气候变化领域集成服务门户(CCPortal): Variation and control of soil organic carbon and other nutrients in permafrost regions on central Qinghai-Tibetan Plateau

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DOI	10.1088/1748-9326/9/11/114013
	Variation and control of soil organic carbon and other nutrients in permafrost regions on central Qinghai-Tibetan Plateau
	Liu, Wenjie; Chen, Shengyun; Zhao, Qian; Sun, Zhizhong; Ren, Jiawen; Qin, Dahe
发表日期	2014
ISSN	1748-9326
卷号	9 期号:11
英文摘要	The variation and control of soil organic carbon (SOC) and other nutrients in permafrost regions are critical for studying the carbon cycle and its potential feedbacks to climate change; however, they are poorly understood. Soil nutrients samples at depths of 0-10, 10-20, 20-30, and 30-40 cm, were sampled eight times in 2009 in alpine swamp meadow, alpine meadow and alpine steppe in permafrost regions of the central Qinghai-Tibetan Plateau. SOC and total nitrogen (TN) in the alpine swamp meadow and meadow decreased with soil depth, whereas the highest SOC content in the alpine steppe was found at depths of 20-30 cm. The vertical profiles of total and available phosphorus (P) and potassium (K) were relatively uniform for all the three grassland types. Correlation and linear regression analyses showed that soil moisture (SM) was the most important parameter for the vertical variation of SOC and other soil nutrients, and that belowground biomass (BGB) was the main source of SOC and TN. The spatial variations (including seasonal variation) of SOC and TN at plot scale were large. The relative deviation of SOC ranged from 7.18 to 41.50 in the alpine swamp meadow, from 2.88 to 35.91 in the alpine meadow, and from 9.33 to 68.38 in the alpine steppe. The spatial variations in the other soil nutrients varied among different grassland types. The most important factors for spatial variations (including seasonal variation) of SOC, TN, total P, available P, and both total and available K were: SM, SM and temperature, SM, air temperature, and SM and BGB, respectively. The large variation in the three grassland types implies that spatial variation at plot scale should be considered when estimating SOC storage and its dynamics.
英文关键词	permafrost; alpine grassland; belowground biomass; soil moisture; soil temperature
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/158582
作者单位	Chen, SY (corresponding author), Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China.
推荐引用方式 GB/T 7714	Liu, Wenjie,Chen, Shengyun,Zhao, Qian,et al. Variation and control of soil organic carbon and other nutrients in permafrost regions on central Qinghai-Tibetan Plateau[J],2014,9(11).
APA	Liu, Wenjie,Chen, Shengyun,Zhao, Qian,Sun, Zhizhong,Ren, Jiawen,&Qin, Dahe.(2014).Variation and control of soil organic carbon and other nutrients in permafrost regions on central Qinghai-Tibetan Plateau.ENVIRONMENTAL RESEARCH LETTERS,9(11).
MLA	Liu, Wenjie,et al."Variation and control of soil organic carbon and other nutrients in permafrost regions on central Qinghai-Tibetan Plateau".ENVIRONMENTAL RESEARCH LETTERS 9.11(2014).