Applied Soil Ecology最新文献

{"title":"Compost and vermicompost improve symbiotic nitrogen fixation, physiology and yield of the Rhizobium-legume symbiosis: A systematic review","authors":"Carol V. Amaya-Gómez ,&nbsp;Diego H. Flórez-Martínez ,&nbsp;María Luz Cayuela ,&nbsp;Germán Tortosa","doi":"10.1016/j.apsoil.2025.106051","DOIUrl":"10.1016/j.apsoil.2025.106051","url":null,"abstract":"<div><div>Compost and vermicompost are valuable sources of organic matter, nutrients and beneficial microorganisms for plants. Both improve the physical and chemical properties of soil and stimulate its biological processes, such as beneficial interactions between soil microorganisms and plants. One example is the symbiosis between legumes and rhizobia. A systematic review of the existing scientific literature was conducted to assess the effects of compost and vermicompost on symbiotic nitrogen fixation. The collected information and data were subsequently used for scientometrics and meta-analysis. Variance, effect size and percentage change from a control without compost or vermicompost were analysed. The scientometrics analysis revealed promising research areas including, the study of the effects of compost and vermicompost combined with rhizobia on plant physiology, nitrogen fixation, soil quality, economic benefits, microbial diversity and salinity stress. The combined use of compost and biochar emerged as the most recent research trend. Other relevant topics included the economic benefits, and environmental sustainability impacts of compost and legumes for improving soil quality and nitrogen availability. The meta-analysis showed that compost application, on average, increased nodule number by 66 %, nodule fresh weight by 52 %, plant biomass by 48 %, plant height by 21 % and yield by 20 %. Vermicompost application led to greater values in these parameters. Some scientific gaps have been addressed as: i) the effectiveness of compost at inducing nodule formation when inoculated with microbial inoculants, considering the legume species and the edaphoclimatic conditions of the experiment, ii) the effects of biochar and compost on nodulation improvement in legumes, and iii) the effect of the chemical and biological characteristics of compost (or vermicompost), especially nitrogen content or raw nitrogen-fixing bacteria present in compost in the Rhizobium-legume symbiosis. All these results confirm that using compost or vermicompost in the cultivation of legume crops is a valuable approach to increase soil fertility, crop productivity and agricultural sustainability.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"210 ","pages":"Article 106051"},"PeriodicalIF":4.8,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725174","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":"Deciphering drought adaptation in Eucommia ulmoides: From the rhizosphere microbiota to root metabolites","authors":"Xueqian Zhang,&nbsp;Shuangshuang Hou,&nbsp;Xinyu Ma,&nbsp;Chenglong Li,&nbsp;Qingsong Ran,&nbsp;Yanfeng Han,&nbsp;Chunbo Dong","doi":"10.1016/j.apsoil.2025.106064","DOIUrl":"10.1016/j.apsoil.2025.106064","url":null,"abstract":"<div><div>Rapid global climate change has made drought stress a significant limiting factor for plant growth and productivity. While the effects of drought on plant metabolism and the rhizosphere microbiota are well-documented, our understanding of their dynamically interplay and potential synergies in enhancing plant adaptability during droughts is incomplete. Herein, using <em>Eucommia ulmoides</em> as a model system under drought stress and integrating metagenomic sequencing, untargeted metabolomics, and plant physiological assessments, We found that drought altered the root metabolites profile of <em>E.ulmoides</em>, notably enriching the flavonoid 6”-O-Acetylgenistin. Additionally, the co-occurrence network of rhizosphere microbiota shifted dynamically under drought, with core taxa including <em>Bordetella</em>, <em>Janthinobacterium</em>, <em>Methylobacter</em>, <em>Noviherbaspirillum</em>, <em>Pseudomonas</em>, <em>Acidovorax</em>, <em>Variovorax</em>, and the rare taxa <em>Tindallia</em> showing significant correlations with soluble sugars (SS), as was the key metabolite 6”-O-Acetylgenistin. Collectively, root metabolites and core rhizosphere taxa influence plant functional traits, enhancing the plant's adaptability to drought stress. These findings offering novel insights into strategies to increase plant adaptation during droughts.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"210 ","pages":"Article 106064"},"PeriodicalIF":4.8,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725159","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":"Fenton technology optimization for polycyclic aromatic hydrocarbons degradation in soil","authors":"Luan Zhou,&nbsp;Tongxin Wang,&nbsp;Weijie Song,&nbsp;Wanting Ling,&nbsp;Xuwen Chen","doi":"10.1016/j.apsoil.2025.106059","DOIUrl":"10.1016/j.apsoil.2025.106059","url":null,"abstract":"<div><div>An effective Fenton oxidation technology was developed to degrade PAHs in the soil, and fluorene (FLU), phenanthrene (PHE), fluoranthene (FLA) and pyrene (PYR) were selected as primary pollutants. This research presented a systematic approach to optimize the key operational parameters, such as reaction time, H₂O₂ concentration, Fe²⁺/H₂O₂ addition ratio, pH value, and soil-water ratio, those factors altogether affected the generation of ^•OH and the overall degradation efficiency of PAHs. The optimized parameter combination of Fenton technology suitable for PAHs degradation in complex soil environments was proposed. The key parameters were as follows: soil-water ratio was 2:1, pH was 3, H₂O₂ concentration was 11 % of the total system, Fe²⁺/H₂O₂ addition ratio was 1/8, and reaction time was 24 h. The degradation percentages for FLU, PHE, FLA and PYR were 75.4 %, 66.2 %, 60.8 % and 93.7 % in this optimized system, respectively. As the reaction time increased, the degradation efficiency of PAHs by Fenton technology reached the maximum until it became stable or slightly decreased. Appropriate H₂O₂ concentration and Fe²⁺/H₂O₂ addition ratio were conducive to the maximum generation of ^•OH, thus improving the degradation efficiency of PAHs. The pH value significantly influenced the degradation of PAHs, and the soil-water ratio had important effects on the Fenton oxidation process. By optimizing these conditions, a more thorough and profound assessment of the Fenton technology's applicability in treating actual-world PAHs-polluted soils was achievable, and it was expected to reduce the restoration cost. Meanwhile, it also contributed to the development of more efficient and sustainable soil remediation strategies.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"210 ","pages":"Article 106059"},"PeriodicalIF":4.8,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725175","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 fertilization legacy effects and temperatures regulate soil microbial function of crop straw decomposition in a greenhouse vegetable field","authors":"Long Ma ,&nbsp;Dongming Wu ,&nbsp;Ruonan Li ,&nbsp;Haoan Luan ,&nbsp;Jiwei Tang ,&nbsp;Liying Wang ,&nbsp;Tengfei Guo ,&nbsp;Chao Ai ,&nbsp;Shaowen Huang","doi":"10.1016/j.apsoil.2025.106056","DOIUrl":"10.1016/j.apsoil.2025.106056","url":null,"abstract":"<div><div>Straw returned into field is a crucial practice for improving soil carbon sequestration and crop productivity. However, it remains unknow how fertilization legacy effects with different nitrogen (N) forms regulate the microbial communities and genes of straw decomposition under global warming. This study analyzed soils with 12 years of four fertilization regimes, including chemical-fertilizer-N (CF), 2/4 chemical-fertilizer-N + 2/4 manure-N (CM), 2/4 chemical-fertilizer-N + 2/4 maize-straw-N (CS), and 2/4 chemical-fertilizer-N + 1/4 manure-N + 1/4 maize-straw-N (CMS). Soils with ¹³C-labeled maize straw were incubated at 15, 25, and 35 °C, and microbial function involved in straw decomposition and nutrient stoichiometric mechanisms were explored using DNA-SIP combined with metagenomics analysis. Results showed that organic-materials N treatments, especially straw-amended N treatments (CMS and CS), improved cellulose decomposition by increasing β-glucosidase genes whereas decreasing endoglucanase and cellobiohydrolase genes. Organic-materials N treatments promoted hemicellulose degradation by increasing xylanase gene expression. Straw-amended N treatments facilitated lignin degradation by upregulating oxidase genes. These positive legacy effects were amplified with elevated temperatures and could be attributed to heterogeneity in straw-decomposing communities. Specifically, the abundance of <em>Gemmatimonadetes</em> and <em>Betaproteobacteria</em> increased with incubation temperature increased, whereas <em>Alphaproteobacteria</em> and <em>Actinomycetia</em> decreased. Organic-materials N treatments, especially straw-amended N treatments, increased the relative abundance of <em>Actinomycetia</em>, <em>Gammaproteobacteria</em>, and <em>Gemmatimonadetes</em> by 2.8 %, 2.7 %, and 39.7 % on average, respectively. Mantel's test further indicated that soil TOC, DOC, MBC, and C/N at different temperatures significantly promoted straw decomposition, with TN and C/P ratio being particularly influential at low and high temperatures, respectively. In conclusion, N fertilization modifies microbial communities and genes involved in straw decomposition through nutrient stoichiometry regulation. The rise in temperature decouples these relationships, highlighting the significance of applying organic-fertilizer-N to improve straw decomposition under global warming.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"210 ","pages":"Article 106056"},"PeriodicalIF":4.8,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725160","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":"Distinct assembly mechanisms of the abundant and rare bacterial taxa in plateau habitats","authors":"Xiaojie Wang,&nbsp;Hefa Cheng","doi":"10.1016/j.apsoil.2025.106053","DOIUrl":"10.1016/j.apsoil.2025.106053","url":null,"abstract":"<div><div>The ecological assembly mechanisms that dominate the distribution of microbial taxa across diverse plateau habitats have been poorly understood. The current study aimed to examine the distribution patterns of the conditionally rare or abundant taxa (CRAT), conditionally rare taxa (CRT), and always rare taxa (ART) in the bacteria from distinct types of plateau habitats, including wetland, forest, and desert soils, and lake sediments, on the Qinghai-Tibetan Plateau, and to elucidate the underlying assembly mechanisms. The results revealed that the assembly of CRAT between lake sediments and soils was primarily governed by heterogeneous selection with salinity serving as the key environmental driver. The assembly process of CRT between different types of habitats was dominated by dispersal limitation, whereas there was no dominant ecological process for the assembly of ART. In addition, the topological characteristics of co-occurrence networks indicated that there was a closer and more complex bacterial interaction in the forest soils than in the other habitats. Furthermore, the presence of CRT and the interactions among different bacterial taxa appeared to be key drivers in the organization and dynamics of the bacterial taxa within co-occurrence networks. Collectively, these results provide important insights on the ecological assembly mechanisms and microbial associations across diverse plateau habitats.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"209 ","pages":"Article 106053"},"PeriodicalIF":4.8,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706513","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":"Tobacco black shank disease significantly affects the composition and assembly of the genotype-associated microbial community in the rhizosphere","authors":"Qipeng Jiang ,&nbsp;Jiamin Yu ,&nbsp;Min Mao ,&nbsp;Lianqiang Jiang ,&nbsp;Fangfang Yan ,&nbsp;Ruiyu Yang ,&nbsp;Minfeng Yang ,&nbsp;Chengzhi Weng ,&nbsp;Shiping Guo ,&nbsp;Dongyang Liu ,&nbsp;Xiangwen Yu ,&nbsp;Quan Deng ,&nbsp;Gang Long ,&nbsp;Shuhong Chen ,&nbsp;Yingjie Zhang ,&nbsp;Ying Liu ,&nbsp;Yong Wang ,&nbsp;Wei Ding","doi":"10.1016/j.apsoil.2025.106039","DOIUrl":"10.1016/j.apsoil.2025.106039","url":null,"abstract":"<div><div>Tobacco black shank (TBS) disease is a soil-borne disease, and it is associated with the microbial community in the rhizosphere. However, the influence of tobacco genotype and TBS disease on the rhizospheric microbiome remains unknown. In this study, we investigated the severity of TBS disease, and characterized the rhizospheric bacterial and fungal community compositions of four tobacco varieties, including ZC208, YY87, YY85 and HD. The results showed that TBS disease drove the transformation of microorganisms from bacteria-dominated to fungi-dominated, and TBS disease increased the prevalence of beneficial microbiomes in the tobacco rhizosphere. Moreover, the influence of TBS disease on the rhizospheric microorganisms of resistant tobacco was lower than that on susceptible tobacco. Specifically, our findings suggested <em>Taibaiella</em>, <em>Gemmatimonas</em>, <em>Rhodopirellula</em>, <em>Terrimonas</em> and <em>Lysobacter</em> potential suppression roles of TBS disease, and <em>Ensifer</em> and <em>Methanobacterium</em> may play promoting roles in TBS disease progression. Our findings enhance the understanding of the microbial-mediated mechanism of TBS disease and provide novel insight for developing underlying microbial antagonists to manage soil-borne diseases.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"209 ","pages":"Article 106039"},"PeriodicalIF":4.8,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards distinguishing biotic and abiotic contributions to phenol oxidase activity: Current understanding and future perspective","authors":"Taiki Mori ,&nbsp;Senhao Wang ,&nbsp;Cong Wang ,&nbsp;Wei Zhang ,&nbsp;Jiangming Mo","doi":"10.1016/j.apsoil.2025.106047","DOIUrl":"10.1016/j.apsoil.2025.106047","url":null,"abstract":"<div><div>Phenol oxidase activity has traditionally been evaluated by measuring the oxidation rates of artificial substrates, such as L-DOPA. However, it is recognized that the oxidation of L-DOPA is influenced not only by enzymatic reactions but also by abiotic oxidation mediated by soil minerals. In this perspective paper, our primary objective is to summarize the current understanding of the biotic and abiotic contributions to phenol oxidase activity. The biotic contribution to phenol oxidase activity appears to be relatively small when autoclaved soils are used as a negative control. However, autoclaving leads to an overestimation of negative control due to the exposure of minerals coated with organic matter. As an alternative approach, we attempted to estimate the minimum extent of biotic contribution to phenol oxidase activity through a 7.5-day short-term incubation. This approach involved measuring the decrease in phenol oxidase activity during incubation, as only biotic enzyme reactions undergo degradation during this period, while changes in the abiotic contribution are expected to be minimal. The results suggested that the biotic contribution accounted for at least 50 % to 83 % of the observed phenol oxidase activities, suggesting that the enzymatic contribution to L-DOPA oxidation is substantial, at least within our study sites. This approach also underestimates the biotic contribution to phenol oxidase activity, as it does not account for undegraded phenol oxidase or phenol oxidase production during incubation. In conclusion, while current approaches provide some insights, they are unable to fully distinguish between biotic and abiotic contributions to L-DOPA oxidation. A new technique is urgently required to effectively differentiate between biotic and abiotic contributions to L-DOPA oxidation.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"209 ","pages":"Article 106047"},"PeriodicalIF":4.8,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697390","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":"Investigation of bioremediation mechanism of nicosulfuron-contaminated soil by highly efficient degrading bacterial consortium YM1: Analysis of degradation genes and microbial community structure","authors":"Meiqi Dong ,&nbsp;Yufeng Xiao ,&nbsp;Siya Wang ,&nbsp;Bingbing Yang ,&nbsp;Hao Zhang ,&nbsp;Xian Wu","doi":"10.1016/j.apsoil.2025.106060","DOIUrl":"10.1016/j.apsoil.2025.106060","url":null,"abstract":"<div><div>Microbial degradation is a pivotal approach for mitigating pesticide residues. Nicosulfuron, a widely utilized sulfonylurea herbicide in modern agriculture, poses risks of soil contamination and adverse effects on human health when applied excessively. This study aimed to cultivate bacterial colonies proficient in nicosulfuron degradation to remediate contaminated soils. Through the one-way and response surface optimization techniques, it was determined that a combination of 31.85 g L⁻¹ glucose, 10.58 g L⁻¹ yeast extract, and 9.40 g L⁻¹ sodium chloride could achieve a 97.65 % degradation of nicosulfuron within 4 d. Optimal culture conditions included a temperature of 30 °C, pH of 7.0, nicosulfuron concentration of 50 mg L⁻¹, and 2 % inoculum. Analysis of antioxidant enzyme activity and nicosulfuron degradation gene expression in bacterial consortium YM1 cells revealed their ability to withstand nicosulfuron stress and facilitate degradation. The bacterial consortium YM1 achieved a degradation rate of 95.54 % in nicosulfuron-contaminated soil. Soil diversity analysis indicating that strains N80 and 2 N3 were the dominant bacterial genera in the community, with strains N1 and Mq4 also playing significant roles. These findings suggest mutual promotion of growth among the strains, resilience to external environmental stresses, and enhanced colonization in the soil. The bacterial consortium YM1 not only improved soil biodiversity but also enhanced soil enzyme activity and quality. This demonstrates the promising potential of these bacteria for biodegradation and soil remediation, offering an effective approach for remediating nicosulfuron-contaminated soils.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"209 ","pages":"Article 106060"},"PeriodicalIF":4.8,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706512","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":"Plant above-ground biomass drives the recovery of soil microbial communities in a subtropical-temperate transition zone following forest wildfire","authors":"Mengjun Hu ,&nbsp;Jiayin Feng ,&nbsp;Yu Shi ,&nbsp;Pengshuai Shao ,&nbsp;Zhijie Chen ,&nbsp;Zhenxing Zhou ,&nbsp;Jiali Wang","doi":"10.1016/j.apsoil.2025.106057","DOIUrl":"10.1016/j.apsoil.2025.106057","url":null,"abstract":"<div><div>Wildfire profoundly reshapes soil microbial community structure and function, thereby modulating biogeochemical processes in natural ecosystems. However, the extent to which post-fire vegetation restoration influences these microbial communities in forest soils remains insufficiently characterized. To address this knowledge gap, a chronosequence approach spanning post-fire intervals of 1, 6, 13, and 29 years was employed to assess shifts in microbial composition, biomass, and community structure in subtropical-temperate ecotonal forests of Central China. The findings indicate temporal fluctuations in microbial biomass, including microbial biomass carbon, nitrogen, and PLFA contents, with significant declines observed exclusively in the first year post-burn. These variations were primarily regulated by above-ground biomass and dissolved organic carbon. Microbial community structure exhibited dynamic responses to fire, with an increased gram-positive to gram-negative bacterial ratio and a rise in the cyclopropyl to precursor (cyc/pre) ratio during the early post-fire period. However, the fungi-to-bacteria ratio remained stable across the 29-year chronosequence. The elevated cyc/pre ratio was largely attributable to reductions in above-ground biomass, which altered resource availability and microbial interactions. Notably, fungal communities exhibited more prolonged shifts than bacterial communities, suggesting lower resilience to wildfire disturbances. These results highlight above-ground biomass as a critical determinant in the post-fire recovery trajectory of soil microbial communities.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"209 ","pages":"Article 106057"},"PeriodicalIF":4.8,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706511","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":"Mechanisms of microbial life strategy regulate the temperature sensitivity of soil respiration under winter warming conditions","authors":"Renjie Hou ,&nbsp;Haihong Zhao ,&nbsp;Qiang Fu ,&nbsp;Tianxiao Li ,&nbsp;Liuwei Wang ,&nbsp;Wei Huang ,&nbsp;Bingyu Zhu ,&nbsp;Yuxuan Wang ,&nbsp;Yunjia Hong","doi":"10.1016/j.apsoil.2025.106054","DOIUrl":"10.1016/j.apsoil.2025.106054","url":null,"abstract":"<div><div>This study investigated the mechanisms by which changing climatic and environmental scenarios (elevated freeze-thaw temperatures and increased pesticide contamination) affect the temperature sensitivity of soil respiration (Q₁₀) in seasonally frozen zones. We selected albic, chernozem and luvisol soils as typical soil types, and accelerate freeze-thaw cycle treatments were set at 0 (CK), 60 (A1), 120 (A2), 180 (A3), and 240 (A4) cycles, accompanied by a warming process of 15 °C. Meanwhile, soil pesticide enrichment concentrations were set at 0, 5, 10, 15, and 20 mg·kg⁻¹, respectively. The aim of the study was to explore the role of the transformation in microbial life strategists in driving the temperature sensitivity of soil respiration under freeze-thaw cycles and pesticide enrichment processes. The results indicated that the stability of soil aggregates was significantly reduced by freeze-thaw cycles. The release of labile carbon stored in aggregates into the soil resulted in a range of 31.35 % ∼ 48.65 % enhancement of soil carbon quality (aliphatic carbon/ aromatic carbon) in albic, chernozem, and luvisol soils relative to the CK group under the action of 120 freeze-thaw cycles. The <em>r</em>-selected taxa rapidly decompose labile carbon sources and use them for growth and reproduction, and the dominant taxa in the soil is transformed from <em>k</em>-strategists to <em>r</em>-strategists. Thus, the <em>k</em>- strategist characterization, such as bacterial oligotroph /copiotroph (B O/C), gram-positive/negative (G+/G-), and recalcitrant/labile organic carbon degradation enzyme activities (enzyme L/R), were significantly reduced by freeze-thaw cycles and pollution. Although the stronger metabolic activity and adaptive capacity of <em>r</em>-strategists increased the soil carbon mineralization rate, they weakened the sensitivity of metabolic activity to temperature changes. The Q₁₀ of the three soils decreased by 5.68 %, 10.66 %, and 30.42 %, respectively, compared with the CK. Therefore, the stimulatory effect of climate warming on soil respiration rates is not consistently enhanced, and carbon emission values may be lower than expected.</div></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":"209 ","pages":"Article 106054"},"PeriodicalIF":4.8,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696997","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}