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Soil Carbon Sequestration Potential as Affected by Management Practices in Northern China:A Simulation Study

Pedosphere 2014年第4期24卷 529-543页

作者： WANG guo-Cheng WANG En-Li huang Yao XU Jing-Jing state key laboratory of Atmospheric Boundary Layer Physics and Atmospheric chemistry(LAPC) Institute of Atmospheric PhysicsChinese Academy of Sciences CSIRO Land & Water Black MountainCanberraACT 2601(Australia) state key laboratory of Vegetation and environmental Change(LVEC) Institute of BotanyChinese Academy of Sciences

Soil has been identified as a possible carbon （C） sink for sequestering atmospheric carbon dioxide （CO2）. However, soil organic carbon （SOC） dynamics in agro-ecosystems is affected by complex interactions of various factors including climate, soil and agricultural management practices, which hinders our understanding of the underlying mechanisms. The objectives of this study were to use the Agricultural Production Systems simulator （APSIM） model to simulate the long-term SOC dynamics under different management practices at four long-term experimental sites, Zhengzhou and Xuzhou with double cropping systems and Gongzhuling and Urtimqi with single cropping systems, located in northern China. Firstly, the model was calibrated using information from the sites and literature, and its performance to predict crop growth and SOC dynamics was examined. The calibrated model was then used to assess the impacts of different management practices, including fertilizer application, irrigation, and residue retention, on C dynamics in the top 30 cm of the soil by scenario modelling. Results indicate a significant SOC sequestration potential through improved management practices of nitrogen （N） fertilizer application, stubble retention, and irrigation. Optimal N fertilization （Nopt） and 100% stubble retention （R100） increased SOC by about 11.2%, 208.29%, and 283.67% under irrigation at Gongzhuling, Zhengzhou, and Xuzhou, respectively. Soil organic carbon decreased rapidly at lJriimqi under irrigation, which was due to the enhanced decomposition by increased soil moisture. Under rainfed condition, SOC remained at a higher level. The combination of Nopt and R100 increased SOC by about 0.46% under rainfed condition at /Jr/imqi. Generally, agricultural soils with double cropping systems （Zhengzhou and Xuzhou） showed a greater potential to sequester C than those with single cropping systems （Gongzhuling and Urumqi）.

关键词： agro-ecosystems APSIM model fertilizer application irrigation residue retention scenario analysis soil organic carbon

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Contrasting Effects of Agricultural Management on Soil Organic Carbon Balance in Different Agricultural Regions of China

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Pedosphere 2013年第6期23卷 717-728页

作者： WANG guo-Cheng LUO Zhong-Kui WANG En-Li huang Yao state key laboratory of Atmospheric Boundary Layer Physics and Atmospheric chemistry Institute of Atmospheric PhysicsChinese Academy of Sciences CSIRO Land & Water Black Mountain state key laboratory of Vegetation and environmental Change Institute of BotanyChinese Academy of Sciences

Improving management of soil organic carbon(SOC)has been considered as a substantial mitigation strategy to climate *** such as stubble retention(SR),conservation tillage(ZT),and fertilization are recommended for both promoting production and accumulating ***,whether such management practices can cause net increase in SOC or just a slow-down of SOC decline largely depends on the current status of SOC for a given *** paper synthesized the available SOC data in the croplands of China,and analysed the change of SOC in the top 20 cm soil as a result of management *** results showed that,on average,SOC increased by 18.3%through SR,by 9.1%through ZT,and by 12.4%,36.9%and 41.5%through application of inorganic(IF),organic(OF)and combined inorganic and organic fertilizers(IOF),respectively,compared to those under stubble removal,conventional tillage and no *** SR,ZT,IF,OF and IOF,SOC increased by 16.0%,10.2%,8.2%,32.2%and41.3%,respectively,at the end of the trials compared with the initial values at the start of the *** analysis also showed that in Northeast and Northwest China,SOC in agricultural soils is still decreasing due to *** North and South China,however,SOC appears to have reached a new equilibrium of low SOC state after a long cultivation history,and soils have greater potential to sequester *** analysis highlights the need of taking account of the baseline status to assess the net soil C balance over time and space.

关键词： agricultural practices climate change fertilization residue management tillage

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Concentration and source identification of polycyclic aromatic hydrocarbons and phthalic acid esters in the surface water of the Yangtze River Delta,China

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Journal of environmental Sciences 2012年第2期24卷 335-342页

作者： Lifei Zhang liang Dong Lijun Ren Shuangxin Shi Li Zhou Ting Zhang Yeru huang state environmental Protection key laboratory of Dioxin Pollution Control National Research Center for Environmental Analysis and Measurement Beijing 100029 China

The pollution from polycyclic aromatic hydrocarbons（PAHs） and phthalic acid esters（PAEs） in the surface water of the rapidly urbanized Yangtze River Delta region was *** surface water samples were collected in June *** samples were liquid-liquid extracted using methylene chloride and analyzed by gas chromatography-mass *** of PAHs and PAEs ranged 12.9-638.1 ng/L and 61-28550 ng/L,***,naphthalene,pyrene,phenanthrene,di-2ethylhexyl phthalate,and di-n-butyl phthalate were the most abundant compounds in the *** water samples were moderately polluted with benzo[a]pyrene according to China＇s environmental quality standard for surface *** two highest concentrations of PAHs and PAEs occurred in samples from Taihu Lake,Wuxi City and the western section of Yangchenghu *** sources of pollution at S7 were petroleum combustion and the plastics industry,and at Yangchenghu Lake were petroleum combustion and domestic *** in samples from the Beijing-Hangzhou Grand Canal originated from diesel *** were no obvious sources of pollution for the other water *** results can be used as reference levels for future monitoring programs of pollution from PAHs and PAEs.

关键词： polycyclic aromatic hydrocarbons phthalic acid esters Yangtze River Delta surface water

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INVESTIGATION ON THE BINDING INTERACTION BETWEEN LONG-CHAIN ORGANIC CHEMICALS AND HUMAN SERUM ALBUMIN

INVESTIGATION ON THE BINDING INTERACTION BETWEEN LONG-CHAIN ...

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第十二届北京分析测试学术报告会暨展览会(BCEIA 2007)

作者： Yanmin CHEN liang-hong guo state key laboratory of environmental chemistry and ecotoxicology Research Center for Eco-environmental Sciences Chinese Academy of Sciences

Perfluorooctane sulfonates(PFOS)are a class of organic compounds that are toxic,persistent in the environment,and able to transport over the long *** to their structural similarity to long-chain fatty acids,PFOS are suspected to bind to human serum albumin(HSA)in the *** confirmed,the binding interaction would have a strong implication on their toxicity in vivo.

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CdSe QD-induced morphological and functional impairments to liver in mice

CdSe QD-induced morphological and functional impairments to ...

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第六届全国环境化学大会暨环境科学仪器与分析仪器展览会

作者： Wei Liu~(1,2),Shuping Zhang~1,Lixin Wang~1,Chen Qu~1,Changwen Zhang~1, Lei hong~1,Lin Yuan~1,Zehao huang~1,Sijin Liu~(1*),Guibin Jiang~1, (1state key laboratory of environmental chemistry and ecotoxicology,Chinese Academy of Sciences,Beijing 100085,China 2Department of Microbiology,Abramson,Comprehensive Cancer Center,University of Pennsylvania Medical School,Philadelphia,Pennsylvania,USA.)

＜正＞Quantum dots（QDs）,as unique nanoparticle probes,have been used in in vivo fluorescence imaging such as *** to the novel characteristics in fluorescence,QDs represent a family of promising substances to be used in experimental and clinical *** far,the toxicity and adverse health effects from exposure（including environmental exposure） to QDs are not recognized,but are publicly concerned. To assess the biological effects of QDs, we established a mouse model of in vivo exposure to *** from the present study demonstrated that QD particles could readily spread into

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Phytoplankton communities and its controlling factors in summer and autumn in the southern Yellow Sea, China

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Acta Oceanologica Sinica 2015年第2期34卷 114-123页

作者： LIU Haijiao huang Yajie ZHAI Weidong guo Shujin JIN Hualong SUN Jun College of Marine Science and Engineering Tianjin University of Science and Technology key laboratory for Ecological Environment in Coastal Areas of state Oceanic Administration National Marine Environmental Monitoring Center Tianjin key laboratory of Marine Resources and chemistry Tianjin University of Science and Technology

The phytoplankton water samples were collected in two multidisciplinary investigations which were carried out during summer（June） and autumn（November to December） of 2011. Phytoplankton species composition and abundance data were accomplished by Uterm？hl method. The phytoplankton community was dominated by diatoms and dinoflagellates in the southern Yellow Sea（YS） in summer and autumn. In summer, Paralia sulcata and Prorocentrum dentatum were the predominated species, the cell abundance ranged from 0.074 to 107.733×103 cells/L with an average of 9.057×103 cells/L. Two phytoplankton high abundance appeared in northwest part of the survey area and the Changjiang River Estuary, respectively. In autumn, Par. sulcata became the predominant species, and the phytoplankton cell abundance ranged from 1.035×103 to 8.985×103 cells/L, the average was 3.263×103 cells/L. The phytoplankton abundance in surface layer presented the homogeneous distributions. Canonical Correspondence Analysis（CCA） method was applied for discovering the relationship between environmental factors and the common found phytoplankton species. The responses of phytoplankton to nutrients were varied between summer and autumn. The abundance of most predominant species, Par. sulcata was strongly correlated to temperature and salinity in autumn, but not the case in summer.

关键词： phytoplankton southern Yellow Sea YSCW nutrients CCA correlation

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Hydroxyl radical formation upon dark oxidation of reduced iron minerals: Effects of iron species and environmental factors

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Chinese Chemical Letters 2019年第12期30卷 2241-2244页

作者： Ailing Zhu Yingying guo Guangliang Liu Maoyong Song Yong liang Yong Cai Yongguang Yin Institute of Environment and Health Jianghan UniversityWuhan 430056China state key laboratory of environmental chemistry and ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China laboratory of environmental Nanotechnology and Health Effect Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Department of chemistry and Biochemistry Florida International UniversityMiamiFL 33199United States

Dark formation of hydroxyl radical upon oxidation of reduced iron minerals plays an important role in the degradation and transformation of organic and inorganic ***,we compared the hydroxyl radical formation from various reduced iron minerals at different redox conditions.·OH production was generally observed from the oxidation of reduced iron minerals,following the order:mackinawite(FeS)>reduced nontronite(iron-bearing smectite clay)> pyrite(FeS2)> side rite(FeCO3).Structural Fe^2+ and dissolved O2 play critical roles in ·OH production from reduced iron minerals.·OH production increases with decreasing pH,and Cl^-has little effect on this *** importantly,dissolved organic matter significantly enhances ·OH production,especially under O2 purging,highlighting the importance of this process in ambient *** sunlight-independent pathway in which ’OH forms during oxidation of reduced iron minerals is helpful for understanding the degradation and transformation of various inorganic and organic pollutants in the redox-fluctuation environments.

关键词： Reduced iron minerals Hydroxyl radical Dark oxidation Mackinawite Dissolved organic matter

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Flexible feeding patterns of copepod Centropages tenuiremis in fluctuating conditions: a possible survival strategy to cope with disturbance

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Acta Oceanologica Sinica 2020年第2期39卷 59-68页

作者： Cuilian Xu Simin Hu Zhiling guo Tao Li Hui huang Leo Lai Chan Sheng Liu key laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Provincial key laboratory of Applied Marine Biology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China University of Chinese Academy of Sciences Beijing 100049China state key laboratory of environmental chemistry and ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Tropical Marine Biological Research Station in Hainan Chinese Academy of SciencesSanya 572000China Shenzhen key laboratory for the Sustainable Use of Marine Biodiversity Research Centre for the Oceans and Human HealthCity University of Hong Kong Shenzhen Research InstituteShenzhen 518057China state key laboratory in Marine Pollution City University of Hong KongHong Kong 999077China

Centropages tenuiremis is a species with a wide distribution range in disturbed coastal ***,due to a lack of dietary information,it remains unclear as to how they maintain such dominance in fluctuating *** this study,*** was collected from the Daya Bay Nuclear Power Plant both in inlet and outfall regions at 06:00,12:00 and 18:00 on April 27,2011 and their in situ diet was analyzed using a PCR protocol targeting 18S ribosomal ***-four species of prey organisms were identified totally,including Dinophyta,Baciliariophyta,Viridiplantae,Rhizaria,Apicomplexa,Chordata,Mollusca,Arthropoda and Fungi,indicating an obvious omnivorous feeding habit of *** tenuiremis obviously exhibited spatial and temporal variations in diet *** plant prey(land plants and phytoplankton)were consumed in the morning(~50%),while more animal prey(metazoans and protozoans)were ingested at midday and night(60%–70%).Furthermore,a more diverse diet was detected in the outfall region(10–11 taxa),where the temperatures were relatively higher and more fluctuating,than in the control region(5–10 taxa).This finding indicated that *** could potentially expand its food spectrum under stressful ***,*** exhibited phytoplankton preference(58.62%–67.64%)in the outfall region with a lower omnivory index(0.27–0.35)than in the control region(0.51–0.95).However,phytoplankton density was lower than that in the control region,suggesting a possible herbivorous tendency of *** under elevated temperatures to balance the energy acquirement and feeding *** flexible food choices of *** observed here could effectively buffer environmental fluctuations and might be an important survival strategy in coastal ecosystems.

关键词： Centropages feeding response feeding strategy coastal ecosystem Daya Bay

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Graphene Quantum Dot‑Mediated Atom‑Layer Semiconductor Electrocatalyst for Hydrogen Evolution

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纳微快报:英文版 2023年第12期15卷 21-35页

作者： Bingjie Hu Kai huang Bijun Tang Zhendong Lei Zeming Wang Huazhang guo Cheng Lian Zheng Liu liang Wang Institute of Nanochemistry and Nanobiology School of Environmental and Chemical EngineeringShanghai University99 Shangda RoadBaoShan DistrictShanghai 200444People’s Republic of China state key laboratory of Chemical Engineering Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237People’s Republic of China School of Materials Science and Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore

The hydrogen evolution reaction performance of semiconducting 2H-phase molybdenum disulfide(2H-MoS_(2))presents a significant hurdle in realizing its full potential ***,we utilize theoretical calculations to predict possible functionalized graphene quantum dots(GQDs),which can enhance HER activity of bulk MoS_(2).Subsequently,we design a functionalized GQD-induced in-situ bottom-up strategy to fabricate near atom-layer 2H-MoS_(2) nanosheets mediated with GQDs(ALQD)by modulating the concentration of electron withdrawing/donating functional *** results reveal that the introduction of a series of functionalized GQDs during the synthesis of ALQD plays a crucial ***,the higher the concentration and strength of electron-withdrawing functional groups on GQDs,the thinner and more active the resulting ALQD ***,the synthesized near atom-layer ALQD-SO_(3)demonstrate significantly improved HER *** GQD-induced strategy provides a simple and efficient approach for expanding the catalytic application of MoS_(2).Furthermore,it holds substantial potential for developing nanosheets in other transition-metal dichalcogenide materials.

关键词： Graphene quantum dots MoS2 nanosheets Atom-layer Semiconductor electrocatalysts Hydrogen evolution reaction

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In situ TEM visualization of Ag catalysis in Li-O_(2)nanobatteries

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Nano Research 2023年第5期16卷 6833-6839页

作者： Yixuan Wen Shuaijun Ding Chongchong Ma Peng Jia Wei Tu Yunna guo Shuang guo Wei Zhou Xiaoqian Zhang Jianyu huang Liqiang Zhang Tongde Shen Yuqing Qiao Hebei key laboratory of Applied chemistry College of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China

Lithium-oxygen(Li-O_(2))batteries have been considered as an ideal solution to solving the global energy ***(Ag)and Agbased catalyst have been extensively studied due to their high catalytic activities in Li-O_(2)***,it remains a challenge to track the catalytic mechanism during the charge/discharge ***,a nanoscale processing method was used to assemble a Li-O_(2)nanobattery in an aberration-corrected environmental transmission electron microscope(ETEM),where a single Ag nanowire(NW)was used as catalyst for O_(2)electrode.A visualization of the lithium ion insertion process during the electrochemical reactions was achieved in this *** Ag nanoparticles(NPs)were observed on the surface of the Ag NW,which were covered by the discharge product Li2O_(2).By simultaneously studying the evolution of the interface and the phase transformation,it can be concluded that these Ag NPs wrapped around Ag NW acted as catalyst during the subsequent charge/discharge *** on these studies,Ag NPs decorated on porous carbon were synthesized,it can simultaneously improve the cycling stability(100 cycles)and the maximum specific capacity(17,371 mAh·g^(−1)at a current density of 100 mA·g^(−1))in a coin cell Li-O_(2)*** study suggests that nanoscale Ag may be a promising catalyst for Li-O_(2)battery.

关键词： Li-O_(2)battery in situ environmental transmission electron microscopy catalyst Ag nanoparticles

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