气候变化领域集成服务门户(CCPortal): Response of leaf stoichiometry of Oxytropis ochrocephala to elevation and slope aspect

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DOI	10.1016/j.catena.2020.104772
	Response of leaf stoichiometry of Oxytropis ochrocephala to elevation and slope aspect
	Cao, Jianjun; Wang, Xueyan; Adamowski, Jan F.; Biswas, Asim; Liu, Chunfang; Chang, Zongqiang; Feng, Qi
发表日期	2020
ISSN	0341-8162
EISSN	1872-6887
卷号	194
英文摘要	Slope aspect and elevation gradient, important topographic factors, affect plant growth and leaf carbon:nitrogen:phosphorus (C:N:P) stoichiometry by regulating local water and energy balances. The response of leaf stoichiometry to topographic factors reflects plant adaptation strategies to different habitats. Common in various grasslands across China, Oxytropis ochrocephala Bunge. is well known in pastoral areas for its toxicity. The effects of partial or full slope sunniness (south-facing) or shadiness (north-facing) and elevation (2400 m, 2600 m, 2800 m, 3000 m, or 3200 m) on the leaf C:N:P stoichiometry of O. ochrocephala was investigated in northwest China's Qilian Mountains. While leaf C:N:P stoichiometry of O. ochrocephala changed with elevation, there was no uniform pattern of change: the greatest leaf C and P concentrations ([C](leaf), and [P](leaf)) were measured at an elevation of 2800 m (417.81 g kg(-1) and 1.17 g kg(-1), respectively); the lowest [C](leaf) was 360.43 g kg(-1) at 2400 m, and the lowest [P](leaf) was 0.81 g kg(-1) at 2600 m. The greatest leaf N concentration ([N](leaf)) was 38.29 g kg(-1) at 3200 m, and the lowest was 31.94 g kg(-1) at 2600 m. Leaf C:N, C:P and N:P ratios were all relatively greater at 2600 m. Across the elevation gradient, O. ochrocephala leaf nutrient concentrations and their stoichiometries were mainly determined by mean annual temperature, soil organic carbon, and soil organic carbon to soil total phosphorus ratio. The [C](leaf), [N](leaf), and [P](leaf) were significantly greater on north-facing slope aspects (393.86 g kg(-1), 38.04 g kg(-1), and 1.16 g kg(-1), respectively) than on south-facing slope aspects (365.39 g kg(-1), 32.98 g kg(-1), and 0.92 g kg(-1), respectively). Leaf C:N, C:P, and N:P ratios were significantly lower on north-facing slope aspects (10.43, 416.49, and 39.73, respectively) than on south-facing slope aspects (11.14, 512.57, and 45.98, respectively). Differences in leaf nutrient concentrations and their stoichiometries in O. ochrocephala leaves between slope aspects were mainly determined by soil temperature and soil moisture content. In terms of leaf N:P ratios across the elevation gradient and the two slope aspects, results indicated that the growth of O. ochrocephala in the study region was mainly restricted by P.
英文关键词	Topographic factors; Leaf nutrient concentrations; Plant adaptation; Qilian Mountains
WOS研究方向	Geology ; Agriculture ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS关键词	PHOSPHORUS STOICHIOMETRY ; NUTRIENT LIMITATION ; CNP STOICHIOMETRY ; QILIAN MOUNTAINS ; P STOICHIOMETRY ; ECOLOGICAL STOICHIOMETRY ; ELEMENTAL STOICHIOMETRY ; SPATIAL-DISTRIBUTION ; NP STOICHIOMETRY ; SOIL NUTRIENTS
WOS记录号	WOS:000566699000077
来源期刊	CATENA
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239339
作者单位	[Cao, Jianjun; Wang, Xueyan] Northwest Normal Univ, Coll Geog & Environm Sci, Lanzhou 730070, Peoples R China; [Adamowski, Jan F.] McGill Univ, Fac Agr & Environm Sci, Dept Bioresource Engn, Ste Anne De Bellevue, PQ H9X 3V9, Canada; [Biswas, Asim] Univ Guelph, Sch Environm Sci, 50 Stone Rd East, Guelph, ON N1G 2W1, Canada; [Liu, Chunfang] Northwest Normal Univ, Coll Social Dev & Publ Adm, Lanzhou 730070, Peoples R China; [Liu, Chunfang] Gansu Engn Res Ctr Land Utilizat & Comprehens Con, Lanzhou 730070, Peoples R China; [Chang, Zongqiang] Chinese Acad Sci, Northwest Inst Ecol & Environm Resources, Lanzhou 730000, Peoples R China; [Feng, Qi] Chinese Acad Sci, Northwest Inst Ecol & Environm Resources, Key Lab Ecohydrol Inland River Basin, Alashan Desert Ecohydrol Expt Res Stn, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Cao, Jianjun,Wang, Xueyan,Adamowski, Jan F.,et al. Response of leaf stoichiometry of Oxytropis ochrocephala to elevation and slope aspect[J]. 中国科学院西北生态环境资源研究院,2020,194.
APA	Cao, Jianjun.,Wang, Xueyan.,Adamowski, Jan F..,Biswas, Asim.,Liu, Chunfang.,...&Feng, Qi.(2020).Response of leaf stoichiometry of Oxytropis ochrocephala to elevation and slope aspect.CATENA,194.
MLA	Cao, Jianjun,et al."Response of leaf stoichiometry of Oxytropis ochrocephala to elevation and slope aspect".CATENA 194(2020).