气候变化领域集成服务门户(CCPortal): Storage, patterns, and control of soil organic carbon and nitrogen in the northeastern margin of the Qinghai-Tibetan Plateau

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DOI	10.1088/1748-9326/7/3/035401
	Storage, patterns, and control of soil organic carbon and nitrogen in the northeastern margin of the Qinghai-Tibetan Plateau
	Liu, Wenjie; Chen, Shengyun; Qin, Xiang; Baumann, Frank; Scholten, Thomas; Zhou, Zhaoye; Sun, Weijun; Zhang, Tongzuo; Ren, Jiawen; Qin, Dahe
发表日期	2012
ISSN	1748-9326
卷号	7 期号:3
英文摘要	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.
英文关键词	alpine ecosystem; global warming; soil moisture; aboveground biomass; belowground biomass; mean annual temperature and precipitation
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158626
作者单位	Chen, SY (corresponding author), 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.
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],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).