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	Variation of soil organic carbon, nitrogen, and phosphorus stoichiometry and biogeographic factors across the desert ecosystem of Hexi Corridor, northwestern China
	Zhang, Ke1,2,3; Su, Yongzhong4; Yang, Rong4
刊名	JOURNAL OF SOILS AND SEDIMENTS
	2019
卷号	19期号:1页码:49-57
关键词	Aridity Desert ecosystem Hexi Corridor Nitrogen and phosphorus Soil organic carbon Stoichiometry
ISSN号	1439-0108
DOI	10.1007/s11368-018-2007-2
通讯作者	Su, Yongzhong(suyzh@lzb.ac.cn)
英文摘要	PurposeThe purposes of present study were to display the vertical distribution of soil organic carbon (SOC), nitrogen (N), and phosphorus (P) stoichiometry; identify the biogeographic characteristics of SOC, N, and P stoichiometry along an aridity gradient across the desert ecosystem of Hexi Corridor; and determine how biogeographic distribution patterns of SOC, N, and P stoichiometry are related to vegetation, soil texture, geography, and climate.Materials and methodsWe investigated the distribution and characteristics of SOC, N, and P stoichiometry based on samples collected from Hexi Corridor during 2011-2012 with total 400 plots of 80 sites. This region presents a precipitation gradient from about 250mm in the east to less than 50mm in the west. The measured variables included belowground and aboveground biomass, pH, bulk density, sand, clay, silt, SOC, N, and P contents. ANOVA analysis, reduced major axis, redundancy analysis, Person's correlation, and regression analysis were used to analysis the variation of SOC, N, and P stoichiometry and related biogeographic factors.Results and discussionIn present study, SOC, N, and P contents decreased significantly with increasing soil depth. C/N did not change significantly, while C/P and N/P decreased significantly. SOC and N, SOC and P, and N and P were well constrained within 0-100cm. SOC, N, and P contents in 0-20cm were higher than them in other studies. Vegetation, soil texture, climate, and geography could explain 91.6% of the total variance of soil stoichiometry. The impact of latitude and longitude on SOC, N, and P stoichiometry was mainly caused by the redistribution of precipitation, while the impact of altitude mainly resulted from the variation of temperature. With increasing aridity, SOC, N, and P contents and C/N/P ratios reduced consistently with inconsistent decrease rates.ConclusionsOur results suggested that the interaction of vegetation structure, soil condition, and shortage of precipitation should be the main driver for the lower contents and much shallower distributions of SOC, N, and P of Hexi Corridor. The increasing aridity should be the critical factor that is responsible for the decrease of SOC, N, and P contents and C/N/P ratios. This study contributes to the understanding of soil stoichiometry in the desert ecosystem.
收录类别	SCI
WOS关键词	N-P STOICHIOMETRY ; ARIDITY ; PATTERNS ; CLIMATE ; TEMPERATURE ; GRASSLAND ; IMBALANCE ; BIOMASS ; STORAGE ; CYCLES
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
WOS类目	Environmental Sciences ; Soil Science
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000456207800005
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558189
专题	寒区旱区环境与工程研究所
通讯作者	Su, Yongzhong
作者单位	1.Zhengzhou Univ Light Ind, Dept Mat & Chem Engn, Zhengzhou 450000, Henan, Peoples R China 2.China Natl Light Ind, Key Lab Pollut Treatment & Resource, Zhengzhou 450000, Henan, Peoples R China 3.Collaborat Innovat Ctr Environm Pollut Control &, Zhengzhou 450000, Henan, Peoples R China 4.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Linze Inland River Basin Res Stn, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Ke,Su, Yongzhong,Yang, Rong. Variation of soil organic carbon, nitrogen, and phosphorus stoichiometry and biogeographic factors across the desert ecosystem of Hexi Corridor, northwestern China[J]. JOURNAL OF SOILS AND SEDIMENTS,2019,19(1):49-57.
APA	Zhang, Ke,Su, Yongzhong,&Yang, Rong.(2019).Variation of soil organic carbon, nitrogen, and phosphorus stoichiometry and biogeographic factors across the desert ecosystem of Hexi Corridor, northwestern China.JOURNAL OF SOILS AND SEDIMENTS,19(1),49-57.
MLA	Zhang, Ke,et al."Variation of soil organic carbon, nitrogen, and phosphorus stoichiometry and biogeographic factors across the desert ecosystem of Hexi Corridor, northwestern China".JOURNAL OF SOILS AND SEDIMENTS 19.1(2019):49-57.

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