Changes in soil C:N:P stoichiometry along an aridity gradient in drylands of northern China

doi:10.1016/j.geoderma.2019.114087

	Changes in soil C:N:P stoichiometry along an aridity gradient in drylands of northern China
	Wang, Xiao-Guang ; Lu, Xiao-Tao ; Zhang, Hai-Yang ; Dijkstra, Feike A.; Jiang, Yan-Gao ; Wang, Xiao-Bo ; Lu, Jia-Yu ; Wuyunna 1; Wang, Zheng-Wen ; Han, Xing-Guo
	2020
发表期刊	GEODERMA
ISSN	0016-7061
卷号	361
摘要	Changes in soil carbon (C): nitrogen (N): phosphorus (P) stoichiometric ratios have significant influences on biogeochemical cycles and ecosystem functions. Soil C, N, and P dynamics are closely related to climatic aridity and soil texture, two factors that are not easily separated at large spatial scale due to their geographic co-variation. While it is well understood that soil C, N, and P cycling are decoupled and soil C:N:P ratios change across climatic gradients, we know little about the role of soil texture in mediating such stoichiometric variation. Here, we examined the regional variation of soil C:N:P ratios with changes in aridity and soil texture based on observations from 57 sites along a 3000-km aridity transect in drylands of northern China. Across the aridity gradient, C:N ratios of bulk soil first decreased and then increased with increasing aridity with a threshold at the aridity value of 0.8 (aridity defined here as 1-precipitation/evapotranspiration), whereas C:P and N:P ratios of bulk soil significantly decreased with increasing aridity. Across the transect, C:N ratios in bulk soils were positively related to sand contents and negatively related to silt and clay contents, while C:P and N:P ratios in bulk soils were negatively related to sand contents and positively related to silt and clay contents. Aridity, soil pH, and silt contents could best predict the variations in bulk soil C:N and N:P ratios, while aridity, soil pH, and clay contents were the most significant variables driving the bulk soil C:P ratio. Aridity could play a more important role than soil texture in driving variations of soil C:N:P ratios, where the predicted increases in aridity in drylands could cause imbalances in the biogeochemical cycles of C, N and P. Our results further highlight the role of soil texture in driving stoichiometric flexibility of soil C:N:P ratios across the aridity gradient, in that elementspecific correlations with soil texture played an important role in regulating the decoupled soil C:N:P stoichiometry in response to increasing aridity.
关键词	Biogeochemistry Drought stress Elemental stoichiometry Soil nutrients Soil texture Soil particle-size fraction
学科领域	Soil Science
DOI	10.1016/j.geoderma.2019.114087
收录类别	SCI
语种	英语
WOS关键词	PARTICLE-SIZE FRACTIONS ; N-P STOICHIOMETRY ; ORGANIC-MATTER ; TERRESTRIAL ECOSYSTEMS ; CLIMATE-CHANGE ; CARBON ; NITROGEN ; PHOSPHORUS ; STORAGE ; GRASSLANDS
WOS研究方向	Agriculture
WOS记录号	WOS:000510804700056
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	1872-6259
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31822006, 31770503, 31600363] ; National Key Research and Development Program of China [2016YFC0500601] ; Liaoning Revitalizing Talents Program [XLYC1807061] ; Shenyang Science and Technology Bureau [18-013-0-04, RC180320] ; Youth Innovation Promotion Association CAS [2014174] ; Fundamental Research Funds for the Central Universities (Program for ecology research group) ; National Scholarship for Overseas Studying from China Scholarship Council (CSC) [201808210005]
作者邮箱	lvxiaotao@iae.ac.cn
引用统计	被引频次：35[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/21935
专题	植被与环境变化国家重点实验室
作者单位	1.[Wang, Xiao-Guang 2.Lu, Xiao-Tao 3.Zhang, Hai-Yang 4.Wang, Xiao-Bo 5.Lu, Jia-Yu 6.Wang, Zheng-Wen 7.Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Erguna Forest Steppe Ecotone Res Stn, Shenyang 110016, Peoples R China 8.Dalian Minzu Univ, Coll Environm & Resource Sci, Dalian 116600, Peoples R China 9.Dijkstra, Feike A.] Univ Sydney, Sch Life & Environm Sci, Sydney Inst Agr, Sydney, NSW 2006, Australia 10.Western Sydney Univ, Hawkesbury Inst Environm, Penrith, NSW 2753, Australia 11.Shenyang Normal Univ, Expt Teaching Ctr, Shenyang 110034, Peoples R China 12.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Changes, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xiao-Guang,Lu, Xiao-Tao,Zhang, Hai-Yang,et al. Changes in soil C:N:P stoichiometry along an aridity gradient in drylands of northern China[J]. GEODERMA,2020,361.
APA	Wang, Xiao-Guang.,Lu, Xiao-Tao.,Zhang, Hai-Yang.,Dijkstra, Feike A..,Jiang, Yan-Gao.,...&Han, Xing-Guo.(2020).Changes in soil C:N:P stoichiometry along an aridity gradient in drylands of northern China.GEODERMA,361.
MLA	Wang, Xiao-Guang,et al."Changes in soil C:N:P stoichiometry along an aridity gradient in drylands of northern China".GEODERMA 361(2020).

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