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Storage, patterns, and control of soil organic carbon and nitrogen in the northeastern margin of the Qinghai-Tibetan Plateau
Liu, Wenjie1; Chen, Shengyun1; Qin, Xiang1; Baumann, Frank2; Scholten, Thomas2; Zhou, Zhaoye1; Sun, Weijun1; Zhang, Tongzuo3; Ren, Jiawen1; Qin, Dahe1
2012-07-01
发表期刊ENVIRONMENTAL RESEARCH LETTERS
ISSN1748-9326
卷号7期号:3
文章类型Article
摘要This study tested the hypothesis that soil organic carbon (SOC) and total nitrogen (TN) spatial distributions show clear relationships with soil properties and vegetation composition as well as climatic conditions. Further, this study aimed to find the corresponding controlling parameters of SOC and TN storage in high-altitude ecosystems. The study was based on soil, vegetation and climate data from 42 soil pits taken from 14 plots. The plots were investigated during the summers of 2009 and 2010 at the northeastern margin of the Qinghai-Tibetan Plateau. Relationships of SOC density with soil moisture, soil texture, biomass and climatic variables were analyzed. Further, storage and vertical patterns of SOC and TN of seven representative vegetation types were estimated. The results show that significant relationships of SOC density with belowground biomass (BGB) and soil moisture (SM) can be observed. BGB and SM may be the dominant factors influencing SOC density in the topsoil of the study area. The average densities of SOC and TN at a depth of 1 m were about 7.72 kg C m(2) and 0.93 kg N m 2. Both SOC and TN densities were concentrated in the topsoil (0-20 cm) and fell exponentially as soil depth increased. Additionally, the four typical vegetation types located in the northwest of the study area were selected to examine the relationship between SOC and environmental factors (temperature and precipitation). The results indicate that SOC density has a negative relationship with temperature and a positive relationship with precipitation diminishing with soil depth. It was concluded that SOC was concentrated in the topsoil, and that SOC density correlates well with BGB. SOC was predominantly influenced by SM, and to a much lower extent by temperature and precipitation. This study provided a new insight in understanding the control of SOC and TN density in the northeastern margin of the Qinghai-Tibetan Plateau.; This study tested the hypothesis that soil organic carbon (SOC) and total nitrogen (TN) spatial distributions show clear relationships with soil properties and vegetation composition as well as climatic conditions. Further, this study aimed to find the corresponding controlling parameters of SOC and TN storage in high-altitude ecosystems. The study was based on soil, vegetation and climate data from 42 soil pits taken from 14 plots. The plots were investigated during the summers of 2009 and 2010 at the northeastern margin of the Qinghai-Tibetan Plateau. Relationships of SOC density with soil moisture, soil texture, biomass and climatic variables were analyzed. Further, storage and vertical patterns of SOC and TN of seven representative vegetation types were estimated. The results show that significant relationships of SOC density with belowground biomass (BGB) and soil moisture (SM) can be observed. BGB and SM may be the dominant factors influencing SOC density in the topsoil of the study area. The average densities of SOC and TN at a depth of 1 m were about 7.72 kg C m(2) and 0.93 kg N m 2. Both SOC and TN densities were concentrated in the topsoil (0-20 cm) and fell exponentially as soil depth increased. Additionally, the four typical vegetation types located in the northwest of the study area were selected to examine the relationship between SOC and environmental factors (temperature and precipitation). The results indicate that SOC density has a negative relationship with temperature and a positive relationship with precipitation diminishing with soil depth. It was concluded that SOC was concentrated in the topsoil, and that SOC density correlates well with BGB. SOC was predominantly influenced by SM, and to a much lower extent by temperature and precipitation. This study provided a new insight in understanding the control of SOC and TN density in the northeastern margin of the Qinghai-Tibetan Plateau.
关键词Alpine Ecosystem Global Warming Soil Moisture Aboveground Biomass Belowground Biomass Mean Annual Temperature And Precipitation
WOS标题词Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
关键词[WOS]CLIMATE-CHANGE ; GLOBAL PATTERNS ; PERMAFROST ; CHINA ; TEMPERATURE ; BIOGEOCHEMISTRY ; DECOMPOSITION ; RESPIRATION ; GRASSLANDS ; VEGETATION
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号WOS:000309555300041
引用统计
文献类型期刊论文
条目标识符http://210.75.249.4/handle/363003/3644
专题中国科学院西北高原生物研究所
作者单位1.Chinese Acad Sci, Qilian Shan Stn Glaciol & Ecol Environm, Key Lab Cryospher Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
2.Univ Tubingen, Inst Geog, Chair Phys Geog & Soil Sci, D-72070 Tubingen, Germany
3.Chinese Acad Sci, NW Inst Plateau Biol, Xining 810001, Peoples R China
推荐引用方式
GB/T 7714
Liu, Wenjie,Chen, Shengyun,Qin, Xiang,et al. Storage, patterns, and control of soil organic carbon and nitrogen in the northeastern margin of the Qinghai-Tibetan Plateau[J]. ENVIRONMENTAL RESEARCH LETTERS,2012,7(3).
APA Liu, Wenjie.,Chen, Shengyun.,Qin, Xiang.,Baumann, Frank.,Scholten, Thomas.,...&Qin, Dahe.(2012).Storage, patterns, and control of soil organic carbon and nitrogen in the northeastern margin of the Qinghai-Tibetan Plateau.ENVIRONMENTAL RESEARCH LETTERS,7(3).
MLA Liu, Wenjie,et al."Storage, patterns, and control of soil organic carbon and nitrogen in the northeastern margin of the Qinghai-Tibetan Plateau".ENVIRONMENTAL RESEARCH LETTERS 7.3(2012).
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