干旱区生态环境知识资源中心(Arid): A quantitative study of the influence of soil organic carbon and pore characteristics on the stability of aggregates of the karst peak-cluster depression area in Southwest China

Arid

DOI	10.1007/s11368-022-03318-5
	A quantitative study of the influence of soil organic carbon and pore characteristics on the stability of aggregates of the karst peak-cluster depression area in Southwest China
	Wei, Hui; Deng, Yusong; Huang, Juan; He, Ling; Tang, Qiuyue; Xiao, Yan
通讯作者	Deng, YS
来源期刊	JOURNAL OF SOILS AND SEDIMENTS
ISSN	1439-0108
EISSN	1614-7480
出版年	2023
卷号	23 期号:1 页码:312-330
英文摘要	Purpose Rock desertification is the most serious ecological problem in karst areas and can easily cause soil structure instability. The aim of this work was to analyze the influences of organic carbon, carbon components and pore structural differences on the stability of aggregates in rocky desertification areas. Materials and methods Soil samples were collected from the karst peak-cluster depression area in Southwest China. Soil aggregate stability was determined by the Le Bissonnais (LB) method. The relationship between variables was analyzed via the structural equation model (SEM). Results and discussion There were significant differences in the stability of aggregates among different land uses in the study area: secondary forest (SF) > coppice forest (CF) > plantation forest (PF) > citrus plantation (CP) > cultivated land (CL). The main crushing mechanisms of aggregates were slaking and mechanical failure. Aggregate pores were mainly < 30 mu m storage pores, with pore throat diameters concentrated in the 0-20 mu m range, which was associated with the cohesive soil texture of the study area. The pore connectivity of aggregates was better in SF and CF, followed by PF, while CP and CL had lower colloidal material contents, isolated pore structure and poor connectivity due to the heavy application of inorganic fertilizers and influences from human disturbances. Conclusions SEM analysis showed that SOC and POC determined aggregate stability, mainly by directly or indirectly influencing aggregate porosity and the number of storage pores. The POC was the main variable in organic carbon composition to determine the pore characteristics and stability of aggregates. To meet the bidirectional demand of production and improvement of soil structure, it is necessary to rationally distribute fertilizer and reduce disturbance frequency in agricultural production land.
英文关键词	The peak-cluster depression area Aggregate pore Soil organic carbon Computed tomography (CT) scan Aggregate stability
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000842771600001
WOS关键词	MICRO-COMPUTED TOMOGRAPHY ; X-RAY MICROTOMOGRAPHY ; MERCURY INTRUSION ; SIZE DISTRIBUTION ; MATTER ; MANAGEMENT ; POROSITY ; TILLAGE ; FERTILIZATION ; IRON
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397565
推荐引用方式 GB/T 7714	Wei, Hui,Deng, Yusong,Huang, Juan,et al. A quantitative study of the influence of soil organic carbon and pore characteristics on the stability of aggregates of the karst peak-cluster depression area in Southwest China[J],2023,23(1):312-330.
APA	Wei, Hui,Deng, Yusong,Huang, Juan,He, Ling,Tang, Qiuyue,&Xiao, Yan.(2023).A quantitative study of the influence of soil organic carbon and pore characteristics on the stability of aggregates of the karst peak-cluster depression area in Southwest China.JOURNAL OF SOILS AND SEDIMENTS,23(1),312-330.
MLA	Wei, Hui,et al."A quantitative study of the influence of soil organic carbon and pore characteristics on the stability of aggregates of the karst peak-cluster depression area in Southwest China".JOURNAL OF SOILS AND SEDIMENTS 23.1(2023):312-330.