Pedosphere最新文献

{"title":"Microbial genes for degrading plant-derived carbon are a key factor affecting soil respiration and temperature sensitivity in plateau peatlands","authors":"Wei JIANG ,&nbsp;Mingyao XIONG ,&nbsp;Shuzhen ZOU ,&nbsp;Di KANG","doi":"10.1016/j.pedsph.2024.07.003","DOIUrl":"10.1016/j.pedsph.2024.07.003","url":null,"abstract":"<div><div>Peatlands on the southwestern plateau of China are important carbon sinks for high-altitude terrestrial ecosystems in Asia. However, the specific microecological mechanism responsible for alterations in carbon processes in this region due to the simultaneous impacts of global warming and drought has not been fully elucidated. Investigating this mechanism will improve our understanding of carbon cycle feedback in peatland ecosystems, as it is affected by changes in hydrology and temperature, especially in vulnerable habitats. This study examined the influence of soil carbon decomposition functional microorganisms on soil respiration and temperature sensitivity (expressed as <em>Q</em>₁₀) in high-elevation peatlands using field investigations, simulated warming experiments, and metagenomic sequencing. We found that hydrothermal conditions had a significant effect on soil respiration, leading to an increase in cumulative soil respiration as soil moisture and temperature increased. Soil moisture affected soil respiration and soil organic carbon mainly through soil microorganisms, with a predominance of carbon-decomposing genes. We found that genes regulating the decomposition of plant-derived carbon such as cellulose and lignin were the critical factor influencing <em>Q</em>₁₀ in peatlands. Genes involved in cellulose and lignin decomposition showed a significant positive correlation with <em>Q</em>₁₀ (<em>P</em> &lt; 0.05), while genes involved in hemicellulose decomposition showed a significant negative correlation with <em>Q</em>₁₀ (<em>P</em> &lt; 0.05). Specifically, genes such as <em>ACO</em>, <em>xylF</em>, and <em>hpaE</em>, which are involved in lignin decomposition, and <em>glgB</em>, which is responsible for cellulose decomposition, showed significant positive correlations (<em>P</em> &lt; 0.05) with <em>Q</em>₁₀. Conversely, the gene <em>uxaC</em>, involved in the decomposition of hemicellulose, showed a significant negative correlation (<em>P</em> &lt; 0.05) with <em>Q</em>₁₀. Finally, we analyzed the relevant carbon metabolic pathways and found that although they were affected by water, they were not significantly related to <em>Q</em>₁₀. In short, this research highlights the importance of microorganisms with genes for decomposing plant-derived carbon in influencing carbon emissions in plateau peatlands during periods of warming.</div></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 6","pages":"Pages 1026-1037"},"PeriodicalIF":5.2,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141708180","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":"Role of nosZ I-carrying microorganisms in regulating nitrous oxide reduction during forest conversion: A comparison of plantations and a secondary forest in subtropical soils","authors":"Milin DENG ,&nbsp;Guiping YE ,&nbsp;Hang-Wei HU ,&nbsp;Chao XU ,&nbsp;Ping YANG ,&nbsp;Yong ZHENG ,&nbsp;Jupei SHEN ,&nbsp;Shengsheng JIN ,&nbsp;Ji-Zheng HE ,&nbsp;Yongxin LIN","doi":"10.1016/j.pedsph.2023.09.006","DOIUrl":"10.1016/j.pedsph.2023.09.006","url":null,"abstract":"<div><div>The conversion of natural forests in subtropical regions to plantations or secondary forests has resulted in alterations in soil variables, microbial communities, and microbially mediated processes, including nitrous oxide (N₂O) emissions. However, how forest conversion influences soil N₂O reduction and the abundance and community structure of N₂O-reducing microorganisms remains unclear. Here, we investigated the impact of converting natural forests to a secondary forest and <em>Cunninghamia lanceolata</em> and <em>Pinus massoniana</em> plantations on the abundance and community structure of N₂O-reducing microorganisms in both bulk soils and soil aggregates. Compared with the secondary forest, plantations had higher soil pH and available phosphorus and moisture contents, lower soil NH₄⁺ content, but similar aggregate sizes. Compared with the secondary forest, the conversion of natural forest to plantations resulted in significantly higher soil N₂O reduction rate and increased abundances of <em>nosZ</em> I and <em>nosZ</em> II genes in bulk soils and soil aggregates. The abundance of <em>nosZ</em> I was higher than that of <em>nosZ</em> II in all tested soils and had a stronger association with N₂O reduction rate, suggesting the greater role of <em>nosZ</em> I-carrying microorganisms in N₂O consumption. Forest conversion had a greater impact on the community composition of <em>nosZ</em> I than <em>nosZ</em> II, mainly by increasing the relative abundances of alpha- and beta-Proteobacteria, while decreasing gamma-Proteobacteria. However, <em>nosZ</em> II-carrying microorganisms were exclusively dominated by Gemmatimonadetes and less affected by forest conversion. Taken together, our findings significantly contribute to our understanding of the eco-physiological characteristics of N₂O-reducing microorganisms and highlight the importance of <em>nosZ</em> I-carrying microorganisms in N₂O consumption in subtropical forest soils.</div></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 6","pages":"Pages 1066-1075"},"PeriodicalIF":5.2,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134994401","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":"Changes of nutrients and microbial communities in recovery process of abandoned rare earth tailings","authors":"","doi":"10.1016/j.pedsph.2023.06.007","DOIUrl":"10.1016/j.pedsph.2023.06.007","url":null,"abstract":"<div><p>Rare earth element (REE) mining has wrought severe ecosystem destruction, particularly in the loss of carbon (C), nitrogen (N), and phosphorus (P). Furthermore, its effects on nutrient recovery characteristics and associated microbial abundance are still poorly understood. In this study, an investigation was conducted to determine C, N, and P recovery patterns and microbial communities in abandoned REE mining tailings with different abandoned durations of 1.5 (1.5-Y), 7 (7-Y), 10 (10-Y), and 14 (14-Y) years and at an unmined site (the control group) in Jiangxi Province, China. Longitudinal tailing delamination at each site was investigated in 0–15 (layer 1) and 15–30 (layer 2) cm tailing layers. During the abandoned duration of REE tailings, C and P in layer 1 continued to recover from 1.62 to 8.51 g kg^-1 and from 0.71 to 1.94 g kg^-1, respectively; N losses of 0.60 and 0.22 g kg^-1 occurred at the 1.5-Y and 10-Y sites, while N in layer 1 slightly increased at the 14-Y site. <em>Mesorhizobium</em>, <em>Methylosinus</em>, <em>Bradyrhizobium</em>, <em>Pseudomonas</em>, and <em>Azospirillum</em> were dominant bacteria at the 14-Y site and in the control. The relative abundances of N-fixing bacteria <em>Mesorhizobium</em> (32.94%), <em>Sinorhizobium</em> (0.24%), <em>Frankia</em> (0.71%), and <em>Burkholderia</em> (2.38%) at the 14-Y site were 1.33–3.97 times those in the control (24.19%, 0.18%, 0.32% and 0.60%, respectively), which was helpful for tailing N recovery. At the 14-Y site, <em>Tylospora</em> (50.24%), <em>Luellia</em> (11.02%), <em>Tomentella</em> (6.94%), and <em>Chaetomium</em> (4.34%) were the dominant fungal genera, while <em>Tylospora</em> (56.93%), <em>Suillus</em> (11.45%), and <em>Penicillium</em> (6.78%) predominated in the control. The relative abundance of the P-dissolving fungus <em>Aspergillus</em> at the 14-Y site (0.42%) was 4.2 times that in the control (0.1%), which may lead to the improved tailing P solubility. At the 14-Y site, woody plants such as <em>Pinus massoniana</em> and native pioneering herbs and ferns such as <em>Dicranopteris dichotoma</em> and <em>Nephrolepis auriculata</em> probably invaded from adjacent areas. This study unraveled the natural restoration of plant and microbial communities along with soil nutrient changes in abandoned REE tailings, thus providing a novel insight into ecological recovery and restoration after mining.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 4","pages":"Pages 826-836"},"PeriodicalIF":5.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43443805","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":"Straw return decreases polycyclic aromatic hydrocarbon (PAH) accumulation in winter wheat and human health risk by enhancing PAH dissipation in rhizosphere soil","authors":"","doi":"10.1016/j.pedsph.2023.05.007","DOIUrl":"10.1016/j.pedsph.2023.05.007","url":null,"abstract":"<div><p>Straw return <em>in situ</em>, a common agronomic measure in China, has been widely used not only to increase crop yields and improve soil nutrients but also to remove polycyclic aromatic hydrocarbons (PAHs) from agricultural soils. Nevertheless, the safety risks of food crops (<em>i.e</em>., human health risk of wheat grains) grown in PAHs-contaminated agricultural soils amended with crop straw remain uncertain. A pot experiment was conducted in a PAHs-contaminated agricultural soil cultivated with winter wheat under different ratios of corn straw addition (0% (control, CK), 1%, 2.5%, and 5%, weight/weight). Results showed that corn straw addition significantly (<em>P</em> &lt; 0.05) decreased PAH concentrations in rhizosphere soil, roots, straws, and grains by 48.32%–50.01%, 11.85%–42.67%, 9.78%–28.03%, and 14.16%–31.67%, respectively, compared with CK, whereas the transfer factors of PAHs from roots to straws were significantly (<em>P</em> &lt; 0.05) increased. A correlation heatmap showed that PAH concentrations in roots, straws, and grains were positively (<em>P</em> &lt; 0.01) correlated with those in rhizosphere soil. These indicated that corn straw decreased PAH accumulation in winter wheat due to the increase of PAH dissipation in the rhizosphere soil, although it enhanced PAH transfer in winter wheat. The incremental lifetime cancer risk (ILCR) model indicated that corn straw significantly (<em>P</em> &lt; 0.05) decreased the human health risk of winter wheat grains by 29.73%–45.05%. Overall, corn straw apparently reduced PAH accumulation in winter wheat, ecological risk, and human health risk <em>via</em> enhancing PAH dissipation in the rhizosphere soil. These findings provide an important scientific basis and theoretical guidance for agricultural safety production.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 4","pages":"Pages 699-708"},"PeriodicalIF":5.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43568681","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":"Wheat morphological and biochemical responses to copper oxide nanoparticles in two soils","authors":"","doi":"10.1016/j.pedsph.2023.05.010","DOIUrl":"10.1016/j.pedsph.2023.05.010","url":null,"abstract":"<div><p>The widespread application of copper oxide nanoparticles (CuO NPs) in agricultural production has caused growing concerns about their impact on crops. In this study, wheat root elongation was used to evaluate the toxic effect concentrations of CuO NPs in two soils with differing properties, collected from farmlands in Guangdong (GD) and Shandong (SD) provinces, China. Plant morphological and biochemical properties were also assessed to explore the toxicity mechanism of CuO NPs on wheat seedlings. The root elongation results revealed lower toxic effect concentration values in the plants grown in GD soil than in SD soil. Furthermore, the treatment with CuO NPs at 200 mg Cu kg^-1 significantly reduced wheat root and shoot biomass by 35.8% and 15.8%, respectively, in GD soil. Electron microscopy showed that CuO NPs deformed wheat roots and entered leaf cells, causing deformation and damaging the cell structure. The CuO NP treatments also decreased chlorophyll content, increased antioxidant enzyme activity, and increased membrane lipid peroxidation in wheat leaves. The addition of CuO NPs significantly reduced the Zn (by 17.3%) and Fe (by 26.9%) contents in the leaves of plants grown in GD and SD soils, respectively. However, the contents of Cu, Mg, and Mn were increased by 27.4%–52.5% in GD soil and by 17.9%–71.6% in SD soil. These results suggested that CuO NPs showed greater toxicity to wheat plants grown in acidic soil than in alkaline soil and that the adverse effects of CuO NP treatments on wheat seedlings were due to a combination of CuO NPs and released Cu²⁺.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 4","pages":"Pages 814-825"},"PeriodicalIF":5.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41257718","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":"15N tracers and microbial analyses reveal in situ N2O sources in contrasting water regimes of a drained peatland forest","authors":"","doi":"10.1016/j.pedsph.2023.06.006","DOIUrl":"10.1016/j.pedsph.2023.06.006","url":null,"abstract":"<div><p>Managed peatlands are a significant source of nitrous oxide (N₂O), a powerful greenhouse gas and stratospheric ozone depleter. Due to the complexity and diversity of microbial N₂O processes, different methods such as tracer, isotopomer, and microbiological technologies are required to understand these processes. The combined application of different methods helps to precisely estimate these processes, which is crucial for the future management of drained peatlands, and to mitigate soil degradation and negative atmospheric impact. In this study, we investigated N₂O sources by combining tracer, isotopomer, and microbial analysis in a drained peatland forest under flooded and drained treatments. On average, the nitrification genes showed higher abundances in the drained treatment, and the denitrification genes showed higher abundances in the flooded treatment. This is consistent with the underlying chemistry, as nitrification requires oxygen while denitrification is anaerobic. We observed significant differences in labelled N₂O fluxes between the drained and flooded treatments. The emissions of N₂O from the flooded treatment were nearly negligible, whereas the N₂O evolved from the nitrogen-15 (¹⁵N)-labelled ammonium (¹⁵NH₄⁺) in the drained treatment peaked at 147 μg ¹⁵N m^-2 h^-1. This initially suggested nitrification as the driving mechanism behind N₂O fluxes in drained peatlands, but based on the genetic data, isotopic analysis, and N₂O mass enrichment, we conclude that hybrid N₂O formation involving ammonia oxidation was the main source of N₂O emissions in the drained treatment. Based on the ¹⁵N-labelled nitrate (¹⁵NO₃^-) tracer addition and gene copy numbers, the low N₂O emissions in the flooded treatment came possibly from complete denitrification producing inert dinitrogen. At atomic level, we observed selective enrichment of mass 45 of N₂O molecule under ¹⁵NH₄⁺ amendment in the drained treatment and enrichment of both masses 45 and 46 under ¹⁵NO₃^- amendment in the flooded treatment. The selective enrichment of mass 45 in the drained treatment indicated the presence of hybrid N₂O formation, which was also supported by the high abundances of archaeal genes.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 4","pages":"Pages 749-758"},"PeriodicalIF":5.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47568870","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":"Co-occurrence of per- and polyfluoroalkyl substances, heavy metals and polycyclic aromatic hydrocarbons and their composite impacts on microbial consortium in soil: A field study","authors":"","doi":"10.1016/j.pedsph.2023.06.001","DOIUrl":"10.1016/j.pedsph.2023.06.001","url":null,"abstract":"<div><p>This is the first study to report the co-occurrence of per- and polyfluoroalkyl substances (PFASs), heavy metals, and polycyclic aromatic hydrocarbons (PAHs) and their impacts on the native microbial consortium in soil due to the long-term exposure. The PFASs, heavy metals, and PAHs were detected in soil samples collected at 2–6 m below the ground surface at different sampling locations in a steel-making factory. The total concentrations of PFASs varied from 6.55 to 19.79 ng g^-1, with perfluorooctane sulfonate (PFOS), perfluorobutane sulfonate, and 6:2 chlorinated polyfluorinated ether sulfonate (alternative of PFOS) being the predominant PFASs. The concentrations of arsenic, cadmium, and lead were detected in the ranges of 4.40–1 270.00, 0.01–8.67, and 18.00–647.00 mg kg^-1, respectively, and the concentration of total PAHs was detected in the range of 1.02–131.60 mg kg^-1. The long-term exposure to mixed contaminants of PFASs, heavy metals, and PAHs led to lower richness and diversity of microbial communities in soil. The soil bacterial communities were mainly composed of <em>Pseudomonas</em>, norank_p_GAL15, <em>Leptothrix</em>, norank_o_Rokubacteriales, and <em>Acinetobacter</em>. Correlations between soil environmental factors and microbial communities indicated that cation exchange capacity and total phosphorus were two key factors in shaping the composition of native microbial communities. Furthermore, <em>Arthrobacter</em>, <em>Leptothrix</em>, and <em>Sphingobium</em> were found to be significantly positively correlated with PFAS concentrations, indicating that these genera could tolerate the stress exerted by PFASs, along with the stress imposed due to the presence of heavy metals or/and PAHs.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 4","pages":"Pages 736-748"},"PeriodicalIF":5.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47541773","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":"Evaluating the necessity of autumn irrigation on salinized soil by considering changes in soil physicochemical properties","authors":"","doi":"10.1016/j.pedsph.2023.05.003","DOIUrl":"10.1016/j.pedsph.2023.05.003","url":null,"abstract":"","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 4","pages":"Pages 837-842"},"PeriodicalIF":5.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41291125","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":"Cadmium found in peanut (Arachis hypogaea L.) kernels mainly originates from root uptake rather than shell absorption from soil","authors":"","doi":"10.1016/j.pedsph.2023.05.009","DOIUrl":"10.1016/j.pedsph.2023.05.009","url":null,"abstract":"<div><p>Roots and shells are two potential organs through which peanut plants absorb cadium (Cd) from soils; however, the relative contributions of the two uptake pathways (root uptake and shell absorption) to kernel Cd accumulation and their translocation characteristics are poorly understood. In this study, the relative contributions of the two pathways to Cd accumulation in two peanut cultivars, Xianghua2008 (XH) and Yueyou43 (YY), were accurately assessed by labeling rooting and podding zone soils with ¹¹³Cd and ¹¹¹Cd isotopes (0.3 mg kg^-1 dry soil), respectively, in a split-pot design. The results showed that approximately 96% of the Cd accumulated in the peanut kernels was derived from root uptake, while only 4% originated from shell absorption. Only 1% of the Cd accumulated in whole peanut plants was attributed to shell absorption, of which 41%–44% was retained in shells and 56%–59% was translocated to kernels. In contrast, the Cd absorbed by roots was efficiently translocated into all plant organs, of which 80%–84% was distributed in shoots. Although YY accumulated 1.3 times more Cd in whole plants than XH, the relative contributions of the two pathways to Cd accumulation in each plant organ were barely affected by peanut cultivars. Due to the strong retention effect of shells, shell-derived Cd was approximately 2 times higher than root-derived Cd in shells. These results would improve the understanding of Cd accumulation processes in peanut plants, revealing that the root uptake pathway contributes predominantly to the Cd concentration in peanut kernels, based on which strategies and technology for the reduction of Cd in peanut plants could be designed and developed.</p></div>","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 4","pages":"Pages 726-735"},"PeriodicalIF":5.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42301779","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":"Assessment of SoilGrids data for soil erosion estimation at watershed scale: A case study in northern Thailand","authors":"","doi":"10.1016/j.pedsph.2023.03.022","DOIUrl":"10.1016/j.pedsph.2023.03.022","url":null,"abstract":"&lt;div&gt;&lt;p&gt;Soil erosion has been identified as one of the most destructive forms of land degradation, posing a threat to the sustainability of global economic, social and environmental systems. This underscores the need for sustainable land management that takes erosion control and prevention into consideration. This requires the use of state-of-the-art erosion prediction models. The models often require extensive input of detailed spatial and temporal data, some of which are not readily available in many developing countries, particularly detailed soil data. The soil dataset Global Gridded Soil Information (SoilGrids) could potentially fill the data gap. Nevertheless, its value and accuracy for soil erosion modelling in the humid tropics is still unknown, necessitating the need to assess its value vis-à-vis field-based data. The major objective of this study was to conduct a comparative assessment of the value of SoilGrids and field-based soil data for estimating soil loss. Soil samples were collected from five physiographic positions (summit, shoulder, back slope, foot slope, and toe slope) using the soil catena approach. Samples were collected using a 5-cm steel sample ring (undisturbed) and a spade (disturbed). Data of the landform, predominant vegetation types, canopy cover, average plant height, land use, soil depth, shear strength, and soil color were recorded for each site. The soil samples were subjected to laboratory analysis for saturated hydraulic conductivity, bulk density, particle size distribution, and organic matter content. Pedotransfer functions were applied on the SoilGrids and field-based data to generate soil hydrological properties. The resultant field-based data were compared with the SoilGrids data for corresponding points/areas to determine the potential similarities of the two datasets. Both datasets were then used as inputs for soil erosion assessment using the revised Morgan-Morgan-Finney model. The results from both datasets were again compared to determine the degree of similarity. The results showed that with respect to point-based comparison, both datasets were significantly different. At the hillslope delineation level, the field-based data still consistently had a greater degree of variability, but the hillslope averages were not significantly different for both datasets. Similar results were recorded with the soil loss parameters generated from both datasets; point-based comparison showed that both datasets were significantly different, whereas the reverse was true for parcel/area-based comparison. SoilGrids data are certainly useful, especially where soil data are lacking; the utility of this dataset is, however, dependent on the scale of operation or the extent of detail required. When detailed, site-specific data are required, SoilGrids may not be a good alternative to soil survey data in the humid tropics. On the other hand, if the average soil properties of a region, area, or land parcel are required for the ","PeriodicalId":49709,"journal":{"name":"Pedosphere","volume":"34 4","pages":"Pages 797-813"},"PeriodicalIF":5.2,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48731965","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}