干旱区生态环境知识资源中心(Arid): Soil water retention modulates effects of soil nutrients and stoichiometry on stability of organic carbon in a karst region, Southwestern China

Arid

DOI	10.1007/s11104-023-06041-3
	Soil water retention modulates effects of soil nutrients and stoichiometry on stability of organic carbon in a karst region, Southwestern China
	He, Jie; Dai, Quanhou; Yi, Xingsong; Wang, Yong; Peng, Xudong; Yan, Youjin
通讯作者	Dai, QH
来源期刊	PLANT AND SOIL
ISSN	0032-079X
EISSN	1573-5036
出版年	2023
卷号	489 期号:1-2 页码:557-572
英文摘要	AimsThe inhomogeneity of bare rock distribution and the diversity of underground rock structure in different soil-rock microsites resulted in high soil heterogeneity. The aim of this study was to investigate the responses of soil nutrients and stoichiometry to soil-rock microsites and evaluate the relationship between soil substrate and SOC stabilityMethodsSix soil-rock microsite types were selected in a karst area of Southwest China, including rocky soil surface (RSS), stone crevice (SC), stone gully (SG), stone cave (SCA), stone pit (SP) and soil surface (SS). Soil samples were collected from 0-10, 10-20 and 20-30 cm depths, and three carbon fractions were isolated by combining flotation and screening.ResultsThe stocks of carbon (C), nitrogen (N), phosphorus (P) and sulfur (S) in the soil profile among different soil-rock microsites were in the order of SS > RSS > SG > SC > SCA > SP. SCA and SS contained the highest and lowest values of C, N, P and S densities, respectively. The N, P and S were positively correlated with LF/SOC and negatively with MF/SOC, stoichiometric ratios were also negatively with MF/SOC. Moreover, the saturation moisture content, capillary moisture capacity, and saturated hydraulic conductivity are important indicators that affect the SOC stability.ConclusionsThese results imply that soil-rock microsites regulate the stability of SOC by affecting the heterogeneity of soil nutrients and water, and the retention of soil water modulates the effects of soil nutrients and stoichiometry on the stability of SOC in karst areas.
英文关键词	Rocky desertification Soil-rock microsite Soil nutrient densities Stoichiometric ratios Soil organic carbon
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000981326800001
WOS关键词	LAND-USE ; FRACTIONS ; NITROGEN ; PHOSPHORUS ; SULFUR ; SEQUESTRATION ; MANAGEMENT ; INTENSITY ; ECOSYSTEM ; TILLAGE
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS研究方向	Agriculture ; Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/398018
推荐引用方式 GB/T 7714	He, Jie,Dai, Quanhou,Yi, Xingsong,et al. Soil water retention modulates effects of soil nutrients and stoichiometry on stability of organic carbon in a karst region, Southwestern China[J],2023,489(1-2):557-572.
APA	He, Jie,Dai, Quanhou,Yi, Xingsong,Wang, Yong,Peng, Xudong,&Yan, Youjin.(2023).Soil water retention modulates effects of soil nutrients and stoichiometry on stability of organic carbon in a karst region, Southwestern China.PLANT AND SOIL,489(1-2),557-572.
MLA	He, Jie,et al."Soil water retention modulates effects of soil nutrients and stoichiometry on stability of organic carbon in a karst region, Southwestern China".PLANT AND SOIL 489.1-2(2023):557-572.