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Dynamics of soil inorganic nitrogen and their responses to nitrogen additions in three subtropical forests, south China

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Journal of Environmental Sciences 2006年第4期18卷 752-759页

作者： FANG Yun-ting ZHU Wei-xing MO Jiang-ming ZHOU Guo-yi GUNDERSEN Per Dinghushan forest Ecosystem Research Station South China Botanical Garden Chinese Academy of Sciences Zhaoqing 526070 China Biological Sciences Binghamton University-SUNY Binghamton NY 13902-6000 USA forest and landscape denmark Hoersholm Kongevej 11 2970 Denmark The Graduate School of the Chinese Academy of Sciences Beijing 100039 China

Three forests with different historical land-use, forest age, and species assemblages in subtropical China were selected to evaluate current soil N status and investigate the responses of soil inorganic N dynamics to monthly ammonium nitrate additions. Results showed that the mature monsoon evergreen broadleaved forest that has been protected for more than 400 years exhibited an advanced soil N status than the pine （Pinus massoniana） and pine-broadleaf mixed forests, both originated from the 1930＇s clear-cut and pine plantation. Mature forests had greater extractable inorganic N pool, lower N retention capacity, higher inorganic N leaching, and higher soil C/N ratios. Mineral soil extractable NH4^＋-N and NO3-N concentrations were significantly increased by experimental N additions on several sampling dates, but repeated ANOVA showed that the effect was not significant over the whole year except NH4^＋-N in the mature forest. In contrast, inorganic N （both NH4^＋-N and NO3^--N） in soil 20-cm below the surface was significantly elevated by the N additions. From 42% to 74% of N added was retained by the upper 20 cm soils in the pine and mixed forests, while 0%-70% was retained in the mature forest. Our results suggest that land-use history, forest age and species composition were likely to be some of the important factors that determine differing forest N retention responses to elevated N deposition in the study region.

关键词： N deposition N saturation extractable inorganic N soil solution inorganic N subtropical China

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Response of Nitrogen Leaching to Nitrogen Deposition in Disturbed and Mature forests of Southern China

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Pedosphere 2009年第1期19卷 111-120页

作者： FANG Yun-Ting M. YOH MO Jiang-Ming P. GUNDERSEN ZHOU Guo-Yi Dinghushan forest Ecosystem Research Station South China Botanical Garden the Chinese Academy of Sciences Zhaoqing Guangdong 520670 （China） Tokyo University of Agriculture and Technology Tokyo 183-8509 （Japan） forest ＆ landscape denmark Faculty of Life Sciences University of Copenhagen Hoersholm Kongevej 112970 （Denmark）

Current nitrogen (N) leaching losses and their responses to monthly N additions were investigated under a disturbed pine (Pinus massoniana) forest and a mature monsoon broadleaf forest in southern China. N leaching losses from both disturbed and mature forests were quite high (14.6 and 29.2 kg N ha-1 year-1, respectively), accounting for 57% and 80% of their corresponding atmospheric N inputs. N leaching losses were substantially increased following the first 1.5 years of N applications in both forests. The average increases induced by the addition of 50 and 100 kg N ha-1 year-1 were 36.5 and 24.9 kg N ha-1 year-1, respectively, in the mature forest, accounting for 73.0% and 24.9% of the annual amount of N added, and 14.2 and 16.8 kg N ha-1 year-1 in the disturbed forest, accounting for 28.4% and 16.8% of the added N. Great N leaching and a fast N leaching response to N additions in the mature forest might result from long-term N accumulation and high ambient N deposition load (greater than 30 kg N ha-1 year-1 over the past 15 years), whereas in the disturbed forest, it might result from the human disturbance and high ambient N deposition load. These results suggest that both disturbed and mature forests in the study region may be sensitive to increasing N deposition.

关键词： atmospheric N deposition N addition N leaching loss N saturation subtropical forests

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Wind farms increase land surface temperature and reduce vegetation productivity in the Inner Mongolia

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Geography and Sustainability 2024年第3期5卷 319-328页

作者： Luyao Liu Pengtao Liu Jiawei Yu Gang Feng Qing Zhang Jens-Christian Svenning Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau School of Ecology and EnvironmentInner Mongolia UniversityHohhot 010021China Key Laboratory of forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China Inner Mongolia Autonomous Region Ecological and Agricultural Meteorological Centre Hohhot 010051China e Collaborative Innovation Center for Grassland Ecological Security(Jointly Supported by the Ministry of Education of China and Inner Mongolia Autonomous Region) Hohhot 010021China Center for Ecological Dynamics in a Novel Biosphere(ECONOVO) Department of BiologyAarhus UniversityNy Munkegade 114Aarhus C DK-8000Denmark Center for Biodiversity Dynamics in a Changing World(BIOCHANGE) Department of BiologyAarhus UniversityNy Munkegade 114Aarhus C DK-8000Denmark

Wind power has been developing rapidly as a key measure to mitigate human-driven global *** under-standing of the development and impacts of wind farms on local climate and vegetation is of great importance for their rational use but is still *** this study,we combined remote sensing and on-site investigations to identify wind farm locations in Inner Mongolia and performed landscape pattern analyses using *** explored the impacts of wind farms on land surface temperature(LST)and vegetation net primary productivity(NPP)between 1990 and 2020 by contrasting these metrics in wind farms with those in non-wind farm *** results showed that the area of wind farms increased rapidly from 1.2 km2 in 1990 to 10,755 km2 in ***,wind farms are mainly clustered in three aggregation areas in the ***,wind farms increased nighttime LST,with a mean value of 0.23℃,but had minor impacts on the daytime ***,wind farms caused a decline in NPP,especially over forest areas,with an average reduction of 12.37 GC/m^(2).Given the impact of wind farms on LST and NPP,we suggest that the development of wind farms should fully consider their direct and potential *** study provides scientific guidance on the spatial pattern of future wind farms.

关键词： Wind farm landscape pattern LST NPP Inner Mongolia

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Sap flow for beech(Fagus sylvatica L.)in a natural and a managed forest—effect of spatial heterogeneity

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Journal of Plant Ecology 2011年第1期4卷 23-35页

作者： Lise Dalsgaard Teis Nørgaard Mikkelsen Annemarie Bastrup-Birk forest and landscape Faculty of Life SciencesUniversity of CopenhagenRolighedsvej 231958 Frederiksberg CDenmark RisøNational Laboratory for Sustainable Energy Technical University of DenmarkFrederiksborgvej 399P.O.Box 494000 RoskildeDenmark

Aims Beech(Fagus sylvatica L.)is an important species in natural and managed forests in *** drought-sensitive species dominates even-aged stands as well more natural stands composed of a mixture of tree species,age and size *** study evaluates the extent that heterogeneity in spacing and tree diameter affect the seasonal availability and use of *** Two stands were evaluated:(i)a heterogeneous forest remnant(NAT)with trees up to;300 years old,a mean top height of 28.4 m and a total of 733 stems ha1with stem diameters averaging 18 cm and(ii)an even-aged 80-year old stand(MAN),with a height of 25 m,and a total of 283 stems ha1 with diameters averaging 38 *** sap flow,Js(g m2 s1),was continuously measured in 12(MAN)and 13(NAT)trees using 20-mm long heat dissipation *** tree measures of sap flow were correlated using non-linear statistical methods with air vapour pressure deficit(D,hPa)and global radiation(Rg,J m2 day1),along with constraints imposed by reductions in soil water content(SWC).SWC was measured as volumetric%using time domain *** Findings The daily integrated Js(Js-sum)for trees growing in the evenly spaced MAN stand and trees in canopy and closed forest positions in NAT stand decreased as the availability of soil moisture was *** the heterogeneous NAT stand,SWC in a recently formed canopy gap remained high throughout the vegetation *** on regression models,the predicted relative decrease in Js-sum for dry relative to moist soil water conditions in the closed forest(at mean daily D=10 hPa)was 7–11%for trees near the gap and 39–42%for trees in the closed *** MAN,the reduction in Js-sum was 29%in dry relative to moist ***-sum in the outer 20 mm of the xylem in NAT was lower than that in MAN and the rate of decline in Js with xylem depth was less in NAT than in *** MAN,Js-sum in deep and outer xylem was negatively affected at low soil moisture availability

关键词： canopy gap canopy structure tree size tree water use

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Response of soil fauna to simulated nitrogen deposition: A nursery experiment in subtropical China

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Journal of Environmental Sciences 2007年第5期19卷 603-609页

作者： XU Guo-liang MO Jiang-ming FU Sheng-lei PER Gundersen ZHOU Guo-yi XUE Jing-Hua Institute of Ecology South China Botanical Garden Chinese Academy of Sciences Guangzhou 510650 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China Danish Center for forest Landscape and Planning KVL Hoersholm Kongevej 11 DK-2970 Hoersholm Denmark

We studied the responses of soil fauna to a simulated nitrogen deposition in nursery experimental plots in Subtropical China. Dissolved NH4NO3 was applied to the soil by spraying twice per month for 16 months, starting January 2003 with treatments of 0, 5, 10, 15 and 30 gN/（m^2·a）. Soil fauna was sampled after 6, 9, 13 and 16 months of treatment in three soil depths （0-5 cm, 5-10 cm, 10-15 cm）. Soil available N increased in correspondence with the increasing N treatment, whereas soil pH decreased. Bacterial and fungal densities were elevated by the N treatment. Soil fauna increased in the lower nitrogen treatments but decreased in the higher N treatments, which might indicate that there was a threshold around 10 gN/（m^2·a） for the stimulating effects of N addition. The N effects were dependent on the soil depth and sampling time. The data also suggested that the effects of the different N treatments were related to the level of N saturation, especially the concentration of NO3^- in the soil.

关键词： soil fauna N deposition response Subtropical China

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A Case Study Report for Urban forestry Policy Project Co-funded by EC:Analysis of Urban forestry Policy in Hangzhou,China

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Chinese forestry Science and Technology 2008年第1期7卷 13-19页

作者： Stephan Pauleit Danish Centre for forest Landscape and Planning University of Copenhagen DK 1958 Frederiksberg Denmark

Hangzhou is a typical city on the establishment of urban forest in China, so it was identified as a case study site in Urban forestry Policy Project Co-funded by EC. The name of the project is "Developing Policy Formulation and Implementation Tools for Providing Support for Ecological forest Management in China’s Urban and Peri-Urban Areas". Experts from the project team have conducted a field survey on urban forestry policy in Hangzhou for one week. Through the field survey and the workshop, the experts understand the current development of urban forestry, the management institutions, the policy framework, the policy- making and the implementation procedure in Hangzhou. The impacts of urban policy and experiences of urban forest planning and management were analyzed. Finally, the main existing problems of urban forestry development were concluded and related policy recommendations in Hangzhou were provided.

关键词： Hangzhou urban forestry administrative agency policy formulation implementation impacts measures

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Urban forestry as a Vehicle for Healthy and Sustainable Development

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Chinese forestry Science and Technology 2005年第1期4卷 1-14页

作者： NILSSON Kjell Danish Centre for forest Landscape and Planning Rolighedsvej 23 DK-1958 Frederiksberg C Denmark

Urban forestry has been defined as the art, science and technology of managing trees and forestresources in and around urban community ecosystems for the physiological, sociological, economic andaesthetic benefits trees provide. The importance of urban forestry has received limited attention in manypoor countries as it is often percieved as being associated with beautification projects, which are considereda luxury benefiting only the wealthier part of the population. However, urban forestry may have a number ofenvironmental, economic and socio-cultural values, which will also benefit poorer segments of city *** in poorer countries, planning for urban trees and forests is a good investment, as these areas will bedemanded when income levels increase. Once everything is allocated to other construction or infrastructure,it may be very difficult to create new green areas unless these are planned *** Danish Centre for forest, landscape and Planning has been leading actor in the development of Urbanforestry during the last decade. EUFORIC (European Urban forestry Research and Information Centre),COST Action E12 Urban forests and Trees and E39 forests, Trees and Human Health and Wellbeing areall examples of activities initiated and coordinated by the Danish centre. It has also developed urban forestryand urban greening as a concept for environment and development aid projects in Eastern Europe anddeveloping countries in Southeast Asia and Southern Africa. Over the coming years, the main challange willbe to ensure that the expansion of the green infrastructure in the worlds urban areas is implemented withinthe framework of sustainability and human health and well-being, without the use of a technology inimical toman and nature and with as few chemical aids as possible.

关键词： urban forestry urban greening green structure planning urban environment social indicators human health public participation development aid St Petersburg Malaysia Johannesburg

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A review of data-driven whole-life state of health prediction for lithium-ion batteries:Data preprocessing,aging characteristics,algorithms,and future challenges

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Journal of Energy Chemistry 2024年第10期97卷 630-649,I0013页

作者： Yanxin Xie Shunli Wang Gexiang Zhang Paul Takyi-Aninakwa Carlos Fernandez Frede Blaabjerg School of Information Engineering Southwest University of Science and TechnologyMianyang 621010SichuanChina College of Electric Power Inner Mongolia University of TechnologyHohhot 010080Inner MongoliaChina School of Pharmacy and Life Sciences Robert Gordon UniversityAberdeen AB10-7GJUK Department of Energy Technology Aalborg UniversityPontoppidanstraede 1119220 Aalborg EastDenmark

Lithium-ion batteries are the preferred green energy storage method and are equipped with intelligent battery management systems(BMSs)that efficiently manage the *** not only ensures the safety performance of the batteries but also significantly improves their efficiency and reduces their damage *** their whole life cycle,lithium-ion batteries undergo aging and performance degradation due to diverse external environments and irregular degradation of internal *** degradation is reflected in the state of health(SOH)***,this review offers the first comprehensive analysis of battery SOH estimation strategies across the entire lifecycle over the past five years,highlighting common research focuses rooted in data-driven *** delves into various dimensions such as dataset integration and preprocessing,health feature parameter extraction,and the construction of SOH estimation *** approaches unearth hidden insights within data,addressing the inherent tension between computational complexity and estimation *** enha nce support for in-vehicle implementation,cloud computing,and the echelon technologies of battery recycling,remanufacturing,and reuse,as well as to offer insights into these technologies,a segmented management approach will be introduced in the *** will encompass source domain data processing,multi-feature factor reconfiguration,hybrid drive modeling,parameter correction mechanisms,and fulltime health *** on the best SOH estimation outcomes,health strategies tailored to different stages can be devised in the future,leading to the establishment of a comprehensive SOH assessment *** will mitigate cross-domain distribution disparities and facilitate adaptation to a broader array of dynamic operation *** article reviews the current research landscape from four perspectives and discusses the challenges that lie *** and practitioners can gain

关键词： Lithium-ion batteries Whole life cycle Aging mechanism Data-driven approach State of health Battery management system

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Higher Education on Urban forestry in Europe: An Overview

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Chinese forestry Science and Technology 2003年第3期2卷 16-27页

作者： ANDERSEN FRODE KONIJNENDIJK CECIL C RANDRUP THOMAS B Skov SkovSkov & LandskabDanish Forest and Landscape Research Institute Hφrsholm Kongevej 11DK-2970 HφrsholmDenmark& LandskabDanish Forest and Landscape Research Institute Hφrsholm Kongevej 11DK-2970 HφrsholmDenmark Corresponding author& LandskabDanish Forest and Landscape Research Institute Hφrsholm Kongevej 11.DK-2970 Hφrsholm. Denmark

In order to meet the demands of modern, information-based society, higher education in natural resource management needs to be transformed. Enhanced mobility of students and staff, multi- and transdisciplinary approaches, as well as innovative educational approaches are called for. Moreover, the urban component needs to be better incorporated, as exemplified by the emerging field of urban forestry. This paper relates to the developments in higher education within the context of education on urban forest...

关键词： higher education urban forestry Europe

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Effect of Simulated N Deposition on Soil Exchangeable Cations in Three forest Types of Subtropical China

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Pedosphere 2009年第2期19卷 189-198页

作者： LU Xian-Kai MO Jiang-Ming P.GUNDERSERN ZHU Wei-Xing ZHOU Guo-Yi LI De-Jun ZHANGXu Dinghushan forest Ecosystem Research Station South China Botanical Garden Chinese Academy of Sciences Zhaoqing 526070 China Danish Centre for forest Landscape and Planning University of Copenhagen Hoersholm Kongevej 11 DK-2970 Hoersholm Denmark Department of Biological Sciences State University of New York Binghamton NY 13902-6000 （USA） Nanjing Agricultural University Nanjing 210095 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China

The effects of simulated nitrogen(N)deposition on soil exchangeable cations were studied in three forest types of subtropical *** N treatments with three replications were designed for the monsoon evergreen broadleaf forest (mature forest):control(0 kg N ha-1 year-1),low N(50 kg N ha-1 year-1),medium N(100 kg N ha-1 year-1)and high N(150 kg N ha-1 year-1),and only three treatments(i.e.,control,low N,medium N)were established for the pine and mixed *** had been applied continuously for 26 months before the *** mature forest responded more rapidly and intensively to N additions than the pine and mixed forests,and exhibited some significant negative symptoms,e.g.,soil acidification,Al mobilization and leaching of base cations from *** pine and mixed forests responded slowly to N additions and exhibited no significant response of soil *** of soil exchangeable cations to N deposition varied in the forests of subtropical China,depending on soil N status and land-use history.

关键词： exchangeable cation forest soil land-use history N deposition subtropics

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