干旱区生态环境知识资源中心(Arid): Coupling and synergistic relationships between soil aggregate stability and nutrient stoichiometric characteristics under different microtopographies on karst rocky desertification slopes

Arid

DOI	10.1016/j.catena.2024.108142
	Coupling and synergistic relationships between soil aggregate stability and nutrient stoichiometric characteristics under different microtopographies on karst rocky desertification slopes
	Bi, Mingfeng; Zhang, Shuaipu; Xu, Qinxue; Hou, Senzheng; Han, Mengwei; Yu, Xinrui
通讯作者	Zhang, SP
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2024
卷号	243
英文摘要	Various microtopographical features are formed by exposed bedrock and surrounding soil in karst rocky desertification areas. These microtopographical features significantly change the aggregate stability and nutrient stoichiometric ratios, thereby affecting soil quality. However, little research has been conducted on the effects of microtopography on soil aggregates and nutrient stoichiometric ratios in karst regions and on soil quality in micro-habitats. In this study, aggregates and nutrients in the soils of six typical microgeomorphological units from karstic rocky desertification slopes were experimentally analysed. A degree of coupling model was employed to reveal the coupling and synergy relationships between soil aggregates and the stoichiometric ratios of carbon, nitrogen and phosphorus for different microtopographical features. The results showed that microtopography significantly affected on the distribution of soil aggregates and soil carbon, nitrogen and phosphorus contents. The soil aggregate stability (based on the mean weight diameter (MWD)) was the highest in stone nests and the lowest on the soil surface. Stone crevice soil had the highest soil organic carbon (SOC), hydrolytic nitrogen (HN) and total nitrogen (TN) contents. The available phosphorus (AP) content of soil surface was significantly greater than that of stone crevices, stone caves, stone ditches, stone surfaces and stone nest soils. Correlation analyses showed that silt had a positive effect on aggregate stability and soil organic carbon. The coupling synergy degree between soil aggregates and nutrient stoichiometric ratios were lowest for the soil surface soils, and much lower than for the stone nest and stone crevice soils. The above results show that microtopography is the dominant factor affecting soil aggregate stability and soil nutrient characteristics in karst slopes, and can serve as a reference for the ecologically sound management of rocky desertification areas.
英文关键词	Microtopographical features Stoichiometric ratio Soil aggregates Soil quality Coupling coordination degree
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001261067800001
WOS关键词	CONTRASTING LAND-USE ; ORGANIC-MATTER ; LOESS PLATEAU ; VEGETATION RESTORATION ; CARBON ; NITROGEN ; PHOSPHORUS ; MANAGEMENT ; FRACTIONS ; DYNAMICS
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403165
推荐引用方式 GB/T 7714	Bi, Mingfeng,Zhang, Shuaipu,Xu, Qinxue,et al. Coupling and synergistic relationships between soil aggregate stability and nutrient stoichiometric characteristics under different microtopographies on karst rocky desertification slopes[J],2024,243.
APA	Bi, Mingfeng,Zhang, Shuaipu,Xu, Qinxue,Hou, Senzheng,Han, Mengwei,&Yu, Xinrui.(2024).Coupling and synergistic relationships between soil aggregate stability and nutrient stoichiometric characteristics under different microtopographies on karst rocky desertification slopes.CATENA,243.
MLA	Bi, Mingfeng,et al."Coupling and synergistic relationships between soil aggregate stability and nutrient stoichiometric characteristics under different microtopographies on karst rocky desertification slopes".CATENA 243(2024).