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	Vertical patterns and controls of soil nutrients in alpine grassland: Implications for nutrient uptake
	Tian, Liming1,2,3; Zhao, Lin1,2; Wu, Xiaodong1; Fang, Hongbing1; Zhao, Yonghua1; Yue, Guangyang1; Liu, Guimin4; Chen, Hao5
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2017-12-31
卷号	607页码:855-864
关键词	Nutrient cycling Permafrost Alpine grassland Soil nutrient Qinghai-Tibet plateau
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2017.07.080
通讯作者	Zhao, Lin(linzhao@lzb.ac.cn)
英文摘要	Vertical patterns and determinants of soil nutrients are critical to understand nutrient cycling in high-altitude ecosystems; however, they remain poorly understood in the alpine grassland due to lack of systematic field observations. In this study, we examined vertical distributions of soil nutrients and their influencing factors within the upper 1 m of soil, using data of 68 soil profiles surveyed in the alpine grassland of the eastern Qinghai-Tibet Plateau. Soil organic carbon (SOC) and total nitrogen (TN) stocks decreased with depth in both alpine meadow (AM) and alpine steppe (AS), but remain constant along the soil profile in alpine swamp meadow (ASM). Total phosphorus, Ca2+, and Mg2+ stocks slightly increased with depth in ASM. K+ stock decreased with depth, while Na+ stock increased slightly with depth among different vegetation types; however, SO42- and Cl- stocks remained relatively uniform throughout different depth intervals in the alpine grassland. Except for SOC and TN, soil nutrient stocks in the top 20 cm soils were significantly lower in ASM compared to those in AM and AS. Correlation analyses showed that SOC and TN stocks in the alpine grassland positively correlated with vegetation coverage, soil moisture, clay content, and silt content, while they negatively related to sand content and soil pH. However, base cation stocks revealed contrary relationships with those environmental variables compared to SOC and TN stocks. These correlations varied between vegetation types. In addition, no significant relationship was detected between topographic factors and soil nutrients. Our findings suggest that plant cycling and soil moisture primarily control vertical distributions of soil nutrients (e.g. K) in the alpine grassland and highlight that vegetation types in high-altitude permafrost regions significantly affect soil nutrients. (C) 2017 Elsevier B.V. All rights reserved.
收录类别	SCI
WOS关键词	QINGHAI-TIBETAN PLATEAU ; ORGANIC-CARBON ; CLIMATE-CHANGE ; ACTIVE LAYER ; TROPICAL FOREST ; PARENT MATERIAL ; THERMAL STATE ; GLOBAL-CHANGE ; PERMAFROST ; ECOSYSTEMS
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000408755300085
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2557672
专题	寒区旱区环境与工程研究所
通讯作者	Zhao, Lin
作者单位	1.Chinese Acad Sci, Cryosphere Res Stn Qinghai Tibetan Plateau, State Key Lab Cryospher Sci, Northwest Inst Ecoenvironm & Resources, 320 Donggang West Rd, Lanzhou 730000, Gansu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Lanzhou Univ, Coll Earth Environm Sci, Lanzhou 730000, Gansu, Peoples R China 4.Lanzhou Jiaotong Univ, Sch Environm & Municipal Engn, Lanzhou 730070, Gansu, Peoples R China 5.Baoji Univ Sci & Art, Sch Geog & Environm, Baoji 721013, Peoples R China
推荐引用方式 GB/T 7714	Tian, Liming,Zhao, Lin,Wu, Xiaodong,et al. Vertical patterns and controls of soil nutrients in alpine grassland: Implications for nutrient uptake[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2017,607:855-864.
APA	Tian, Liming.,Zhao, Lin.,Wu, Xiaodong.,Fang, Hongbing.,Zhao, Yonghua.,...&Chen, Hao.(2017).Vertical patterns and controls of soil nutrients in alpine grassland: Implications for nutrient uptake.SCIENCE OF THE TOTAL ENVIRONMENT,607,855-864.
MLA	Tian, Liming,et al."Vertical patterns and controls of soil nutrients in alpine grassland: Implications for nutrient uptake".SCIENCE OF THE TOTAL ENVIRONMENT 607(2017):855-864.

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