干旱区生态环境知识资源中心(Arid): The Characteristics of Soil C, N and P and Stoichiometric Ratios as Affected by Land-Use in a Karst Area, Southwest China

Arid

DOI	10.3390/land12061126
	The Characteristics of Soil C, N and P and Stoichiometric Ratios as Affected by Land-Use in a Karst Area, Southwest China
	Ma, Yang; Zhang, Chunlai; Yang, Hui; Xu, Yikai; Chen, Yan; Ning, Jing
通讯作者	Zhang, CL
来源期刊	LAND
EISSN	2073-445X
出版年	2023
卷号	12 期号:6
英文摘要	Chemometric analysis is often used as an effective indicator of the supply capacity of nutrients in soil-plant systems and their biogeochemical cycles. Understanding ecological stoichiometric characteristics of C, N and P in soils under various land uses is crucial to guide ecological restoration and agricultural cultivation in karst rocky desertification region. However, data on ecological stoichiometry at different land uses in karst areas is limited. This study aimed to evaluate the effects of different land uses on soil ecological stoichiometric ratios and further identify the factors that influence soil ecological stoichiometric ratios. The topsoil from forest, shrub and cultivated land (paddy field and dry land) both in a karst area and non-karst area (as a reference) of Mashan County was sampled to investigate the spatial variance of the ecological stoichiometric characteristics of C, N and P under different land uses. The results show that: (1) Land-use types significantly determined the spatial heterogeneity of soil ecological stoichiometry in karst areas. (2) Soil organic carbon (SOC) was not significantly different between shrubs in the karst area and forests in the non-karst area (p = 0.595), but there were virtual differences in total nitrogen (TN), total phosphorus (TP), C:N, C:P and N:P between shrubs in the karst area and forests in the non-karst area (p < 0.01). (3) The contents of SOC, TN, and C:P, N:P in the study area were all generally higher in forests than those in cultivated land, and the content of TP was lower in forests than cultivated land, while C:N in cultivated land was higher than in shrubs in karst areas, and C:N was higher in forests than in cultivated land in non-karst areas. (4) Available nitrogen (AvN) was the main factor influencing stoichiometry in shrubs in karst areas, while pH, AvN, available phosphorus and elevation were the main factors in forests in non-karst areas, indicating that these factors significantly affect the soil ecological stoichiometric ratio during land-use changes. This study helps to understand the variations in soil ecological stoichiometric ratios under land-use changes. It provides guidance for the sustainable management of revegetation in karst regions in southwest China.
英文关键词	soil nutrients stoichiometric ratios karst area geographical detector land use
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SSCI
WOS记录号	WOS:001014479400001
WOS关键词	CNP STOICHIOMETRY ; ORGANIC-CARBON ; LOESS PLATEAU ; NITROGEN ; PHOSPHORUS ; AFFORESTATION ; COMMUNITY ; DIVERSITY ; SIZE
WOS类目	Environmental Studies
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397666
推荐引用方式 GB/T 7714	Ma, Yang,Zhang, Chunlai,Yang, Hui,et al. The Characteristics of Soil C, N and P and Stoichiometric Ratios as Affected by Land-Use in a Karst Area, Southwest China[J],2023,12(6).
APA	Ma, Yang,Zhang, Chunlai,Yang, Hui,Xu, Yikai,Chen, Yan,&Ning, Jing.(2023).The Characteristics of Soil C, N and P and Stoichiometric Ratios as Affected by Land-Use in a Karst Area, Southwest China.LAND,12(6).
MLA	Ma, Yang,et al."The Characteristics of Soil C, N and P and Stoichiometric Ratios as Affected by Land-Use in a Karst Area, Southwest China".LAND 12.6(2023).