkka, Roman P. Hartwig, Monika A. Wimmer, Evgenia Blagodatskaya","doi":"10.1016/j.soilbio.2025.109837","DOIUrl":"https://doi.org/10.1016/j.soilbio.2025.109837","url":null,"abstract":"Drought affects soil C sequestration by altering the availability of nutrients to plants and microorganisms. However, the mechanisms of plant-microbe interactions and the potential role of root hairs, which enlarge the root-soil interface, in maintaining rhizosphere processes under drought remain uncertain. We investigated the effect of a 7-day drought on root gene expression in two maize plants, a root hair-deficient mutant and its corresponding wild-type, and its correlation with rhizosphere functions: microbial growth and enzyme kinetics related to organic matter decomposition. Under drought, roots reduced the expression of several <em>chitinase</em>, <em>acid phosphatase</em> and pathogenesis-related genes. In parallel, drought reduced the maximum enzymatic rate of β-glucosidase and acid phosphatase by 3.5- and 1.9-fold, respectively, while the affinity of these enzymes in the rhizosphere increased by 35 and 71 %, respectively, compared to the well-watered treatment. The effect of drought was more pronounced in the rhizosphere of wild-type maize than in that of the mutant. Notably, leucine aminopeptidase and N-acetylglucosaminidase did not respond to drought. Inhibition by high substrate concentrations was observed for β-glucosidase and acid phosphatase only under drought, highlighting the potential use of the substrate inhibition model as a complementary indicator of altered enzyme systems in response to environmental regulators. Finally, drought prolonged the microbial lag phase by up to 24 hours and reduced the microbial specific growth rate by up to 36 % compared to the well-watered treatment. The maximum specific growth rate recovered after rewetting of the soil, demonstrating the sustainability of microbial function after a short-term drought.","PeriodicalId":21888,"journal":{"name":"Soil Biology & Biochemistry","volume":"108 1","pages":""},"PeriodicalIF":9.7,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862403","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":"Ecological traits of high-affinity hydrogen-oxidizing soil bacteria involved in the hydrogen cycle","authors":"Lijun Hou ,&nbsp;Joann K. Whalen ,&nbsp;Philippe Constant","doi":"10.1016/j.soilbio.2025.109831","DOIUrl":"10.1016/j.soilbio.2025.109831","url":null,"abstract":"<div><div>Every year, soil microbial-mediated hydrogen (H₂) oxidation removes about 80 % of the global atmospheric H₂, an indirect greenhouse gas. Soil-dwelling high-affinity H₂ oxidizing bacteria use this trace gas as an energy source to persist when other substrates are limited or to meet their maintenance energy requirements during dormancy. However, there is limited knowledge of the distribution, composition, diversity, and functions of this group of bacteria, particularly their ecological traits (i.e., characteristics that influence their interactions with the environment and other organisms). This is because the high-affinity H₂-oxidizing bacteria are not phylogenetically conserved, potentially due to the horizontal transfer of their functional gene, which still needs to be demonstrated. This makes it difficult to answer ecological questions related to the distribution, functional role, and ecological contribution of H₂-oxidizing bacteria in the soil H₂ cycle, as well as their responses to environmental factors. Such information is needed to estimate the contribution of the H₂-oxidizing bacteria to the global H₂ cycle. Although many H₂-oxidizing bacteria are not culturable, they may share similar ecological traits when responding to environmental changes, such as pH, moisture content, and H₂ concentrations. Therefore, a community or guild-level trait-based approach (defined as the analysis of functional traits shared by groups of bacteria (guilds) that perform similar ecological roles) could be useful to synthesize complex genomic and phylogenetic information. This review discusses the impact of soil environmental factors on soil H₂ uptake (by oxidation), and identifies ecological response traits under controlled conditions. Our approach connects the biological activity of the H₂-oxidizing bacteria to their resident environment, for scaling up and estimating the capacity of soil microbial communities to mitigate global warming linked to increased atmospheric H₂.</div></div>","PeriodicalId":21888,"journal":{"name":"Soil Biology & Biochemistry","volume":"207 ","pages":"Article 109831"},"PeriodicalIF":9.8,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143857801","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":"High soil salinity reduces straw decomposition but primes soil organic carbon loss","authors":"Mengmeng Chen ,&nbsp;Yakov Kuzyakov ,&nbsp;Jie Zhou ,&nbsp;Kazem Zamanian ,&nbsp;Shang Wang ,&nbsp;Khatab Abdalla ,&nbsp;Jing Wang ,&nbsp;Xiaobin Li ,&nbsp;Haoruo Li ,&nbsp;Hongyuan Zhang ,&nbsp;Kevin Z. Mganga ,&nbsp;Yuyi Li ,&nbsp;Evgenia Blagodatskaya","doi":"10.1016/j.soilbio.2025.109835","DOIUrl":"10.1016/j.soilbio.2025.109835","url":null,"abstract":"<div><div>Straw incorporation is a widely recommended agronomic practice to increase organic carbon (C) in saline soil. The mechanism of straw induced priming effect (PE) on soil organic matter (SOM) decomposition is likely to be influenced by salinity, which may stimulate microbial processes and enzyme activity because of osmotic stress and nutrient resource limitation. We incubated ¹³C-labeled straw in soil for 90 d under three salinity levels: low electrical conductivity (EC_1:5) of 0.31 dS m⁻¹, medium EC_1:5 of 0.97 dS m⁻¹, and high EC_1:5 of 1.6 dS m⁻¹). During the first 15 d, the low salinity soil had 31 % greater PE than the high salinity soil, apparently due to microbial preference for labile straw-derived C over SOM under negligible osmotic stress. This trend was reversed from day 30 onward, with medium-and high-salinity soil showing amplified PE (1.1-fold and 1.7-fold increase respectively versus low-salinity control), associated with microbial N limitation (inorganic N dropped more than 16 %) and dominance of copiotrophic taxa: Proteobacteria, Bacteroidota, Ascomycota. High salinity decreased microbial biomass and diversity, and slowed down straw decomposition, which lowered necromass by 13 % and increased plant-derived C by 6.9 % compared to low soil salinity. Quantitative modeling demonstrated linear salinity effects on C cycling - each 1 dS m⁻¹ increase in soil EC_1:5 amplified the annual PE by 930 mg C kg⁻¹ soil year⁻¹ and reduced the net C balance by 3.8 g C kg⁻¹ soil. Therefore, high soil salinity enhances SOM loss, while increase in straw-derived C primarily comes from plant-derived C rather necromass C. Our findings make the connection between soil salinity and C dynamics in straw-remediated saline soil, which is linked to the C sequestration potential of saline lands.</div></div>","PeriodicalId":21888,"journal":{"name":"Soil Biology & Biochemistry","volume":"207 ","pages":"Article 109835"},"PeriodicalIF":9.8,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143849372","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":"Belowground plant carbon and nitrogen exchange: plant-derived carbon inputs and pore structure formation","authors":"Jin Ho Lee ,&nbsp;Tayler C. Ulbrich ,&nbsp;Maxwell Oerther ,&nbsp;Yakov Kuzyakov ,&nbsp;Andrey K. Guber ,&nbsp;Alexandra N. Kravchenko","doi":"10.1016/j.soilbio.2025.109833","DOIUrl":"10.1016/j.soilbio.2025.109833","url":null,"abstract":"<div><div>Belowground plant transfer of carbon (C) and nitrogen (N) can benefit soil ecosystems, increasing soil C gains and plant N availability, while improving soil pore structure. We explored such transfers among three plant species of North American prairie, where C and N were transferred from a grass (<em>Panicum virgatum</em> L., switchgrass (Sgrass)) to either a legume (<em>Lespedeza capitata</em> Michx., bush clover (Bclover)), a forb (<em>Rudbeckia hirta</em> L., black-eyed Susan (BSforb)), or a mixture of the two. The plants were grown either with/out direct root contact, thus allowing assessment of the relative contributions of fungal- and root-based transfer pathways. The Sgrass was labeled with ¹³C and ¹⁵N, and C and N transfers were assessed by measuring isotope enrichment of roots and aboveground biomass of neighboring plants. Soil inputs of plant-derived C and N were assessed by isotope analyses of the rhizosphere soil. X-ray computed tomography was used for pore structure analyses. Carbon transfer was much higher in the presence of direct/close root contact between source and recipient plants, yet N transfers appeared to be mainly fungal driven. While C and N were readily transferred from Sgrass to other Sgrass and Bclover neighbors, transfers to BSforb were negligible. However, in a three species system, the presence of the legume enhanced C and N transfers to BSforb, suggesting non-additive influences of diverse plant community composition. The more plant-derived C and N was found in the rhizosphere of recipient plants, the greater C and N transfers through roots. Greater C and N transfers were associated with increases in 8–30 μm diameter pores and decreases in &gt;150 μm pores. Summarily, diverse plant communities, especially those with legumes, increase C and N transfers, which then benefit soil C inputs and its protection via changes in pore structure.</div></div>","PeriodicalId":21888,"journal":{"name":"Soil Biology & Biochemistry","volume":"207 ","pages":"Article 109833"},"PeriodicalIF":9.8,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143849400","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":"Intracellular carbon storage of microorganisms and resulting C sequestration in biosolids-amended agricultural soil","authors":"Guanglong Tian,&nbsp;Olawale Oladeji,&nbsp;Benjamin Morgan,&nbsp;Essam El-Naggar,&nbsp;Albert Cox,&nbsp;Heng Zhang,&nbsp;Edward Podczerwinski","doi":"10.1016/j.soilbio.2025.109836","DOIUrl":"10.1016/j.soilbio.2025.109836","url":null,"abstract":"<div><div>To advance our understanding of how biosolids drive soil microorganisms to contribute to carbon sequestration in agricultural soil, we quantified microbial intracellular C storage using neutral lipid fatty acids (NLFA), microbial structural biomass using phospholipid fatty acids (PLFA), and soil C sequestration by analyzing soil organic C (SOC) changes. Soil samples were collected in 2024 and several other years since 2008 in Fulton County, western Illinois, in six agricultural fields treated with biosolids (1972–1984) at 550 Mg ha⁻¹ cumulatively, five control fields received agronomic rates of chemical fertilizer, and one reference field (the highest SOC in the region). Biosolids-amended soil showed a higher NLFA per unit of PLFA (NLFA/PLFA ratio) than conventional fertilizer soil, especially for bacteria, indicating higher microbial intracellular C storage as NLFA in biosolids-amended soil. In particular, the NLFA/PLFA ratio was almost fourfold higher for Actinomycetes markers, threefold higher for Gram+ bacteria, and twofold higher for Gram- bacteria in biosolids-amended soil than in conventional fertilizer soil. Bacteria in biosolids-amended soil were evidently better supported with higher active SOC and water-holding capacity than in conventional fertilizer soil. The new SOC equilibrium 40 years after the last biosolids application was 3.18 ± 0.08 % in biosolids-amended soil, 1.26 ± 0.02 % in conventional fertilizer soil, and 2.24 ± 0.07 % in reference soil. Resulting mean net soil C sequestration in response to biosolids application was 37.1 ± 4.2 Mg ha⁻¹ compared to 3.9 ± 0.2 Mg ha⁻¹ in conventional fertilizer soil. Greenhouse gas emission reduction by biosolids application was estimated to be on average 0.59 Mg CO₂-equivalent Mg biosolids⁻¹. Microbes associated with biosolids addition have the potential to improve SOC levels for agricultural soil C sequestration via their superior NLFA intracellular storage potential.</div></div>","PeriodicalId":21888,"journal":{"name":"Soil Biology & Biochemistry","volume":"207 ","pages":"Article 109836"},"PeriodicalIF":9.8,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143849399","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":"Soil microbial community structure and function in non-target and plant-influenced soils respond similarly to nitrogen enrichment","authors":"Lori A. Biederman ,&nbsp;Brent Mortensen ,&nbsp;Lauren Sullivan ,&nbsp;W. Stanley Harpole","doi":"10.1016/j.soilbio.2025.109830","DOIUrl":"10.1016/j.soilbio.2025.109830","url":null,"abstract":"<div><div>Plants rely on soil microbes, particularly those in their rhizosphere to access resources; however, these relationships are altered following disturbance, including nutrient enrichment. Plants also contribute to variation in resource availability by redirecting exudates as conditions change, but the ability to do this varies with species identity. In this study we compared the activity and composition of soil communities following nitrogen fertilization (10 g⁻¹ m⁻²) beneath plants in general (H1) and between <em>Ratibida pinnata</em> and <em>Schizachyrium scoparium</em> specifically (H2). We expected that the microbial structure and function would reflect the relatively C-rich environment of root rhizospheres under control conditions, but that N fertilization would homogenize microbial community composition and activity. Although several variables responded to either fertilization or plant input, we found few interactions between sample location and fertilization, which would indicate support for our hypotheses. For H1, which compared fertilization effects between bulk soil and plants generally, fertilization increased β-1,4-N acetylglucosaminidase activity in the plant-influenced soils, indicating that these rhizosphere microbes had reduced availability of labile carbon plant exudates compared with unfertilized plant rhizospheres. Furthermore, the higher ratio of Gram-positive to Gram-negative bacteria found in the unfertilized non-target condition suggests that the combination of low nitrogen and carbon resources of the bulk soil was uniquely stressful compared to other conditions. For H2, which compared the two plant species following fertilization, we found a reduced PLFA Metabolic Stress Index in the unfertilized rhizosphere of <em>R. pinnata</em>, which indicates a greater influx of labile carbon to these microbes. <em>R. pinnata</em> also maintained its relative cover with fertilization, indicating flexibility in reallocating resources, while relative cover of <em>S. scoparium</em> decreased. These plant-soil interactions occur within small volumes of soil yet scale to affect regional and global biogeochemical cycles and biodiversity. Although we found limited support for our hypotheses it is critical that we continue to study these processes to understand changes to our environment.</div></div>","PeriodicalId":21888,"journal":{"name":"Soil Biology & Biochemistry","volume":"207 ","pages":"Article 109830"},"PeriodicalIF":9.8,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143849452","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":"Enhancing soil C sequestration through organic matter recycling: A comparative study of paddy and upland fields","authors":"Hyeon Ji Song ,&nbsp;Sihyun Park ,&nbsp;Na-Hyun Kwon ,&nbsp;Andrew J. Margenot ,&nbsp;Jeong-Gu Lee","doi":"10.1016/j.soilbio.2025.109834","DOIUrl":"10.1016/j.soilbio.2025.109834","url":null,"abstract":"<div><div>Winter cover crops are expected to increase soil organic C (SOC) stocks, but the magnitude of SOC gain could be greater in paddy fields where decomposition is constrained by anaerobic soil conditions, compared to upland fields. This study examines the impact of winter cover crop recycling on SOC accumulation over two years in South Korea. Plots were established in a rice paddy field and a nearby upland maize field, and each field was fertilized with organic or chemical inputs. In chemical treatments, where no cultivation occurred during winter, synthetic fertilizers (NPK) were applied at recommended doses for rice and maize. In organic treatments, barley and hairy vetch were grown during the winter fallow season and terminated by incorporation as organic amendments in the warm cropping season, prior to planting the annual rice or maize crop. Compared with chemical treatments, no significant effect of organic treatments on grain productivity was observed. However, organic treatments increased net primary production (NPP) by 46–81 %, regardless of field conditions. The higher C inputs with organic amendments were accompanied by greater C respiration—63–73 % more in paddy fields and 15–39 % higher in upland fields—than with synthetic fertilizer. Net ecosystem carbon balance (NECB) increased by 343–347 % in paddy fields and 15–39 % in upland fields under organic amendments. Consequently, rice paddy fields with organic amendments had an annual C accumulation of 1773–2168 kg C ha⁻¹. Conversely, despite extensive recycling of winter cover crops, maize cultivated in upland fields still experienced an annual net C loss of 4663–7789 kg C ha⁻¹. Recycling organic residues as a C source in rice paddy fields promotes SOC stock accumulation in temperate regions. Conversely, in maize upland fields, where organic plant recycling alone is insufficient for C sequestration, incorporating additional biomass, such as maize stover, is essential to offset the net SOC loss.</div></div>","PeriodicalId":21888,"journal":{"name":"Soil Biology & Biochemistry","volume":"207 ","pages":"Article 109834"},"PeriodicalIF":9.8,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143846447","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":"Whole soil warming promotes surface soil carbon loss but deep soil carbon gain, depending on land management practices in temperate climate","authors":"Md. Zulfikar Khan ,&nbsp;Abad Chabbi ,&nbsp;Axel Felbacq ,&nbsp;Gabin Piton ,&nbsp;Isabelle Bertrand ,&nbsp;Pierre-Alain Maron ,&nbsp;Cornelia Rumpel","doi":"10.1016/j.soilbio.2025.109832","DOIUrl":"10.1016/j.soilbio.2025.109832","url":null,"abstract":"<div><div>The impact of management practices on the response of biogeochemical cycles to soil warming remains poorly understood. This study aimed to investigate (1) the effects of warming on soil organic carbon (SOC) and nitrogen (N) storage across soil profiles in cropland and grassland and (2) the microbial metabolism involved in these processes. To achieve these objectives, we conducted an <em>in-situ</em> soil warming experiment (+4°C) down to 1.0-m depth in an agricultural Cambisol in Lusignan, France. We analyzed soil microbial community composition using ester-linked fatty acid methyl ester (EL-FAME) profiling and measured extracellular enzyme activities related to SOC and nutrient cycling under both land management practices.</div><div>Our results indicated that three years of soil warming had no effect on SOC and N stocks in grassland soils across the profile. In contrast, cropland surface soils (0-15 cm) showed an 18.1% and 15.0% decrease in SOC and N stocks, respectively, while deeper layers (70–90 cm) exhibited an 86.7% and 68.8% increase. These shifts in SOC and N stocks corresponded with changes in extracellular enzyme activities (C- and N-acquisition), eco-enzymatic stoichiometry, and bacterial community composition. Additionally, warming led to a slight decrease in aboveground biomass production in cropland. Furthermore, microbial biomass and community composition in surface soil exhibited management-specific responses to warming. Overall, our findings suggest that the effect of warming on SOC and N stocks depends on both soil depth and land management. Consequently, agricultural management practices could regulate SOC responses to warming by altering carbon inputs into the soil system, with implications for microbial community composition and activity.</div></div>","PeriodicalId":21888,"journal":{"name":"Soil Biology & Biochemistry","volume":"207 ","pages":"Article 109832"},"PeriodicalIF":9.8,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143849401","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}