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Single-time fertilization with controlled release blended fertilizer optimizes soil nitrogen distribution and root characteristics to increase conventional japonica rice(Oryza sativa L.)grain yield and nitrogen use efficiency 认领 引用 被引量：2
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作者 Yuhui Wang Jie Sun +13 位作者 Shen Gao Bin He Zhengyang Wu Wenjun He Weike Tao Xin’ao Tang Zhi Geng Weiwei Li Fei Yang Zhengrong Jiang Zhenghui Liu Yanfeng Ding Soulaiman Sakr Ganghua Li 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2026年第7期2771-2782,共12页
Single-time fertilization(STF)with controlled release blended fertilizer(CRBF)improves grain yield and nitrogen use efficiency(NUE)in rice production.However,the impact of soil nitrogen(N)distribution and root growth ... Single-time fertilization(STF)with controlled release blended fertilizer(CRBF)improves grain yield and nitrogen use efficiency(NUE)in rice production.However,the impact of soil nitrogen(N)distribution and root growth on rice yield and NUE under STF with CRBF remains unclear.Here,a two-year field experiment investigated the effects of two fertilizer types(normal urea(U)and CRBF)and two single-time fertilization methods(broadcast and side-deep fertilization)on the soil N distribution,plant N uptake,root characteristics,grain yield,and NUE.The results showed that CRBF under STF increased the averages of plant dry matter accumulation,N uptake,grain yield,nitrogen recovery efficiency(NRE),and nitrogen agronomic efficiency(NAE)by 8.29,21.85,10.57,79.28,and 74.8%compared to the other treatments,respectively.Side-deep fertilization with CRBF further increased NUE by 12.78%compared to broadcast.Moreover,CRBF under STF increased the leaf SPAD value and glutamine synthetase(GS)/glutamine oxoglutarate aminotransferase(GOGAT)activity by 5.93 and 25.58%,respectively.CRBF under STF increased the soil inorganic N concentration and showed a“rising early and stabilizing later”pattern.In addition,CRBF under STF improved rice root growth and increased the averages of root biomass,total root number,root average diameter,total root length,total root surface area,and total root volume by 28.30,28.56,18.64,13.38,35.26,and 37.06%,respectively,at the tillering and heading stages.Partial least squares path modeling indicated that CRBF under STF increased the soil inorganic N concentration which improved root morphology,thereby increasing N uptake and improving the rice yield and NUE.Taken together,our findings show that CRBF with single-time fertilization is the preferred N fertilizer strategy for achieving high yield and efficiency in rice,and that side-deep fertilization is the optimal fertilization method. 展开更多
关键词 yield nitrogen use efficiency controlled release blended fertilizer soil nitrogen distribution root
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Characterizing soil shrinkage and soil-water retention behaviors of clayey soils with pore-size distribution and microstructure evolution 认领 引用 被引量：2
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作者 Sheng'ao Jia De'an Sun Pan Chen 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第5期3934-3948,共15页
The soil-water retention and soil shrinkage characteristics are both crucial constitutive relations for unsaturated soils.Although existing research has explored the correlation between these two characteristics to so... The soil-water retention and soil shrinkage characteristics are both crucial constitutive relations for unsaturated soils.Although existing research has explored the correlation between these two characteristics to some extent,the underlying mechanisms remain inadequately investigated.To investigate the correlation between the soil-water retention and soil shrinkage behavior,a series of soil-water retention and soil shrinkage tests is performed on compacted clays over a wide suction range(0–367 MPa).The test results show that the pore water in compacted clays is first expelled from large pores in low suction range.The drainage of pore water at low suctions is predominantly responsible for the phase of structural shrinkage in the soil shrinkage curve.The consistency between the characteristic transitional water contents in the soil shrinkage curve(SSC)and the inflection points in the soil-water retention curve(SWRC)is identified for all the compacted clays.The bimodal pore-size distributions(PSDs)of different clayey soils are obtained using the mercury intrusion porosimetry.The bimodal pore-size distribution characterization is the intrinsic factor in shaping the bimodal morphology in the SWRC over a wide suction range.The low proportion of micropores in clays is responsible to the indistinct zero-shrinkage stage of the SSC.The microstructure measured by the scanning electron microscope indicates the manifestation of aggregation effects during desaturation process.The results demonstrate that soil shrinkage is primarily caused by the contraction of inter-aggregate pores,rather than the evolution of intra-aggregate pores.The findings can greatly enhance the understanding of the soil-water retention and mechanical behavior of compacted clays in varying water content conditions. 展开更多
关键词 Clayey soil Soil shrinkage Soil-water retention Pore-size distribution Microstructure
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Global coal-rock gas resource potential and distribution 认领 引用 被引量：1
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作者 LI Guoxin CHEN Ruiyin +7 位作者 WEN Zhixin ZHANG Junfeng HE Zhengjun FENG Jiarui KANG Hailiang MENG Qingyang MA Chao SU Ling 《Petroleum Exploration and Development》 SCIE 2026年第1期16-30,共15页
Based on the data of regional geology,seismic,drilling,logging and production performance obtained from 94 major petroliferous basins worldwide,the global coal resources were screened and statistically analyzed.Then,u... Based on the data of regional geology,seismic,drilling,logging and production performance obtained from 94 major petroliferous basins worldwide,the global coal resources were screened and statistically analyzed.Then,using established definition methods and evaluation criteria for coal-rock gas in China,and by analogy with the tectono-sedimentary and burial-thermal evolution conditions of coal rocks in sedimentary basins within China,the geological resource potential of global coal-rock gas was estimated mainly by the volume method,partly by the volumetric method in selected regions.According to the evaluation indicator system comprising 14 parameters under 5 categories and the associated scoring criteria,the target basins were ranked,and the future research targets for these basins were proposed.The results reveal that,globally,coal rocks are primarily formed in four types of swamp environments within four categories of prototype basins,and distributed across five major coal-forming periods and eight coal-accumulation belts.The total geological coal resources are estimated at approximately 42×1012t,including 22×1012t in the strata deeper than 1500 m.The global geological coal-rock gas resources in deep strata are roughly 232×1012m3,of which over 90%are endowed in Russia,Canada,the United States,China and Australia,with China contributing 24%.The top 10 basins by coal-rock gas resource endowment,i.e.Alberta,Kuznetsk,Ordos,East Siberian,Bowen,West Siberian,Sichuan,South Turgay,Lena-Vilyuy and Tarim,collectively hold 75%of the global total.The Permian,Cretaceous,Carboniferous,Jurassic,and Paleogene-Neogene account for 32%,30%,18%,10%,and 7%of total coal-rock gas resources,respectively.The 10 most practical basins for future coal-rock gas exploration and development are identified as Alberta,Ordos,Kuznetsk,San Juan,Sichuan,East Siberian,Rocky Mountain,Bowen,Junggar and Qinshui.Propelled by successful development practices in China,coal-rock gas is now entering a phase of theoretical breakthrough,technological innovation,and rapid production growth,positioning it to spearhead the next wave of the global unconventional oil and gas revolution. 展开更多
关键词 coal coal-rock gas geological resources resource potential basin type resource distribution gas content
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Optimizing nitrogen application and planting density improves yield and resource use efficiency via regulating canopy light and nitrogen distribution in rice 认领 引用 被引量：1
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作者 Zichen Liu Liyan Shang +8 位作者 Shuaijun Dai Jiayu Ye Tian Sheng Jun Deng Ke Liu Shah Fahad XiaohaiTian Yunbo Zhang Liying Huang 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2026年第1期81-91,共11页
Coordinating light and nitrogen(N)distribution within a canopy is essential for improving rice yield and resource use efficiency.However,limited research has examined light and N distribution in response to planting d... Coordinating light and nitrogen(N)distribution within a canopy is essential for improving rice yield and resource use efficiency.However,limited research has examined light and N distribution in response to planting density and N rate,and their relationships with grain yield,radiation use efficiency(RUE),and N use efficiency for grain production(NUEg)in rice.A two-year field experiment was conducted with two hybrid varieties under three N levels,0 kg ha-1(N1),90 kg ha-1(N2)and 180 kg ha-1(N3),and two planting densities,22.2 hills m-2(D1)and 33.3 hills m-2(D2).Results showed 3.4%higher yield and 4.4%higher NUEg under N2D2 compared with N3D1.The extinction coefficient for N(KN)and light(KL)and their ratio(KN/KL)at heading stage were significantly influenced by N rate,planting density,and their interaction.KNdecreased with the increase of N input or planting density.Compared to N1,KNdecreased by 43.5 and 58.8%under N2 and N3,respectively,while KNunder D2 decreased by 16.0%compared to D1.Higher KLand KN/KLvalues occurred under low N rates,with opposite trends under high N rates.Increased planting density led to decreased KLand KN/KLvalues.N2D2 demonstrated higher KLand KN,and thus comparable KN/KL,compared to N3D1.Correlation analysis revealed KLnegatively correlated with RUE,while KNand KN/KLpositively correlated with NUEg.These findings indicate that increasing planting density under reduced N input could maintain rice yield while enhancing resource use efficiency through regulation of canopy light and N distribution. 展开更多
关键词 canopy light and N distribution nitrogen input planting density high yield and high efficiency hybrid rice
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Spatial variability of bimodal sea level distribution in the northern South China Sea 认领 引用
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作者 Gaojin Li Yajun Wang +4 位作者 Huayang Cai Shuxian Wang Tongtiegang Zhao Kairong Lin Yonggang Cao 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2026年第4期72-90,共19页
Understanding the spatial variability of sea level distributions is essential for revealing tidal dynamics.However,the statistical structures and physical drivers underlying this spatial variability remains unclear.He... Understanding the spatial variability of sea level distributions is essential for revealing tidal dynamics.However,the statistical structures and physical drivers underlying this spatial variability remains unclear.Here,we apply the bimodalcoupling general unit hydrograph(BC-GUH)model to tide-gauge records from Global Extreme Sea Level Analysis(GESLA-3)and satellite altimetry data from TOPEX/Poseidon-Jason missions,and extract four physically interpretable parameters:modal dominance,modal location,scale,and shape to quantify the probabilities of low-water-level(LWL)and high-water-level(HWL)events in the northern South China Sea(NSCS).The analysis reveals that sea level distributions across the NSCS exhibit coherent but regionally distinct patterns.Specifically,the probabilities of LWL and HWL are systematically organized by tidal propagation pathways,shoreline confinement,and basin resonance.In narrow straits such as the Taiwan Strait,exceptionally large tidal ranges sustain HWL dominance,whereas in the Zhujiang River(Pearl River)Estuary,river-tide interaction may compress the modal range and enhance asymmetry toward persistent HWL events.By contrast,the Beibu Gulf shows amplified LWL dominance due to semi-enclosed basin resonance,while offshore basins are characterized by weak but stable LWL modes that may be locally reorganized by reefs and typhoon forcing.These findings demonstrate that the BC-GUH framework directly links statistical parameters to physical tidal dynamics by explicitly relating their spatial variability to distinct tidal propagation pathways,geomorphological confinement,and basin-scale resonance regimes,offering a unified description of bimodal sea level variability.The approach provides new insights into how geomorphology and hydrodynamic setting shape the probability of extreme events,thereby improving the capacity to assess coastal and estuarine risks under changing environmental conditions. 展开更多
关键词 bimodal distribution sea level distribution extreme water level events tidal dynamics
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State-Resolved Ar II Population Distributions under Femtosecond Strong-Field Excitation 认领 引用
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作者 Di Wang Yuxuan Zhang +7 位作者 Zhigang Zheng Mingyue Wang Zhihui Lv Li Wang Xiaowei Wang Dongwen Zhang Jing Zhao Zengxiu Zhao 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第6期22-26,共5页
We measure spontaneous emission from Ar II ions produced by femtosecond strong-field excitation of argon and reconstruct state-resolved excited-state populations from selected emission lines spanning upper-level energ... We measure spontaneous emission from Ar II ions produced by femtosecond strong-field excitation of argon and reconstruct state-resolved excited-state populations from selected emission lines spanning upper-level energies of~19-23 eV above the Ar II ground state.The ionic-line intensities follow a power-law dependence on pulse energy and a non-monotonic dependence on gas pressure,and the extracted populations deviate significantly from a Boltzmann distribution.The deviation grows with increasing pulse energy,reflecting a stronger nonequilibrium character of the initial population prepared by the strong field,and weakens with increasing gas pressure,consistent with collisional redistribution driving the system toward thermal equilibrium.These results establish ionic fluorescence as a practical state-resolved probe of nonequilibrium population distributions in strong-field-ionized argon. 展开更多
关键词 femtosecond strong field excitation AR II ions emission lines boltzmann distributionthe spontaneous emission ionic line intensities population distributions state resolved
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Distribution and influencing factors of soil and groundwater pollution at pharmaceutical sites in China 认领 引用
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作者 Ying Hou Yi Shi +10 位作者 Weiguang Zhao Yifei Liu Nuchao Xu Hongxia Hu Haoyuan Wang Meng Yu Bochao Zhang Guizhen Hao Hongguang Zheng Juejun Yao Aizhong Ding 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第8期690-699,共10页
Owing to the rapid development of the pharmaceutical industry in China,contamination at legacy sites has become a major challenge that threatens the ecological environment and human health.Despite this growing concern... Owing to the rapid development of the pharmaceutical industry in China,contamination at legacy sites has become a major challenge that threatens the ecological environment and human health.Despite this growing concern,the distribution characteristics of contaminants at these legacy sites remain unclear.Therefore,we conducted a systematic analysis of the distribution characteristics,influencing factors,and health risks of soil and groundwater pollution at the legacy sites of 21 pharmaceutical enterprises.The results obtained identified heavy metals(As,Hg,and Pb),volatile organic compounds(VOCs)(benzene and trichloromethane),semi-volatile organic compounds(SVOCs)(benzo[a]pyrene),and inorganic salts(ammonia nitrogen and fluoride)as the major contaminants at the legacy sites.Heavy metals were primarily distributed in fill and clay layers,while the distribution of VOCs,which showed stronger vertical migration,was more diverse.Additionally,the vertical distribution pattern of the pollutants was primarily influenced by their production history,physicochemical properties,and site hydrogeological conditions.Via health risk assessment,As,Hg,and benzene were identified as major pollutants in terms of carcinogenic and non-carcinogenic risks,with the carcinogenic and non-carcinogenic(HI)risks of As(maximum value 2.97×10-3)and benzene(HI up to 10,200)significantly exceeding acceptable levels.Human exposure pathways included soil ingestion,air inhalation,and dermal contact.Overall,these findings serve as a reference for decision-making in risk identification and the development of pollution management and remediation strategies for legacy sites in the pharmaceutical industry. 展开更多
关键词 Pharmaceutical sites Soil-groundwater Vertical distribution Influencing factors Human health risks
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Phase composition of slag-iron interface and elemental distribution behavior between hot metal and Ti-bearing electric furnace slags 认领 引用
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作者 Jian-fa JING Yu-feng GUO +3 位作者 Shuai WANG Feng CHEN Ling-zhi YANG Guan-zhou QIU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2026年第4期1320-1334,共15页
The phase composition at the slag-iron interface and the distribution behavior of titanium,vanadium,chromium and silicon between hot metal and Ti-bearing electric furnace slag were thoroughly explored.The basicity ran... The phase composition at the slag-iron interface and the distribution behavior of titanium,vanadium,chromium and silicon between hot metal and Ti-bearing electric furnace slag were thoroughly explored.The basicity range for the anosovite phase region was defined by using a phase diagram and a minimum smelting temperature was set at 1540℃.Thermodynamic calculations demonstrate that the activities of TiO2 and SiO2 in the slag decrease with increasing basicity,while those of V2O3 and Cr2O3 increase.Similarly,the activities of[Ti]and[Si]in the molten metal decrease,while those of[V]and[Cr]rise with increasing basicity.As basicity increases,the distribution ratios,LTi and LSi decrease,whereas LV and LCr increase.Significantly,the recovery efficiencies of vanadium and titanium are improved with higher basicity.The primary phases identified in the slag include anosovite,diopside,and titanium spinel.However,when the basicity exceeds 0.8,the formation of the perovskite phase becomes less favorable,suggesting that basicity should be maintained at or below 0.8. 展开更多
关键词 slag-iron interface elemental distribution coefficients smelting temperature anosovite activity
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Characteristics of regionalized distribution of antibiotics and ARGs in Daliao River-Liaodong Bay waters and their environmental impact factors 认领 引用
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作者 Bing Li Hui Gao +3 位作者 Ruijing Li Xuan Jia Wenjun Yao Ziwei Yao 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第2期722-731,共10页
This paper takes the water body of Daliao River-Liaodong Bay as the research object,divides it into three regions:river,estuary,and offshore,and analyzes the changes of antibiotics and antibiotic resistance genes(ARGs... This paper takes the water body of Daliao River-Liaodong Bay as the research object,divides it into three regions:river,estuary,and offshore,and analyzes the changes of antibiotics and antibiotic resistance genes(ARGs)from inland rivers to the sea and the environmental impact factors from this perspective.The results showed that in general,the pollution of antibiotics and ARGs in Daliao River-Liaodong Bay belonged to the medium-low level,and levels of antibiotics and ARGs were nd–106.23 ng/L and nd–1.95×108copies/L,respectively.The concentrations and types of antibiotics and ARGs decreased from inland to sea regions.Analysis of the distributional characteristics of antibiotics and ARGs from a regionalized perspective revealed significant differences among the three regions in sulfonamide antibiotics,tetracycline antibiotics,and dominant ARGs.Sulfonamide antibiotic levels were significantly higher in the estuarine zone than in the riverine and offshore zones;tetracycline antibiotic levels were significantly higher in the riverine and estuarine zones than in the offshore zone.Aminoglycosides were dominant in the riverine and estuarine zones,and macrolides were dominant in the offshore zone.We characterized the effects of environmental factors on the assignment of antibiotics and ARGs and found that overall temperature contributed the most to variation in antibiotics and ARGs;the contribution of dissolved oxygen was the lowest.The estuarine zone was most affected by these factors,followed by the offshore zone and finally the riverine zone. 展开更多
关键词 Daliao River-Liaodong Bay Antibiotics Antibiotic resistance gene ARGs Occurrence distribution Environmental factor
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Effects of internal parts on burden distribution and segregation in bell-less top blast furnace 认领 引用
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作者 Wang Zeng Ye-Han Fang +6 位作者 Zuo-Bang Chen De-Sheng Zou Guang-Liang Wang Yun-Peng Si Heng Zhou Tian-Xiang Zhang Ming-Yin Kou 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2026年第4期241-255,共15页
As the key equipment connecting the feeding belt to the top of blast furnace,the structure of the hoppers directly affects the burden distribution in blast furnace throat.Therefore,it is of great significance to explo... As the key equipment connecting the feeding belt to the top of blast furnace,the structure of the hoppers directly affects the burden distribution in blast furnace throat.Therefore,it is of great significance to explore the suitable structure of the hoppers to optimize the burden and gas distribution of the blast furnace and improve the gas utilization rate.A three-dimensional model of a 1:1 bell-less top blast furnace with serial-type hoppers was established based on the discrete element method,which simulates the entire movement process of the burden from the belt to each hopper and then to the throat.The effects of internal components,such as the distributor,guiding cone,and buffer platform,on particle size segregation in the upper hopper,the weighing hopper,and the throat of the blast furnace were investigated.The results indicate that removing the distributor can reduce the burden segregation during the discharge from the weighing hopper.The guiding cone significantly influences the radial particle size distribution within the weighing hopper and its discharge.Eliminating the buffer platform promotes a more uniform burden distribution both in the weighing hopper and the throat of the blast furnace.Among the conditions investigated,removing the distributor and the buffer platform yields the best distribution,with the segregation index improved by 92%compared to the base model,which is recommended for practical operations. 展开更多
关键词 Blast furnace Burden distribution Segregation Internal part Discrete element method
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Distribution patterns of three Pyrus species under climate change in China based on ensemble modeling 认领 引用
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作者 LIU Chao TIAN Luming +6 位作者 DONG Xingguang ZHANG Ying QI Dan HUO Hongliang XU Jiayu YANG Xiang CAO Yufen 《Journal of Mountain Science》 SCIE CSCD 2026年第7期3058-3070,共13页
Climate change is profoundly affecting global ecosystems and biodiversity,with fruit trees being one of the plant groups relatively sensitive to climate change.China is one of the centers of diversity for the genus Py... Climate change is profoundly affecting global ecosystems and biodiversity,with fruit trees being one of the plant groups relatively sensitive to climate change.China is one of the centers of diversity for the genus Pyrus,harboring abundant wild and cultivated germplasm resources.However,systematic assessments of the responses of Pyrus species to future climate change at the national scale in China using species distribution modelling remain limited.In this study,we compiled 153 occurrence records of Pyrus betulifolia,47 of Pyrus pyrifolia,and 117 of Pyrus ussuriensis,and integrated climatic,soil,topographic,and anthropogenic variables.A biomod2-based ensemble modelling framework was used to predict potential suitable habitats under current and future climate scenarios and to identify key environmental drivers.The results showed that temperature seasonality(Bio4)was the dominant factor influencing the distributions of P.betulifolia and P.ussuriensis,whereas precipitation of the warmest quarter(Bio18)was the primary driver of P.pyrifolia.Under current climatic conditions,highly suitable habitats accounted for 4.04%,10.93%,and 13.07%of China’s land area for the three species,respectively.Under future climate scenarios,the suitable distributions of P.betulifolia and P.pyrifolia shift northward,whereas the suitable distribution of P.ussuriensis shifts westward.Meanwhile,the suitable habitat areas of all three species are projected to expand to varying degrees. 展开更多
关键词 Ensemble model Pyrus Climate change Satisfactory habitat Species distribution mode
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Branch architecture of Tetraena mongolica Maxim. controls particle size distribution of nebkha sediments 认领 引用
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作者 ZHAI Bo DANG Xiaohong +3 位作者 LIU Jing LIU Xiangjie CHEN Xiaona LIU Yajing 《Journal of Arid Land》 SCIE CAS CSCD 2026年第5期851-867,共17页
The formation of desert shrub sand piles(nebkhas)is attributed to the obstruction and subsequent deposition of migrating sand by the shrub itself.However,the relationship between sediment particle size distribution an... The formation of desert shrub sand piles(nebkhas)is attributed to the obstruction and subsequent deposition of migrating sand by the shrub itself.However,the relationship between sediment particle size distribution and shrub branch architecture remains inadequately understood.In August 2020,field investigations were conducted on Tetraena mongolica Maxim.shrubs in the Bayan Engger Desert Nature Reserve,located on the Ordos Plateau in Inner Mongolia Autonomous Region,China.Crown morphological parameters of T.mongolica shrubs and associated nebkhas were systematically measured alongside branch architectures.A one-way analysis of variance(ANOVA)was used to identify differences in branch architectures among various levels,while correlation analysis and model fitting were applied to establish the relationship between crown and nebkha morphological parameters.Path analysis was utilized to identify the key branch architectures that influence crown development.Furthermore,sediment redistribution characteristics of nebkhas were quantified,and principal component analysis combined with regression models was utilized to elucidate the contributions of key branch architectures and sensitive particle size fractions to nebkha deposition.Results indicated that the step-by-step branch ratio(SBR)initially increased from the lower branches to the outermost branches before subsequently decreasing.Additionally,branch angle significantly increased(P<0.0500),whereas both the branch length and the ratio of branch diameters(RBD)significantly decreased toward the exterior of the shrub(P<0.0500).Expansion of crown area significantly enhanced nebkha volume,demonstrating a strong linear relationship(P<0.0010).As the primary contact surface for trapping wind-blown sand,the silhouette area of the shrub initially increased and then decreased from bottom to top.Notably,the silhouette area of the 10-30 cm height layer played a crucial role in promoting nebkha volume expansion(P<0.0100).Path analysis further revealed that the key branch architectures promoting crown area expansion were the step-by-step branch ratio between the third-level and fourth-level branches(SBR3:4),followed by the fourth-level branch length(BLL4),the third-level branch angle(BAL3),and the ratio of branch diameters between the fourth-level and third-level branches(RBD4:3).Under the continuous interception of sediments by branches and leaves,the proportion of surface sediment with a particle size of 100.00-250.00μm reached 51.07%,indicating a significant increase in fine-sized particles.Further analysis confirmed that SBR3:4,BLL4,BAL3,and sediments within the 50.00-100.00μm particle size range were the primary contributors to nebkha deposition.These results demonstrate that the branch characteristics of T.mongolica shrubs near the ground surface promote fine sediment accumulation and nebkha development by regulating crown expansion.The findings reveal the unique adaptation mechanisms of rare and endangered plants in nebkha microhabitats and provide a scientific basis for ecological windbreak and sand-fixation projects in the desert transition zones of arid and semi-arid regions. 展开更多
关键词 Tetraena mongolica Maxim. nebkhas branch architecture particle size distribution nebkha formation Ordos Plateau
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Plasticity in within-plant distribution patterns allows aphids to optimize their fitness under contrasting interactions with protective ants and predatory ladybugs 认领 引用
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作者 Tian Xu Yao Chen +3 位作者 Meng Xu Xinyi Li Ted C.J.Turlings Li Chen 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2026年第5期2003-2013,共11页
Phenotypic plasticity is a crucial adaptive strategy that allows organisms to respond to environmental changes.Many aphids have evolved mutualistic relationships with ants,whereby aphids provide honeydew in exchange f... Phenotypic plasticity is a crucial adaptive strategy that allows organisms to respond to environmental changes.Many aphids have evolved mutualistic relationships with ants,whereby aphids provide honeydew in exchange for protection from natural enemies.Such ant-aphid mutualisms are often facultative and aphid colonies must often cope without ants.We show here that attendance by red imported fire ants,Solenopsis invicta,alters the within-plant distribution of cotton aphids(Aphis gossypii),resulting in fewer aphids on leaves and more on the stem,petioles,and sprouts(SPS) of cotton seedlings compared to colonies without ant attendance.The nitrogen contents in stems and sprouts were higher than in leaves,which may be a reason for the significantly higher population growth in ant-tended colonies.In contrast,exposure to the signals of a predatory ladybug,Coccinella septempunctata,resulted in a remarkably smaller aphid colony size,with lower proportions of aphids distributed on SPS,but a higher proportion on the leaves,compared to those in the predator-free colonies.In addition,ladybug predation risk is considerably higher on SPS than on leaves,and aphids showed rapid positional shifts from stems to leaves upon direct exposure to a ladybug,highlighting their ability to respond swiftly to predator presence.Our findings reveal that adaptive plasticity in aphid distribution patterns enables aphid colonies to optimize their fitness by responding to the presence of mutualistic ants or predatory threats with flexibility. 展开更多
关键词 ant-aphid mutualism natural enemy phenotypic plasticity within-plant distribution
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Spatial and temporal distribution characteristics of low-visibility phenomena in Xinjiang based on instrument measurements 认领 引用
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作者 WANG Xiuqin NING Jinge +3 位作者 AN Dongliang LU Xinyu WANG Minzhong WU Chunxia 《Journal of Mountain Science》 SCIE CSCD 2026年第3期1006-1024,共19页
Low-visibility phenomena strongly impact the environment,as well as transportation,aviation and other fields that are closely related to people's livelihoods;thus,they represent important ecological issues of soci... Low-visibility phenomena strongly impact the environment,as well as transportation,aviation and other fields that are closely related to people's livelihoods;thus,they represent important ecological issues of social concern.Based on observation data concerning low-visibility phenomena derived from 105 national meteorological stations in Xinjiang,China over the past 20 years,we systematically analyzed the differences between manual and instrument observations for six types of low-visibility phenomena,with a focus on exploring their spatiotemporal distribution characteristics using instrument data.The results revealed that low-visibility phenomena were dominated by fog-and haze-related events(mist,fog,and haze)in northern Xinjiang and dust-related events(dust storms,blowing sand,and floating dust)in southern Xinjiang,with transitional characteristics observed in eastern Xinjiang.Compared with manual observations,the instrument measurements significantly improved the fine-scale low-visibility phenomenon identification process.On the basis of the instrument observation data,spatial-dimension analysis results indicated that low-visibility phenomena in Xinjiang were significantly influenced by terrain factors.Constrained by the Tianshan Mountains,haze-like phenomena formed a core agglomeration area in northern Xinjiang,whereas dust-and sand-related phenomena radiated outward,with the Taklimakan Desert at the center.Moreover,the gripping effect of the terrain promoted dust transmission along low-altitude channels.Temporally,fog-and haze-related phenomena occurred mainly during autumn and winter,and the proportion of these events decreased from 76.7%to 55.1%.The fog-and haze-related phenomena demonstrated a U-shaped rebound trend,while the proportion of mist phenomena decreased by 34.2%.Dust storms occurred during spring,accounting for 23.3%to 44.9%of all storms.Instrument measurement technology has the advantages of high spatial and temporal resolutions and multiparameter coordination but provides a limited dust-haze mixed-pollution identification capacity.This study provides crucial reference data for enhancing the understanding of low-visibility events in Xinjiang and the potential responses while improving the accuracy of pollution source tracking and meteorological process diagnosis tasks. 展开更多
关键词 Instrument measurement Low visibility Distribution Xinjiang
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Insight into the impact of the Al distribution in ZSM-5 zeolite on deep hydrogenation of phenanthrene over Pt/HZSM-5 认领 引用
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作者 Chuan-Hao Zhang Qi Dong +4 位作者 Fei Wang Ning-Yue Lu Feng Yu Bin-Bin Fan Rui-Feng Li 《Petroleum Science》 SCIE EI CAS CSCD 2026年第1期475-485,共11页
Deep hydrogenation of polycyclic aromatic hydrocarbons(PAHs)into jet fuel is an important strategy for the upgrading of light cycle oil(LCO).Zeolite-supported metal catalysts have exhibited good catalytic performance ... Deep hydrogenation of polycyclic aromatic hydrocarbons(PAHs)into jet fuel is an important strategy for the upgrading of light cycle oil(LCO).Zeolite-supported metal catalysts have exhibited good catalytic performance for hydrogenation of PAHs under relatively mild conditions.However,the impacts of acidity variations in zeolite supports,arising from the differences in framework Al(AlF)distribution on the catalytic behavior of zeolite-sup ported metal catalysts in the deep hydrogenation of PAHs remains unclear.Herein,two series of mesoporous ZSM-5 samples,that is ZSM-5-E-x and ZSM-5-F-x,with the differences in AlFdistribution but similar Si/Al ratios,were prepared in the crystallization system with or without NaOH.The results of NH3-TPD,Pyridine-IR,N2 adsorption-desorption and SEM reveal that two series of HZSM-5 samples have similar acid density and acid strength,textural properties,morphology and particle size.However,the results of XPS,27Al MAS NMR,2,6-Ditert-butylpyridine-IR,catalytic cracking of 1,3,5-triisopropylbenzene and the controlled reactions as well as DFT calculation indicate that the higher enrichment degree of AlFon the external surface and the suitable arrangement mode of Alp in ten-membered ring(10-MR)of HZSM-5-F-x compared to HZSM-5-E-x in case of the similar Si/Al ratios,result in Pt/HZSM-5-F-x exhibiting remarkably-improved deep hydrogenation performance of phenanthrene(PHE)compared to Pt/HZSM-5-E-x.Particularly,the selectivity to perhydrophenanthrene(PHP)over Pt/HZSM-5-F-50 can reach above 99.0%at a conversion of PHE(>99.0%).Furthermore,Pt/HZSM-5-F-50 exhibits well reusability.This work helps to clarify the impact of AlFdistribution in ZSM-5 on catalytic hydrogenation performance for PAHs,providing valuable guidance for design and development of efficient catalysts for the hydrogenation of PAHs. 展开更多
关键词 Zeolite ZSM-5 Al distribution Pt/HZSM-5 Phenanthrene Deep hydrogenation
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Distribution,assessment,and sources of nutrients in river water in the headwaters of the Shule River Basin,Northeastern Qinghai-Tibet Plateau 认领 引用
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作者 Qin Yang Donghui Shangguan +2 位作者 Tianding Han Da Li Asim Qayyum Butt 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第1期502-511,共10页
Nitrogen(N)and phosphorus(P)are essential nutrients and can significantly impact primary productivity of the ecosystem causing water environmental problems.However,their cycling mechanisms are not well understood in a... Nitrogen(N)and phosphorus(P)are essential nutrients and can significantly impact primary productivity of the ecosystem causing water environmental problems.However,their cycling mechanisms are not well understood in alpine mountains with climate change.Hence,94 samples of river water were collected from 2018 to 2020 in the headwaters of the Shule River Basin to assess the nutrients spatiotemporal distribution and combined ap-proach of water quality index to assess water quality and potential sources.The findings depict that high nutrient concentrations were found to coincide with snowmelt and glacial meltwater and rainfall recharge periods,while total flux peaked from June to September due to increased runoff.Notably,total nitrogen(TN)concentrations were significantly higher near the town,primarily attributed to the replenishment of nitrate(NO3‒-N)from live-stock manure.The high total P(TP)was near the glacier,which was attributed to the transportation of glacial sediments into the river,and pH was another critical factor.N was the primary nutrient limiting factor for the growth of phytoplankton in river water.Although the migration and transport of nutrients have altered with climate change,river water quality is good in alpine mountains based on an overall evaluation.These findings contribute to enriching nutrient datasets and highlight the importance of water resource management and water quality assessment in sensitive and fragile alpine mountains. 展开更多
关键词 Nutrients Spatiotemporal distribution Water quality assessment Potential sources Alpine mountains
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Designing an air electrode for dual ceramic cells using an ionic Lewis acid strength polarization distribution strategy 认领 引用
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作者 Ying Zhang Yibei Wang +8 位作者 Zhilin Liu Yaowen Wang Zhen Wang Youcheng Xiao Bingbing Niu Xiyang Wang Guntae Kim Wenquan Wang Tianmin He 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第1期505-516,I0012,共12页
Ceramic cells promise ideal energy conversion and storage devices,making the development of efficient and robust air electrodes crucial for their application.In this study,a Ba0.4Sr0.5Cs0.1Co0.7Fe0.2Nb_... Ceramic cells promise ideal energy conversion and storage devices,making the development of efficient and robust air electrodes crucial for their application.In this study,a Ba0.4Sr0.5Cs0.1Co0.7Fe0.2Nb0.1O3−δ(BSCCFN)air electrode,based on Ba0.5Sr0.5Co0.8Fe0.2O3−δ(BSCF),is designed using a perovskite A-B-site ionic Lewis acid strength(ISA)polarization distribution strategy and is successfully applied in both oxygen-ion conducting solid oxide fuel cells(O-SOFCs)and proton-conducting reversible protonic ceramic cells(R-PCCs).When BSCCFN is used as the air electrode in O-SOFCs,a peak power density(PPD)of 1.45 W cm−2is achieved at 650°C,whereas in R-PCCs,a PPD of 1.13 W cm−2and a current density of−1.8 A cm−2at 1.3 V are achieved at the same temperature and show stable reversibility over 100 h.Experimental measurements and theoretical calculations demonstrate that low-ISA Cs+doping accelerates the reaction kinetics of both oxygen ions and protons,while high-ISA Nb5+doping enhances electrode stability.The synergistic effect of Cs+and Nb5+co-doping in the BSCCFN electrode lies in the ISA polarization distribution,which weakens the Co/Fe–O bond covalency,thereby promoting oxygen vacancy formation and facilitating the conduction of oxygen ions and protons. 展开更多
关键词 Air electrode Ceramic cell Electrochemical performance lonic Lewis acid strength polarization distribution Co/Fe-O bond
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A Nationwide Analysis of Key Environmental Determinants Shaping the Spatial Distribution of Kashin-Beck Disease in China 认领 引用
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作者 Fang Qi Ying Liu +9 位作者 Bing Zhang Qian Yu Songyao Zhang Haoyu Du Jiaxin Li Yue Zhao Chenxi Wang Jiayuan Li Silu Cui Jun Yu 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2026年第5期609-615,共7页
Kashin-Beck disease(KBD)is an endemic,deformative osteoarthropathy characterized by distinct geographic clusters[1].Historically,13 provinces and autonomous regions in China have been designated as KBD-affected areas.... Kashin-Beck disease(KBD)is an endemic,deformative osteoarthropathy characterized by distinct geographic clusters[1].Historically,13 provinces and autonomous regions in China have been designated as KBD-affected areas.In severely endemic areas,the radiographic detection rate had reached up to 80%[1].Although comprehensive prevention and control measures,including dietary restructuring,grain substitution,and relocation of educational facilities,have successfully halted new pediatric cases,the persistent threat posed by environmental risk factors suggests that the relaxation of these measures could lead to the resurgence of KBD. 展开更多
关键词 relocation educational facilitieshave radiographic detection dietary restructuringgrain Kashin Beck disease prevention control measuresincluding environmental determinants China spatial distribution
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A systematic review of dengue epidemiology in Indonesia:Ten-year trends in case distribution and viral serotype dynamics 认领 引用
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作者 Nastiti Wijayanti Radinal Kautsar +4 位作者 Felisitas Meli Podhi Fajar Sofyantoro Teguh Hari Sucipto I Made Dwi Mertha Adnyana Dominicus Husada 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2026年第4期148-164,共17页
Objective:To analyze the trends of dengue virus infection case distribution and dengue virus(DENV)serotype dynamics in Indonesia over the last decade through a spatio-temporal analysis and systematic literature review... Objective:To analyze the trends of dengue virus infection case distribution and dengue virus(DENV)serotype dynamics in Indonesia over the last decade through a spatio-temporal analysis and systematic literature review.Methods:A mixed-methods approach was used,combining a descriptive spatio-temporal analysis of national dengue surveillance data from 2014-2023 and a systematic literature review of the DENV serotypes distribution in Indonesia.The national dengue surveillance data from 2014-2023 were analyzed through spatio-temporal analysis using QGIS 3.28.3 to visualize the distribution of dengue hemorrhagic fever cases and mortality.The articles for systematic literature review were retrieved from three databases(Scopus,PubMed,and Garuda)within the same period,and their quality was assessed using the Joanna Briggs Institute Critical Appraisal Checklist for cross-sectional and experimental studies.Results:The highest number of cases occurred in 2016,and the lowest in 2018.The geographic spread of DENV transmission increased over time,reaching 484 affected districts in 2022.The highest case burden consistently occurred on Java Island(>10000 cases per year).All four serotypes were detected across regions with varying dominance,and DENV-3 was identified as the predominant serotype during the study period.High population density and human mobility were key factors influencing regional differences in serotype distribution,while the strong transovarial transmission capability of DENV-3 may contribute to its persistence within mosquito populations.Conclusions:Dengue virus infection in Indonesia demonstrates fluctuating trends with an expanding geographic distribution over the past decade.All four DENV serotypes continue to circulate nationwide,with DENV-3 remaining the predominant serotype.Variations in serotype dominance are likely influenced by population density,mobility,as well as the persistence of transovarial transmission within mosquito vectors.These findings highlight the importance of strengthening surveillance systems and implementing targeted control strategies to reduce dengue transmission in Indonesia. 展开更多
关键词 DENV infection Distribution Indonesia Serotype
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FragSAM:Near real-time rock fragment segmentation for size distribution analysis across diverse engineering domains 认领 引用
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作者 Yudi Tang Yulin Wang +4 位作者 Jixiong Zhang Runzhe Hu Changwei Wang Joung Oh Guangyao Si 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2026年第6期1167-1188,共22页
Rock fragment size distribution(FSD)plays an important role in various engineering applications,such as mining,tunnelling,and other underground construction scenarios.While vision-based deep learning approaches have b... Rock fragment size distribution(FSD)plays an important role in various engineering applications,such as mining,tunnelling,and other underground construction scenarios.While vision-based deep learning approaches have been increasingly applied to FSD analysis,they are often case-specific,showing limited cross-site generalization despite their accuracy.To address these challenges,FragSAM,an end-to-end,fully automated framework is proposed for near real-time rock fragment segmentation and FSD analysis across diverse engineering environments.FragSAM integrates the generalization power of Segment Anything Model(SAM)with a context-aware prompting mechanism and lightweight architecture for efficient dense fragment segmentation.In Stage 1,an enhanced SAM automatically generates high-quality annotations,which are used to train a modified CenterNet for precise centroid prediction.In Stage 2,these centroids serve as prompts for EdgeSAM,a lightweight SAM variant optimized for real-time inference.This two-stage design eliminates dense grid prompting and reduces reliance on heavy postprocessing,enabling efficient and scalable segmentation.Experimental results show that FragSAM achieves competitive segmentation performance with significantly lower latency and model complexity compared to existing SAM-based methods.In comparison with supervised learning approaches,it also demonstrates superior generalization and performs better in low-quality or unseen scenarios.Furthermore,case studies on blasting fragmentation,TBM muck,and coastal rock surfaces confirm its robustness and seamless cross-site adaptability,requiring no tuning or retraining,making it highly practical for on-site applications. 展开更多
关键词 Segment anything model Rock fragment size distribution FragSAM Prompt-based vision models Near real-time segmentation
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