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Seasonal Patterns of Soil Respiration in Three Types of Communities along Grass-Desert Shrub Transition in Inner Mongolia, China

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Advances in Atmospheric Sciences 2009年第3期26卷 503-512页

作者：金钊齐玉春董云社 manfred domroes Institute of Geographical Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101 State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi'an 710075 Institute of Geography Mainz UniversityMainz 55099Germany

The seasonal dynamics of soil respiration in steppe （S. bungeana）, desert shrub （A. ordosica）, and shrubperennial （A. ordosica ＋C. komarovii） communities were investigated during the growth season （May to October） in 2006; their environmental driving factors were also analyzed. In the three communities, soil respiration showed similar characteristics in their growth seasons, with peak respiration values in July and August owing to suitable temperature and soil moisture conditions during this period. Meanwhile, changes in soil respiration were greatly influenced by temperatures and surface soil moistures. Soil water content at a depth of 0 to 10 cm was identified as the key environmental factor affecting the variation in soil respiration in the steppe. In contrast, in desert shrub and shrub-perennial communities, the dynamics of soil respiration was significantly influenced by air temperature. Similarly, the various responses of soil respiration to environmental factors may be attributed to the different soil textures and distribution patterns of plant roots. In desert ecosystems, precipitation results in soil respiration pulses. Soil carbon dioxide （CO2） effluxes greatly increased after rainfall rewetting in all of the ecosystems under study. However, the precipitation pulse effect differed across the ecosystem. We propose that this may be a result of a reverse effect from the soil texture.

关键词： soil respiration grass-desert shrub transition Stipa bungeana Artemisia ordosica Artemisiaordosica + Cynanchum komarovii Ordos Plateau

Comparison of CO_(2) Effluxes and Their Driving Factors Between Two Temperate Steppes in Inner Mongolia, China

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Advances in Atmospheric Sciences 2006年第5期23卷 726-736页

作者：齐玉春董云社 manfred domroes 耿元波刘立新刘杏认 Institute of Geographical Sciences and Natural Resources Research CAS Beijing 100101 Institute of Geographical Sciences and Natural Resources Research CAS Beijing 100101 Department of Geography Mainz University Mainz 55099 Germany Department of Geography Mainz University Mainz 55099 Germany Institute of Geographical Sciences and Natural Resources Research CAS Beijing 100101 Graduate University of the Chinese Academy of Sciences Beijing 100039

Soil respiration is a key component of the global terrestrial ecosystem carbon cycle. The static opaque chamber method was used to measure the CO2 effiuxes from soil of a semiarid Aneurolepidium chinense steppe and a Stipa krylovii steppe in the Xilin River Basin of Inner Mongolia, China from March 2002 to December 2004. The results indicated that the soil respiration rates of the semiarid Aneurolepidium chinense steppe and the Stipa krylovii steppe were both relatively high from mid-May to mid-September of each year and remained low during the rest of the year. The minimum value of soil respiration occurred in December or January and negative effiuxes of CO2 appeared for several days during the non-growing season of individual years at the two sampling sites. A high annual variation was found in the two steppes with the coefficients of variance （CV） being over 94%, even high to 131%. The annual sums of soil CO2 effiux of the Aneurolepidium chinense steppe varied between 356.4 gC m^-2 yr^-1 and 408.8 gC m^-2 yr^-1, while those of the Stipa krylovii steppe in the three years were in the range of 110.6 gC m^-2 yr^-1 to 148.6 g Cm^-2 yr^-1. The mean respiration rates of the Aneurolepidium chinense steppe were significantly higher than those of the Stipa krylovii steppe in different statistical periods with the exception of the non-growing season. About 59.9% and 80.6% of the soil respiration variations in both steppes for the whole sampling period were caused by the changes of temperature and soil water content. In the Aneurolepidium chinense steppe, the soil respiration rate has significant or extremely significant positive correlation （r = 0.58 - 0.85, p 〈 0.05 or p 〈 0.01） with air temperature and ground temperature of the topsoil except in 2002; the unique contributions of temperature change to the soil respiration variation of the three years were 53.3%, 81.0% and 58.6%, respectively. But, for the Stipa krylovii steppe in the same time interval, the soil water con

关键词： semiarid Aneurolepidium chinense steppe Stipa krylovii steppe soil respiration drivingfactors comparison

Emission characteristics of carbon dioxide in the semiarid Stipa grandis steppe in Inner Mongolia, China

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Journal of Environmental Sciences 2006年第3期18卷 488-494页

作者： LIU Xing-ren QI Yu-chun LIU Ji-yuan manfred domroes LIU Li-xin GENG Yuan-bo YANG Xiao-hong LI Ming-feng Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Department of Geography Mainz University 55099 Mainz Germany Graduate School of the Chinese Academy of Sciences Beijing 100039 China

Using the static opaque chamber method, the soil respiration rates （SR） were measured through the continuous experiments in situ in semiarid Stipa grandis steppe in Xilin River Basin of Inner Mongolia, China from June 2001 to June 2003, in parallel, the difference between the SR and the ecosystem respiration rates （TER） were compared. The results indicated that the seasonal variations of the SR and TER were obvious with higher emissions in growing season and a relatively low efflux level in non-growing season, furthermore, the negative effluxes were found in the observation site in winter; the annual CO2 efflux of total ecosystem ranged from 160.5 gC/（m^2·a） to 162.8 gC/（m^2·a） and that of soil ranged from 118.7 gC/（m^2·a） to 152.3 gC/（m^2·a）. The annual SR accounted for about 74.0% to 93.5% of the annual TER, but the results of Analysis of Variance （ANOVA） indicated that the difference between the annual average TER and SR did not reach the significance level of 0.05. The TER was under similar environmental controls as SR, in growing seasons of drought years, the variations of soil moisture at 0-10 cm and 10-20 cm depth could account for 79,1% 95.6% of the changes of the SR and TER, but in non-growing season, more than 75% of the variations of the SR and TER could be explained by the changes of the ground temperature of soil surface layers.

关键词： Inner Mongolia semiarid grassland Stipa grandis steppe CO2 fluxes environmental factors

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温带典型草地土壤净氮矿化作用研究

环境科学 2007年第3期28卷 633-639页

作者：刘杏认董云社齐玉春 manfred domroes 中国科学院地理科学与资源研究所 Institute of Geography Mainz UniversityMainz55099Germany

应用树脂芯方法,研究了内蒙古锡林河流域不同降水强度3种草地类型土壤净氮矿化作用.结果表明,7～10月份,羊草草原的平均净氮矿化率为0.333kg.(hm2.d)-1,贝加尔针茅草原为0.316kg.(hm2.d)-1,克氏针茅草原为0.211kg.(hm2.d)-1;在相同的培... 详细信息

应用树脂芯方法,研究了内蒙古锡林河流域不同降水强度3种草地类型土壤净氮矿化作用.结果表明,7～10月份,羊草草原的平均净氮矿化率为0.333kg.(hm2.d)-1,贝加尔针茅草原为0.316kg.(hm2.d)-1,克氏针茅草原为0.211kg.(hm2.d)-1;在相同的培养周期内,分阶段培养和连续培养对土壤的净氮矿化量和净氮矿化速率有显著影响;降雨是影响该区域氮素矿化的主要因素之一,3种草地类型土壤水分变化量与土壤净氮矿化速率呈正相关关系,相关系数分别为0.80、0.61、0.56.

关键词：温带草原树脂芯法净氮矿化

Climatological characteristics of the tropics in China:climate classification schemes between German scientists and Huang Bingwei

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Journal of Geographical Sciences 2003年第3期13卷 271-285页

作者： manfred domroes Department of Geography Mainz University

Reviewing some important German scientists who have developed climatic regionalization schemes either on a global or Chinese scale, their various definitions of the tropical climate characteristics in China are discussed and compared with Huang Bingwei's climate classification scheme and the identification of the tropical climate therein. It can be seen that, due to different methodological approaches of the climatic regionalization schemes, the definitions of the tropics vary and hence also their spatial distribution in China. However, it is found that the tropical climate type occupies only a peripheral part of southern China, though it firmly represents a distinctive type of climate that is subsequently associated with a great economic importance for China. As such, the tropical climate type was mostly identified with its agro-climatological significance, that is by giving favourable growing conditions all-year round for perennial crops with a great heat demand. Tropical climate is, hence, conventionally regarded to be governed by all-year round summer conditions 'where winter never comes'.

关键词： tropical climate climate regionalization schemes China Asia-Pacific region

Precipitation pulses and soil CO2 emission in desert shrubland of Artemisia ordosica on the Ordos Plateau of Inner Mongolia,China

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Precipitation pulses and soil CO2 emission in desert shrubla...

《香港、澳门和珠江三角洲——地理概述》书评(英文)

中国地理学会百年庆典

作者：金钊董云社齐玉春 manfred domroes State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of Sciences Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Institute of Geography Mainz University

Precipitation is the major driver of ecosystem functions and processes in semiarid and arid *** such water-limited ecosystems,pulsed water inputs directly control the belowground processes through a series of soil drying and rewetting *** investigate the effects of sporadic addition of water on soil carbon efflux,an artificial precipitation event(3 mm) was applied to a desert shrub ecosystem in the Mu Us Sand Land of the Ordos Plateau in *** respiration rapidly increased 2.8--4.1 times immediately after adding water in the field,after which it returned to background level within 48 *** the experiment,soil CO production was between 2047.0 and 7383.0 mg *** the shrubland,soil respiration responses showed spatial variations,having stronger pulse effects beneath the shrubs than in the interplant *** spatial variation of the soil respiration responsiveness was noted to be closely related with the heterogeneity of soil substrate *** from precipitation,soil organic carbon and total nitrogen pool were also identified as determinants of soil CO loss in desert ecosystems.

关键词： Artemisia ordosica Ordos Plateau Precipitation pulses Soil respiration

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亚热带资源与环境学报 2010年第2期5卷 92-93页

作者： manfred domroes Department of Geography Johannes Gutenberg University of Mainz

Koon-kwai WONG(Ed·):Hong Kong,Macao and the Pearl River Delta:A Geographical ***·386,Hong Kong(Hong Kong Educational Publishing Co.),E-mail:sales@***;***

关键词：《香港、澳门和珠江三角洲--地理概述》书刊内容介绍中国地理知识

N_2O emissions from agricultural soils in the North China Plain: the effect of chemical nitrogen fertilizer and organic manure

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Journal of Environmental Sciences 2000年第4期12卷 463-468页

作者： DONG Yun\|she 1,2,3 , Dieter Scharffe 2, manfred domroes 3, QI Yu chun 1, ZHANG Shen 1 (1. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China E\|mail: dongys@*** 2. M 中科院地理科学与资源所北京 1 0 0 1 0 Max- Planck-Institute of Chemistry 德国 Mainz 550 2 0 Mainz University 德国 Mainz 550 99

An enclosed chamber technique was used to measure N 2O emissions from intensively agricultural soils of the North China Plain during the periods of 1995—1996 and 1997—1998, to reflect distinct components of winter wheat and summer maize growing seasons. The results showed that the continuous application of fertilizer in agricultural soils increased N\-2O emissions by a factor of 24.1—28.1, the calculated annual chemical N fertilizer\|transformed N\-2O\|N emissions was 0.67%. Our results indicated that the application of organic manure also had a significant influence on soil N 2O emissions, which combined with the use of chemical N increased about 20% in a year. It was calculated that there were about 0.11% N of organic manure transformed as N 2O N. Annual mean N 2O emission from our study area of fertilized soils was estimated to be 57.1 μgN 2O/(m 2·h). A weak correlation was also found between N 2O emissions and soil available nitrogen content NH + 4.

关键词： N_2O emissions the North China Plain agricultural soils chemical nitrogen organic manure

内蒙古温带半干旱羊草草原N_2O通量及其影响因素

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地理研究 2004年第6期23卷 776-784页

作者：董云社齐玉春 manfred domroes 耿元波杨小红刘立新刘杏认中国科学院地理科学与资源研究所北京100101 Department of Geography Mainz University

利用静态箱 -气相色谱法于 2 0 0 1～ 2 0 0 3年对内蒙古锡林河流域羊草草原进行了连续 2年的野外定位试验 ,获得羊草草原原状群落与土壤N2 O年排放通量分别在 3 91～ 4 71μgm- 2h- 1以及 5 5 0～ 10 0 3μgm- 2 h- 1范围内变动 ,... 详细信息

利用静态箱 -气相色谱法于 2 0 0 1～ 2 0 0 3年对内蒙古锡林河流域羊草草原进行了连续 2年的野外定位试验 ,获得羊草草原原状群落与土壤N2 O年排放通量分别在 3 91～ 4 71μgm- 2h- 1以及 5 5 0～ 10 0 3μgm- 2 h- 1范围内变动 ,证明内蒙古温带半干旱羊草草原生态系统是大气中N2 O的源 ;系统分析了羊草草原N2 O通量的季节变化、源汇特征以及关键的环境因子对草地N2 O通量的影响等 ,建立了N2 O通量与环境因子间的回归方程 ;并利用两年连续完整的观测数据对羊草草原N2

关键词：内蒙古羊草草原 N2O 通量特征环境因子