气候变化领域集成服务门户(CCPortal): Soil C, N, and P and C:N:P stoichiometry associated with environmental factors in two typical alpine grasslands in northern Tibet

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DOI	10.1007/s11368-023-03567-y
	Soil C, N, and P and C:N:P stoichiometry associated with environmental factors in two typical alpine grasslands in northern Tibet
	Lu, Qing; Fan, Huanhuan; Yan, Bing; Zhao, Dongsheng; Wei, Xiaojian
发表日期	2023
ISSN	1439-0108
EISSN	1614-7480
起始页码	3735
结束页码	3747
卷号	23 期号:11
英文摘要	PurposeSoil nutrient stoichiometry and their environmental control are critical for assessing biogeochemical cycling, maintaining ecosystem function, and sustainable development. This study investigated how soil chemical measurements such as soil organic carbon (SOC), total nitrogen (TN), and total phosphorus (TP) vary with soil depth in northern Tibet, and how they regulate various grassland ecosystems.Materials and methodsNormalized difference vegetation index (NDVI), soil physicochemical properties, and geo-climatic factors data were collected from 57 sampling sites. Using analysis of variance and rank-sum test, we studied differences in SOC, TN, and TP contents and their stoichiometry between alpine meadows (AM) and alpine steppe (AS), and among four soil layers (0-10 cm, 10-20 cm, 20-30 cm, and 30-50 cm depth), using Spearman correlation analysis and redundancy analysis (RDA) to determine the dominant environmental factors.Results and discussionAM soil always had more SOC, TN, and TP than AS soil. The C:N (R-CN) and C:P ratios (R-CP) differed mainly in response to the type of alpine grassland in the uppermost soil layer, whereas differences in the N:P ratios (R-NP) were not significant throughout all strata. These nutrients and ratios decreased with increasing soil depth, and the differences between the uppermost and deepest soil layers were significant. Correlation analysis revealed that soil properties and geo-climatic factors were more closely related to SOC, TN, and TP and their stoichiometry in AM than in AS. RDA revealed that soil factors mainly contributed to soil nutrients and stoichiometry in uppermost soil layer while geo-climate did in deeper three soil layer.ConclusionsOur research, which highlights how soil C:N:P ratios in northern Tibet depend on background soil characteristics, can be used to optimize soil stoichiometry for ecosystem functions and sustainable development.
关键词	Alpine meadow Alpine steppe Soil nutrients Stoichiometric ratio Northern Tibet
英文关键词	ORGANIC-CARBON; CLIMATE-CHANGE; VEGETATION CHANGE; LAND-USE; PHOSPHORUS; NITROGEN; TEMPERATURE; RESTORATION; PLATEAU; REGION
WOS研究方向	Environmental Sciences ; Soil Science
WOS记录号	WOS:001009383300001
来源期刊	JOURNAL OF SOILS AND SEDIMENTS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282787
作者单位	East China University of Technology; Ministry of Natural Resources of the People's Republic of China; East China University of Technology; Jiangxi Academy of Sciences; Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS
推荐引用方式 GB/T 7714	Lu, Qing,Fan, Huanhuan,Yan, Bing,et al. Soil C, N, and P and C:N:P stoichiometry associated with environmental factors in two typical alpine grasslands in northern Tibet[J],2023,23(11).
APA	Lu, Qing,Fan, Huanhuan,Yan, Bing,Zhao, Dongsheng,&Wei, Xiaojian.(2023).Soil C, N, and P and C:N:P stoichiometry associated with environmental factors in two typical alpine grasslands in northern Tibet.JOURNAL OF SOILS AND SEDIMENTS,23(11).
MLA	Lu, Qing,et al."Soil C, N, and P and C:N:P stoichiometry associated with environmental factors in two typical alpine grasslands in northern Tibet".JOURNAL OF SOILS AND SEDIMENTS 23.11(2023).