干旱区生态环境知识资源中心(Arid): Patterns and environmental controls of soil organic carbon density in Chinese shrublands

Arid

DOI	10.1016/j.geoderma.2019.114161
	Patterns and environmental controls of soil organic carbon density in Chinese shrublands
	Ge, Jielin 1; Xu, Wenting 1; Liu, Qing 2,3; Tang, Zhiyao 4,5; Xie, Zongqiang 1,6
通讯作者	Tang, Zhiyao ; Xie, Zongqiang
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2020
卷号	363
英文摘要	The soils of shrublands are important for organic carbon storage in terrestrial ecosystems, but geographical patterns and environmental controls of soil organic carbon (SOC) remain largely understudied compared to other terrestrial ecosystems, leaving a significant gap in our understanding of terrestrial ecosystem carbon budgets. Here, we quantified SOC density (SOCD) and its potential determinants based on a comprehensive dataset with a consistent stratified random sampling of extensive soil profiles down to the parent material or to one meter depth across 1211 sites across China. Our up-to-date estimate of SOCD in Chinese shrublands is an average of 8.36 kg m(-2), and ca. 43% of SOC is stored in the upper 20 cm relative to the one meter top soil, which is higher than estimates for shrublands globally. We also observed that SOCD was positively related to shrubland biomass and more so with belowground biomass. Furthermore, SOCD was positively related to mean annual precipitation (MAP), soil total nitrogen (N), phosphorus (P), clay and silt percent, but decreased with increasing mean annual temperature (MAT). Dark felty soils stored the highest SOCD and frigid desert soils stored the lowest. Soil total nitrogen (N), MAP, soil type, MAT, and belowground biomass, soil clay, and pH were the best predictors of total SOCD in Chinese shrublands. We concluded that Chinese shrubland soils store the lowest density of organic carbon so far recorded compared to forests and grasslands, and that the vertical distribution of SOC in Chinese shrublands was much shallower. While both climate (in particular MAP) and soil total N exerted dominant control over geographical patterns of SOCD across Chinese shrublands, soil type also played a significant role. Our study also emphasizes this key role of edaphic variables in determining the SOCD of shrublands and that they should be better incorporated into large-scale assessments of SOC dynamics. Our study extends existing work conducted in forest and grasslands and provides the most up-to-date knowledge on benchmark values for SOCD in Chinese shrublands, with important implications for predicting the fate of C stored in shrubland soils in response to climate change.
英文关键词	Carbon sequestration Geographical pattern Climate-vegetation-soil relationship Soil carbon storage
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000515198500024
WOS关键词	TERRESTRIAL ECOSYSTEMS ; PRECIPITATION GRADIENT ; FOREST SOILS ; STORAGE ; STOCKS ; CLIMATE ; POOLS ; SEQUESTRATION ; VARIABILITY ; DRIVERS
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	北京大学 ; 中国科学院植物研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314584
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China; 2.Chinese Acad Sci, Chengdu Inst Biol, CAS Key Lab Mt Ecol Restorat & Bioresource Utiliz, Chengdu 610041, Peoples R China; 3.Chinese Acad Sci, Chengdu Inst Biol, Ecol Restorat Biodivers Conservat Key Lab Sichuan, Chengdu 610041, Peoples R China; 4.Peking Univ, Coll Urban & Environm Sci, Dept Ecol, Beijing 100871, Peoples R China; 5.Peking Univ, Key Lab Earth Surface Proc, Beijing 100871, Peoples R China; 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ge, Jielin,Xu, Wenting,Liu, Qing,et al. Patterns and environmental controls of soil organic carbon density in Chinese shrublands[J]. 北京大学, 中国科学院植物研究所,2020,363.
APA	Ge, Jielin,Xu, Wenting,Liu, Qing,Tang, Zhiyao,&Xie, Zongqiang.(2020).Patterns and environmental controls of soil organic carbon density in Chinese shrublands.GEODERMA,363.
MLA	Ge, Jielin,et al."Patterns and environmental controls of soil organic carbon density in Chinese shrublands".GEODERMA 363(2020).