Pedosphere最新文献

{"title":"Spatiotemporal evolution and assembly processes of ammonia-oxidizing prokaryotic communities in 1 000-year-old coastal reclaimed soils","authors":"Sarfraz HUSSAIN ,&nbsp;Yifan YIN ,&nbsp;Senlin LIU ,&nbsp;Shanshan YAN ,&nbsp;Dongjie CHEN ,&nbsp;Hui CAO ,&nbsp;Feng WANG","doi":"10.1016/j.pedsph.2023.01.006","DOIUrl":"10.1016/j.pedsph.2023.01.006","url":null,"abstract":"<div><p>Coastal marshes are transitional areas between terrestrial and aquatic ecosystems. They are sensitive to climate change and anthropogenic activities. In recent decades, the reclamation of coastal marshes has greatly increased, and its effects on microbial communities in coastal marshes have been studied with great interest. Most of these studies have explained the short-term spatiotemporal variation in soil microbial community dynamics. However, the impact of reclamation on the community composition and assembly processes of functional microbes (<em>e.g</em>., ammonia-oxidizing prokaryotes) is often ignored. In this study, using quantitative polymerase chain reaction and the Ion S5™ XL sequencing platform, we investigated the spatiotemporal dynamics, assembly processes, and diversity patterns of ammonia-oxidizing prokaryotes in 1 000-year-old reclaimed coastal salt marshes. The taxonomic and phylogenetic diversity and composition of ammonia oxidizers showed apparent spatiotemporal variations with soil reclamation. Phylogenetic null modelling-based analysis showed that across all sites, the archaeal ammonia-oxidizing community was assembled by a deterministic process (84.71%), and deterministic processes were also dominant (55.2%) for ammonia-oxidizing bacterial communities except for communities at 60 years of reclamation. The assembly process and nitrification activity in reclaimed soils were positively correlated. The abundance of the <em>amoA</em> gene and changes in ammonia-oxidizing archaeal and bacterial diversities significantly affected the nitrification activity in reclaimed soils. These findings suggest that long-term coastal salt marsh reclamation affects nitrification by modulating the activities of ammonia-oxidizing microorganisms and regulating their community structures and assembly processes. These results provide a better understanding of the effects of long-term land reclamation on soil nitrogen-cycling microbial communities.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 4","pages":"Pages 709-725"},"PeriodicalIF":5.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141963234","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":"Change of pore water near the freezing front during soil freezing: Migration and mechanisms","authors":"","doi":"10.1016/j.pedsph.2023.06.009","DOIUrl":"10.1016/j.pedsph.2023.06.009","url":null,"abstract":"<div><p>The formation and growth of segregation ice dominate the frost heave during soil freezing, which is closely related to water migration. To analyze segregation ice during soil freezing for different soils, a freezing-thawing experiment was conducted with Lanzhou loess (LZL) and Qinghai-Tibet Plateau silty clay (QSC) using a novel layered nuclear magnetic resonance approach. During LZL freezing, the unfrozen water content first increased and then decreased with decreasing temperature near the freezing front, but decreased with decreasing temperature in other layers, whereas during the freezing of QSC, the unfrozen water content in different layers (including the freezing front) decreased with decreased temperature. Notably, the increased liquid water near the freezing front during LZL freezing was primarily adsorbed water. In addition to the temperature gradient, the squeezing action during soil freezing was another important factor affecting water migration, especially at the early stage of soil freezing. However, which of the two factors, squeezing action and temperature gradient, was the dominant one causing water migration depended on soil structure. At the early stage of soil freezing, the squeezing action had a significant effect on the water migration of LZL, but no significant effect on that of QSC. Furthermore, water accumulation of LZL near the freezing front due to squeezing action at the early stage of freezing limited the formation and growth of segregation ice. This study provided an improved understanding for ice segregation and water migration during soil freezing.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 4","pages":"Pages 770-782"},"PeriodicalIF":5.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47394496","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":"Global and regional soil organic carbon estimates: Magnitudes and uncertainties","authors":"","doi":"10.1016/j.pedsph.2023.06.005","DOIUrl":"10.1016/j.pedsph.2023.06.005","url":null,"abstract":"<div><p>Globally, soil is the largest terrestrial carbon (C) reservoir. Robust quantification of soil organic C (SOC) stocks in existing global observation-based estimates avails accurate predictions in carbon-climate feedbacks and future climate trends. We investigated the magnitudes and distributions of global and regional SOC estimates (<em>i.e</em>., density and stocks) based on five widely used global gridded SOC datasets, a regional permafrost dataset developed in 2021 (UM2021), and a global-scale soil profile database (World Soil Information Service) reporting measurements of a series of physical and chemical edaphic attributes. The five global gridded SOC datasets were the Harmonized World Soil Database (HWSD), World Inventory of Soil Emission Potentials at 30 arc-second resolution (WISE30sec), Global Soil Dataset for Earth System Models (GSDE), Global Gridded Soil Information at 250-m resolution (SoilGrids250m), and Global Soil Organic Carbon Map (GSOCmap). Our analyses showed that the magnitude and distribution of SOC varied widely among datasets, with certain datasets showing region-specific robustness. At the global scale, SOC stocks at the top 30 and 100 cm were estimated to be 828 (range: 577–1 171) and 1 873 (range: 1 086–2 678) Pg C, respectively. The estimates from GSDE, GSOCmap, and WISE30sec were comparable, and those of SoilGrids250m and HWSD were at the upper and lower ends. The spatial SOC distribution varied greatly among datasets, especially in the northern circumpolar and Tibetan Plateau permafrost regions. Regionally, UM2021 and WISE30sec performed well in the northern circumpolar permafrost regions, and GSDE performed well in China. The estimates of SOC by different datasets also showed large variabilities across different soil layers and biomes. The discrepancies were generally smaller for the 0–30 cm soil than the 0–100 cm soil. The datasets demonstrated relatively higher agreement in grasslands, croplands, and shrublands/savannas than in other biomes (<em>e.g</em>., wetlands). The users should be mindful of the gaps between regions and biomes while choosing the most appropriate SOC dataset for specific uses. Large uncertainties in existing global gridded SOC estimates were generally derived from soil sampling density, different sources, and various mapping methods for soil datasets. We call for future efforts for standardizing soil sampling efforts, cross-dataset comparison, proper validation, and overall global collaboration to improve SOC estimates.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 4","pages":"Pages 685-698"},"PeriodicalIF":5.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42028794","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":"Combining conservation tillage with nitrogen fertilization promotes maize straw decomposition by regulating soil microbial community and enzyme activities","authors":"","doi":"10.1016/j.pedsph.2023.05.005","DOIUrl":"10.1016/j.pedsph.2023.05.005","url":null,"abstract":"<div><p>Straw return can effectively improve farmland soil microenvironment and fertility. However, excessive straw in the topsoil adversely affects seed germination and crop growth. At present, the characteristics and key driving factors of straw decomposition in dry farmlands are unclear. Based on the interactions between tillage practices including zero tillage (ZT), chisel tillage (CT), and plow tillage (PT) and nitrogen (N) fertilization, <em>i.e</em>., low N (N1, 180 kg ha^-1), normal N (N2, 240 kg ha^-1), and high N (N3, 300 kg ha^-1), quantitative polymerase chain reaction technology and an enzymatic detection kit were used to investigate the effects of key straw C-degrading enzyme activities and microbial abundance in soil on maize straw decomposition during the growth period of winter wheat in the winter wheat/summer maize double cropping system in a dry farmland of the Loess Plateau, China. Between 2018 and 2020, ZT and CT significantly increased winter wheat yield (by 10.94% and 12.79%, respectively) and straw decomposition velocity (by 20% and 26.67%, respectively), compared with PT. Compared to N1 and N3, N2 significantly increased wheat yield (by 4.65% and 5.31%, respectively) and straw decomposition velocity (by 26.33% and 13.21%, respectively). The partial least squares pathway modelling showed significant positive direct effects of soil moisture, NO₃^-, NH₄⁺, total N, bacteria, and cellulase, laccase, and xylanase activities on straw decomposition, while soil pH, fungi, and Actinomycetes had significant negative direct effects. Overall, conservation tillage (ZT and CT) combined with N2 was beneficial for straw decomposition in the drylands of the Loess Plateau and improved straw resource utilization and basic soil fertility. The results of the study clarified the key drivers of straw decomposition in dry farmlands and provided new ideas for developing updated soil management practices and adaptive N application strategies to promote the resource utilization of straw and achieve the goals of carbon peaking and carbon neutrality.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 4","pages":"Pages 783-796"},"PeriodicalIF":5.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41948405","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":"In-situ warming does not change soil priming effect induced by glucose addition in a temperate forest","authors":"","doi":"10.1016/j.pedsph.2023.06.003","DOIUrl":"10.1016/j.pedsph.2023.06.003","url":null,"abstract":"<div><p>Priming effect (PE) on soil organic carbon (SOC) decomposition caused by the addition of organic carbon (C) is an important ecological process in regulating soil C cycle. Additionally, most priming studies are confined to laboratory trials, while the assessment of soil PE under field conditions with variable weather conditions is scarce. This study assessed the direct effects of glucose addition and <em>in-situ</em> warming on the extent of PE under field conditions in a temperate forest. We evaluated soil PE using ¹³C-glucose labelling, a simple and novel technique, based on the Keeling plot method. Glucose addition significantly enhanced native SOC decomposition and induced strong PE. However, the effect of <em>in-situ</em> warming on the extent of PE was not significant. This study confirms the importance of PE in regulating SOC turnover under field conditions.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 4","pages":"Pages 759-769"},"PeriodicalIF":5.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45035319","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":"Insight into slag-enhanced thermal desorption at the organo-mineral interface of clay soils","authors":"Juan ZHANG ,&nbsp;Xin WANG ,&nbsp;Xinyue DU ,&nbsp;Shukai FAN ,&nbsp;Hui LIU ,&nbsp;Minghua ZHANG","doi":"10.1016/j.pedsph.2024.06.005","DOIUrl":"10.1016/j.pedsph.2024.06.005","url":null,"abstract":"<div><div>Multiple active components in steel slags can optimize soil texture and catalyze the thermal desorption of refractory organic pollutants, especially polycyclic aromatic hydrocarbons (PAHs). In this study, a safety and risk assessment was conducted on toxic metals present in collected steel slags, and the refining slag with a high content of free-CaO from the XG iron and steel plant (XGRS) was selected and used to regulate the plasticity index (PI) of clay soils. For the clay soil with high liquid limit and high plasticity (CH), the PI reduced from 34.3% to 24.8% with steel slags at an addition ratio of 10% (mass percent), and for the clay soil with low liquid limit (CL), the PI decreased from 22.8% to 16.5%, resulting in silt soil with optimal thermal properties. The thermal removal efficiency of PAHs in CH decreased from 81.9% to 74.0% at 350°C as the soil water content increased from 0 to 150 g kg⁻¹, due to the hydration and swelling of clay minerals and the heat loss associated with dehydroxylation and dehydration. The efficiency further decreased to 68.7% using 2% (mass percent) CaO as an additive due to the delayed dehydr(oxyl)ation of clay minerals and enhanced aromatization of soil organic matter. In contrast, addition of 2% high-content titania-bearing slag (HTBS) enhanced the removal efficiency of high-ring PAHs, with the efficiency increasing for 5-ring from 52.6% to 59.7% and for 6-ring from 76.6% to 81.8%. This is due to the presence of amorphous TiO₂ and crystalline CaTiO₃ in HTBS, which can degrade water to produce reactive oxygen species. The 2% XGRS addition facilitated the complete removal of PAHs by air-supplemented lattice oxygen, leading to the oxidation of C–C bonds in CH to C–O, C=O, and O–C=O functional groups. This study provides valuable insights into the use of additives to enhance the thermal remediation of PAH-contaminated clay soils <em>via</em> activating oxygen species and oxidizing C–C bonds in organo-mineral complexes within clay soils.</div></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"35 2","pages":"Pages 312-324"},"PeriodicalIF":5.2,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141395878","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":"Rhizosphere microbes influence wogonoside accumulation in perennial Scutellaria baicalensis","authors":"Yang SUN ,&nbsp;Hong LIU ,&nbsp;Junwei PENG ,&nbsp;Minchong SHEN ,&nbsp;Yang HU ,&nbsp;Dongsheng YU ,&nbsp;Jiangang LI ,&nbsp;Yuanhua DONG","doi":"10.1016/j.pedsph.2023.04.008","DOIUrl":"10.1016/j.pedsph.2023.04.008","url":null,"abstract":"<div><p>Dried roots of <em>Scutellaria baicalensis</em> Georgi are an acclaimed traditional Chinese medicine, and wogonoside content is a key indicator used to evaluate <em>S. baicalensis</em> quality. Rather than rising linearly with cultivation years, <em>S. baicalensis</em> quality initially increases and then declines. However, little is known regarding the dynamic variations in <em>S. baicalensis</em> rhizosphere microorganisms under long-term cultivation and underlying mechanisms of their effects on wogonoside formation and accumulation. The aim of this study was to investigate the roles of soil nutrients and rhizosphere microbes on <em>S. baicalensis</em> quality across different cultivation years (1–4 years). The wogonoside content (25.14 mg g^-1) was highest in the biennial <em>S. baicalensis</em> and then decreased following long-term cultivation. Most soil nutrients (available nitrogen, available phosphorus, available iron, available manganese, and available zinc) were reduced significantly as cultivation years increased. Time also affected rhizosphere bacterial community structure significantly, driving it toward deterministic process (<em>i.e</em>., β-nearest taxon index &lt; -2). Available manganese and exchangeable calcium indirectly affected wogonoside formation and accumulation. Wogonoside inhibition was driven by the reduction in rhizosphere bacterial diversity, which significantly increased the relative abundance of beta-glucosidase and decreased the relative abundance of phenylalanine ammonialyase. The rhizosphere microenvironment was altered under long-term cultivation, thereby shaping rhizosphere bacterial community, reducing the community diversity, and ultimately inhibiting wogonoside formation and accumulation. Our findings may aid in understanding of the mechanisms and reasons for the reduction in <em>S. baicalensis</em> quality under long-term cultivation from the perspective of soil nutrients and microorganisms, which may theoretically support the future artificial cultivation and management of Chinese medicinal plants.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 3","pages":"Pages 553-566"},"PeriodicalIF":5.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48002267","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":"A perspective on greenhouse gas emission studies integrating arbuscular mycorrhiza","authors":"Stavros D. VERESOGLOU,&nbsp;Junjiang CHEN","doi":"10.1016/j.pedsph.2023.01.001","DOIUrl":"10.1016/j.pedsph.2023.01.001","url":null,"abstract":"<div><p>Climate change is a global emergency. It is only possible to pace down global change through addressing the triggers of it, greenhouse gas emissions. Despite commendable progress, we think that there is plenty of room to further make the studies addressing global change realistic, through integrating into them biotic interactions. We make a case for this statement through a bibliometrics analysis on agricultural studies exploring greenhouse gas emissions that consider arbuscular mycorrhiza. We show that even though mycorrhizal studies account right now for a small fraction of the agricultural literature, they get cited more often. We further demonstrate that mycorrhizal studies are typically more descriptive in their nature, which we support through comparing the keywords they list. We subsequently use the opportunity to identify shortcomings and opportunities to further integrate mycorrhiza into agricultural studies assaying greenhouse gas emissions. We finally make a call to better integrate arbuscular mycorrhiza into global change studies.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 3","pages":"Pages 525-529"},"PeriodicalIF":5.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49179379","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":"Phytoremediation capacity of the hyperaccumulator Solanum nigrum L. and Solanum lycopersicum L. cultivars at the flowering stage in cadmium-polluted soil","authors":"Jibao JIA ,&nbsp;Huiping DAI ,&nbsp;Shuhe WEI ,&nbsp;Lidia SKUZA ,&nbsp;Jianming XUE ,&nbsp;Rong LI ,&nbsp;Quan SUN","doi":"10.1016/j.pedsph.2023.03.001","DOIUrl":"10.1016/j.pedsph.2023.03.001","url":null,"abstract":"","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 3","pages":"Pages 676-680"},"PeriodicalIF":5.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43021498","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":"Corrigendum to “Incorporation of source contributions to improve the accuracy of soil heavy metal mapping using small sample sizes at a county scale” (Pedosphere. 34(1): 170–180, 2024)","authors":"Jie SONG ,&nbsp;Xin WANG ,&nbsp;Dongsheng YU ,&nbsp;Jiangang LI ,&nbsp;Yanhe ZHAO ,&nbsp;Siwei WANG ,&nbsp;Lixia MA","doi":"10.1016/S1002-0160(24)00055-9","DOIUrl":"https://doi.org/10.1016/S1002-0160(24)00055-9","url":null,"abstract":"","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 3","pages":"Page 651"},"PeriodicalIF":5.7,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1002016024000559/pdfft?md5=f4578c299baba269348411e00c960687&pid=1-s2.0-S1002016024000559-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141325287","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}