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Interaction of soil microbial communities and phosphorus fractions under long-term fertilization in paddy soil

Journal of Integrative Agriculture 2022年第7期21卷 2134-2144页

作者： Muhammad QASWAR Waqas AHMED HUANG Jing LIU Kai-lou ZHANG Lu HAN Tian-fu DU Jiang-xue Sehrish ALI Hafeez UR-RAHIM HUANG Qing-hai ZHANG Hui-min National Engineering Laboratory for Improving Quality of Arable Land/lnstitute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesBeijing 100081P.R.China Department of Environment Faculty of Bioscience EngineeringGhent UniversityGhent 9000Belgium Guangdong Provincial Key Laboratory for Radionuclides Pollution Control and Resources School of Environmental Science and EngineeringGuangzhou UniversityGuangzhou 510006P.R.China National Observation Station of Qiyang Agri-ecology System/lnstitute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesQiyang 426182P.R.China National Engineering and Technology Research Center for Red Soil Improvement/Jiangxi Institute of Red Soil Nanchang 331717P.R.China Key Laboratory of Industrial Ecology and Environmental Engineering Ministry of Education/School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024P.R.China

Understanding the impact of biological activities on the soil phosphorus(P)distribution under long-term fertilizer application can facilitate better soil P fertility ***,the primary objectives of this study were to investigate the effect of long-term(since 1981)fertilizer application on the soil P fractions and microbial community and to evaluate correlations between the microbial community structure and P *** following treatments were implemented in a long-term field trial:no fertilization(CK),inorganic N and K(NK),inorganic P and K(PK),inorganic N,P and K(NPK)and manure+NPK(MNPK)*** study showed that the soil pH,soil organic carbon and total and available N and P concentrations were considerably higher in the MNPK treatment than in the CK *** soil microbial biomass C,N and P concentrations were also significantly higher in the MNPK treatment than in the CK *** fertilization treatments,theβ-1,4-glucosidase,α-1,4-glucosidase,urease,acid phosphatase and phosphodiesterase activities were the highest in the MNPK *** to inorganic fertilization,the MNPK treatment increased the labile soil P fractions and decreased the residual soil P *** fertilization significantly affected the soil microbial *** total phospholipid fatty acid(PLFA)concentrations in the NK,PK,NPK and MNPK treatments were 23.3,43.1,48.7 and 87.7%higher,respectively,than in the CK treatment.A significant correlation was observed between the microbial community and soil P ***,the aggregated boosted tree(ABT)model showed that among the various soil biochemical properties,the total PLFA concentration was the factor that most influenced the active P pool,accounting for 35.4%of the relative influence of all soil biochemical properties *** findings reveal that combined manure and inorganic fertilizer application is a better approach than applying inorganic fertilizer alone fo

关键词： enzyme activities long-term fertilization microbial community microbial biomass phosphorus fraction

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Using urban-suburban difference of atmospheric CO2 to evaluate carbon neutrality capacity in Hangzhou, China

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Journal of environmental sciences (China) 2025年 157卷 908-923页

作者： Qi, Bing Hu, Cheng Yu, Yan Pang, Yuting Wu, Fangqi Yang, Xinjie Liu, Huili Zhang, Junqing Xiao, Qitao Liu, Cheng Xiao, Wei Hangzhou Meteorological Bureau Hangzhou310051 China College of Ecology and Environment Joint Center for sustainable Forestry in Southern China Nanjing Forestry University Nanjing210037 China Zhejiang Lin'an Atmospheric Background National Observation and Research Station Hangzhou 311300 China Nanjing University of Information Science & Technology Nanjing210044 China Zhejiang Institute of Meteorological Sciences Hangzhou310052 China Linping Meteorological Bureau Hangzhou311199 China Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing210008 China Jiangxi Provincial Key Laboratory of Genesis and Remediation of Groundwater Pollution/School of Water Resources and Environmental Engineering East China University of Technology Nanchang330013 China

China is the largest emitter of anthropogenic CO2 globally, with its cities recognized as significant emission hotspots. Consequently, evaluating anthropogenic CO2 emissions and the carbon neutral capability (CNC) of Chinese cities is critical for climate change mitigation. Despite this importance, no studies to date have assessed recent and future city-scale CNCs using the top-down atmospheric inversion approach, revealing substantial knowledge gaps regarding regional CO2 budgets. To address these issues, this research focused on Hangzhou, a megacity known for having the highest forest cover among China's provincial capitals, as study region. Year-round atmospheric CO2 concentration measurements were conducted from December 2020 to November 2021 at two sites: one urban and one suburban. These observations, along with their difference, were utilized to derive city-scale posterior anthropogenic CO2 emissions and to evaluate recent and future CNCs. Our key findings are as follows: (1) The manufacturing industry, energy industry and oil refineries/transformation industry were identified as the largest contributors to urban-suburban CO2 difference, accounting for 36.5 %, 21.3 %, and 16.6 %, respectively. Additionally, 82.5 %, 65.2 %, 81.2 % and 86.3 % of total anthropogenic CO2 enhancements were attributed to emissions within Hangzhou city in winter, spring, summer and autumn, respectively. (2) The posterior annual anthropogenic CO2 emission for Hangzhou was estimated at 4.65 (±0.72) × 1010 kg/a, indicating significant biases among different prior CO2 emission inventories. The annual biological CO2 sink, derived from multiple products, was estimated at -0.48 (±0.16) × 1010 kg. (3) The calculated CNC for 2021 was 10.3 % ± 3.4 %, highlighting a substantial gap towards achieving full carbon neutrality. Considering potential increases in ecosystem carbon sinks due to forest age and uncertainties from climate change, it was predicted that at least 65.2 %-82.6 % of anthropoge

关键词： Kyoto Protocol

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Experimental Study of Temperature Profile in Underground Corridor of Different Ventilation Conditions Induced by Fire in an Adjacent Compartment

SSRN

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SSRN 2023年

作者： Chen, Xiaotao Sun, Xiepeng Zhang, Xiaolei Fang, Xiang Yi, Jiwei State Key Laboratory of Fire Science University of Science and Technology of China Anhui Hefei China State Key Laboratory of Building Safety and Built Environment Beijing China National Engineering Research Center of Building Technology Beijing China

Corridor-compartment fire is an important transition of fire at the compartment to the corridor, it could be divided into two Regimes: over-ventilated condition (there is no flame ejected through the compartment-opening/door) and under-ventilated condition (the flame ejects through the door into the corridor). It is a fundamental scientific problem in underground space, which is important for the firefighting and evacuation. Nevertheless, the relevant studies are still very limited for quantifying the temperature evolutions of corridor ceiling flow induced by corridor-compartment fire scenarios for various ventilation conditions (compartment-opening sizes, corridor-opening sizes and corridor widths) and fire heat release rate. In the present study, a reduced-scale corridor-compartment experimental model is established, with 3 compartment-opening (door) sizes, 5 corridor-opening (door) sizes and seventeen heat release rates. The temperature profile inside the corridor is measured and analyzed. Results show that: (1) In over-ventilated condition, the maximum temperature in the corridor is controlled by the convective HRR and compartment-opening size under the coupled effect of different ventilation conditions. It increases with the HRR and decreases with the compartment-opening size. (2) In under-ventilated condition, the maximum temperature in the corridor is controlled by the coupled effect of different ventilation conditions (compartment-opening sizes, corridor-opening sizes and corridor widths) and HRRs. It increases with the opening sizes (compartment/corridor-opening sizes) and HRR while decreases with the corridor widths. The temperatures of the ceiling flow at the corner between corridor wall and corridor ceiling decreases significantly with the corridor width increasing. (3) A non-dimensional temperature rise model in corridor which induced by fire in an adjacent compartment for various ventilation conditions and HRRs is proposed. This model could predict cor

关键词： Fires

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Evacuation based on spatio-temporal resilience with variable traffic demand

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Journal of Management science and engineering 2021年第1期6卷 86-98页

作者： Zhao Zhang Yanyue Liu Qingfeng Tong Shengmin Guo Daqing Li School of Transportation Science and Engineering Beihang UniversityNo.37 Xueyuan RoadHaidian DistrictBeijing100191China School of Reliability and Systems Engineering Beihang UniversityNo.37 Xueyuan RoadHaidian DistrictBeijing100191China National Key Laboratory of Science and Technology on Reliability and Environmental Engineering Beijing100191China State Key Laboratory of Software Development Environment Beihang UniversityNo.37 Xueyuan RoadHaidian DistrictBeijing100191China

The efficient evacuation of people from dangerous areas is a key objective of emergency ***,many emergencies give little to no advanced warning,leading to spontaneous evacuation with no time for planning or *** large emergencies,destinations become less certain,with traffic demand imbalanced and concentrated on a few oversaturated routes familiar to ***,this leads to rapid congestion and delay on some routes,while others remain barely used,extending clearance times with an accumulating population at *** this study we address these issues through incorporating spatio-temporal traffic resilience dynamics into a destination choice model utilizing the available capacity of the overall *** validate our model through a post-concert egress *** results suggest that our method can reduce total egress times and average travel time by 20%-43%over the no-guidance *** method can be used to estimate and quantify emergency conditions to optimally guide destinations and routing choice for evacuees and/or autonomously moving vehicles during evacuations.

关键词： Resilience Destination choice model Emergency evacuation Fundamental diagram

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An Ensemble Machine Learning Approach for Predicting Sources of Organic Aerosols Measured by Aerosol Mass Spectrometry

ACS ES&T Air

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ACS ES&T Air 2025年第3期2卷 378-385页

作者： Yunjiang Zhang Jie Fang Qingxiao Meng Xinlei Ge Hasna Chebaicheb Olivier Favez Jean-Eudes Petit Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and Engineering Nanjing University of Information Science and Technology Nanjing 210044 China；Institut National de l’Environnement Industriel et des Risques Verneuil-en-Halatte 60550 France Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and Engineering Nanjing University of Information Science and Technology Nanjing 210044 China Institut National de l’Environnement Industriel et des Risques Verneuil-en-Halatte 60550 France Laboratoire des Sciences du Climat et de l’Environnement CEA/Orme des Merisiers Gif sur Yvette 91191 France

Long-term source apportionment of atmospheric organic aerosols (OA) is essential for supporting air pollution management strategies. While aerosol mass spectrometry (AMS) combined with traditional source apportionment tools can accurately identify various OA sources, they face efficiency challenges when processing large volumes of long-term data. This study proposes an ensemble machine learning approach to efficiently apportion OA sources from long-term AMS measurements. Using six-year observation of a simplified version of AMS (i.e., ACSM) in the Paris region along with OA factor data derived from positive matrix factorization analysis, we developed an ensemble machine learning source apportionment model. Compared to individual machine learning algorithms, the ensemble model substantially reduced the root-mean-square error (RMSE) and increased the correlation coefficient in predicting OA sources by approximately 30% and 5%, respectively. Sensitivity analysis with five years of baseline data revealed that model performance relatively stabilizes when the training data exceeds two years, with RMSE values for primary and secondary OA factors at 0.31–0.45 μg/m3and 0.69–0.84 μg/m3, respectively. This ensemble model not only enhances the efficiency of long-term OA source apportionment but also holds potential for near-real-time online applications.

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Buried interface engineering towards stable zinc anodes for high-performance aqueous zinc-ion batteries

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science Bulletin 2025年第4期70卷 518-528页

作者： Qing Wen Hao Fu Chao Sun Rude Cui Hezhang Chen Ruihan Ji Linbo Tang Lingjun Li Jiexi Wang Qing Wu Jiafeng Zhang Xiahui Zhang Junchao Zheng School of Metallurgy and Environment Central South UniversityChangsha 410083China Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South UniversityChangsha 410083China National Energy Metal Resources and New Materials Key Laboratory Central South UniversityChangsha 410083China School of Chemistry and Chemical Engineering Hunan University of Science and TechnologyXiangtan 411201China School of Materials Science and Engineering Changsha University of Science and TechnologyChangsha 410114China National Engineering Research Centre of Advanced Energy Storage Materials Changsha 410205China School of Information and Network Center Central South University Changsha 410083China

The dendrite and corrosion issues still remain for zinc *** modification of anodes has been widely used for stabilizing zinc ***,it is still quite challenging for such modification to simultaneously suppress zinc dendrites and corrosion ***,we propose a new strategy of buried interface engineering to effectively stabilize Zn anodes,in which a zincophilic Sn layer is buried by a corrosion-resistant ZnS layer(SZS).The buried Sn layer has a strong adsorption energy towards Zn atoms,which accelerates the nucleation of Zn atoms and induces smooth ***,the outer ZnS layer protects the newly deposited zinc layer from the corrosion by the *** a result,the SZS@Zn symmetric cell demonstrates stable cycling for over 280 h compared to Bare Zn(41 h)at a high current of 10 mA cm^(-2)and a high areal capacity of 10 mAh cm^(-2).Besides,SZS@Zn//MnO2 full cells also achieve enhanced long-term cycling stability of 63.6%for 1000 cycles at a high rate of 10 C,compared to Bare Zn(47.2%).This work provides a new strategy of buried interface for the rational design of highly stable metal anodes for other metal batteries.

关键词： Zinc ion battery Zinc anode Buried interface Surface modification

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A Novel PN Weighted Timing Synchronization Algorithm in Ionospheric Scatter Channel

A Novel PN Weighted Timing Synchronization Algorithm in Iono...

引用

International Symposium on Antennas, Propagation and EM Theory (ISAPE)

作者： Xiaoming Niu Xiaonan Jiang Peng Wang Jian Ding Hong Wu National Key Laboratory of Electromagnetic Environment China Research Institute of Radiowave Propagation Qingdao China College of Electronic Information and optical Engineering Nankai University Tianjin China National Key Laboratory of Science and Technology on Communications University of Electronic Science and Technology of China Chengdu China China Research Institute of Radiowave Propagation Qingdao China

ISBN: (数字)9798350353129

ISBN: (纸本)9798350353136

Ionospheric scatter channel (ISC) exhibits a wide range of signal-to-noise ratio (SNR), so transmission systems may work at a low SNR, and ISC also has a severe frequency-selective fading, causing low detection probability. A novel pseudonoise (PN) weighted timing synchronization algorithm is proposed. The constant amplitude zero autocorrelation (CAZAC) is weighted by PN to constitute a two-stage preamble, by employing hierarchical correlation detection at the receiver to decline the computational complexity; before executing the conventional adaptive threshold algorithm (CATA), the proposed non-coherent combining is performed to accumulate the sub-peaks power on main peak to obtain the new peak, which enhances the discrimination between the new peak and background noise under low SNRs and dense multi-path channels. Simulation results show that compared to CATAs based on constant false alarm rate (CFAR), the detection probability is improved by approximately 2 dB.

关键词： Fluctuations Transmitters Simulation Power amplifiers Receivers Frequency-selective fading channels Approximation algorithms Synchronization Computational complexity Signal to noise ratio

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Comparative analysis of microplastic and microbial communities in varied aquatic environments: Disparities in occurrence, interconnections, and ecological implications

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Journal of Hazardous Materials 2025年 495卷 138795页

作者： Fu, Lingfang Guo, Yongxin Tang, Jialiang Yang, Mengdi Huang, Lu Xiao, Jieer Fan, Zhongya Wang, Zhongyang Zhi, Jiangyu Huang, Zhiwei Fang, Huaiyang Li, Ping National Key Laboratory of Water Environmental Simulation and Pollution Control Guangdong Key Laboratory of Water and Air Pollution Control South China Institute of Environmental Sciences Ministry of Ecology and Environment Guangzhou510655 China School of Environmental Science and Engineering Guangdong University of Technology Guangzhou510006 China School of Environment and Climate Jinan University Guangzhou510632 China

Detection of microplastics (MPs) in various water environments raises significant environmental concerns. However, comprehension of the differences in MPs and their linked biological communities across diverse water settings remains limited. This study explores MPs and their linked microbial communities in the Dongjiang River, Xingfengjiang Reservoirs, and Dayawan Bays watersheds. Our results revealed distinct community compositions of MPs in these three water environments, with higher abundance and diversity integrated index of MPs (p © 2025

关键词： Risk assessment

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High pressure plasma of pure oxygen

High pressure plasma of pure oxygen

引用

IEEE International Conference on Plasma science (ICOPS)

作者： W. Yan Z. M. Duan Z.B. Li X. L. Si Department of Electrical Engineering Hefei University of Techonolgy Hefei China National Key Laboratory of Electromagnetic Information Control and Effects Hefei China Aviation Science and Technology Key Laboratory of Strong Electromagnetic Environment Protection Technology Hefei China Anhui province key laboratory of aircraft lightning protection Hefei China

ISBN: (数字)9798350360912

ISBN: (纸本)9798350360929

In this paper, an equivalent model of electrostatic discharge was established for spark discharge in $0.1 \sim 5 \mathrm{MPa}$ oxygen environment. The effects of oxygen pressure, electrode gap and other parameters on plasma characteristics and space heat conduction were studied, and the results were compared with electrostatic discharge in air environment. The simulation results were in good agreement with the experiments, which can provide a reference for the study of electrostatic protection in oxygen system.

关键词： Electrodes Simulation Atmospheric modeling Electrostatic discharges Discharges (electric) Plasmas Sparks

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Development of biofertilizers for sustainable agriculture over four decades(1980-2022)

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Geography and Sustainability 2024年第1期5卷 19-28页

作者： Guangxu Zhao Xiaoling Zhu Gang Zheng Guangfan Meng Ziliang Dong Ju Hye Baek Che Ok Jeon Yanlai Yao Yuan Hu Xuan Jie Zhang Baolei Jia Xianghu Laboratory Hangzhou 311231China School of Bioengineering State Key Laboratory of Biobased Material and Green PapermakingQilu University of Technology(Shandong Academy of Sciences)Jinan 250000China Shandong Academy of Agricultural Sciences Jinan 250000China Taiji Group Chongqing 400000China Department of Life Science Chung-Ang UniversitySeoul 06974Republic of Korea Institute of Environment ResourceSoil and FertilizersZhejiang Academy of Agricultural SciencesHangzhou 310021China State Key Laboratory of Elemento-Organic Chemistry Department of Chemical BiologyNational Pesticide Engineering Research Center(Tianjin)Nankai UniversityTianjin 300071China

The application of biofertilizers is becoming an inevitable trend to substitute chemical fertilizers for sustainable *** better understand the development of biofertilizers from 1980 to 2022,we used bibliometric mining to analyze 12,880 journal articles related to *** network cooccurrence analysis suggested that the biofertilizers research can be separated into three *** first stage(1980-2005)focused on nitrogen *** second stage(2006-2015)concentrated on the mechanisms for increasing plant *** third stage(2016-2022)was the application of biofertilizers to improve the soil *** keyword analysis revealed the mechanisms of biofertilizers to improve plant-growth:biofertilizers can impact the nutritional status of plants,regulate plant hormones,and improve soil environments and the *** bacteria use as biofertilizers,included Pseudomonas,Azospirillum,and Bacillus,were also identified through bibliometric *** findings provide critical discernment to aid further study of biofertilizers for sustainable agriculture.

关键词： Biofertilizer Plant-growth-promoting bacteria Plant-growth promoting rhizobacteria Bibliometric Research hotspots

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