干旱区生态环境知识资源中心(Arid): Soil fertility thresholds driven by sand content indicate drylands degradation phases on the Tibetan Plateau

Arid

DOI	10.1002/ldr.4682
	Soil fertility thresholds driven by sand content indicate drylands degradation phases on the Tibetan Plateau
	Cai, Qin-Yue; Wang, Xiang-Sheng; Ma, Tao; Ye, Jian-Sheng
通讯作者	Ye, JS
来源期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
EISSN	1099-145X
出版年	2023
卷号	34 期号:11 页码:3272-3280
英文摘要	Understanding the process of dryland degradation is crucial to combating desertification and maintaining land sustainability. To identify important indicators of dryland degradation, we conducted a field survey of 46 drylands spanning an aridity gradient across the Tibetan Plateau. Our random forest model suggested that soil sand content was the most important predictor of variation in soil fertility (carbon, nitrogen, and phosphorus). Most soil fertility showed a nonlinear and abrupt decline with increasing soil sand content, and displayed three sequential thresholds. First, soil organic carbon sharply decreased beyond a soil sand content threshold of 47%. Second, exceeding a subsequent threshold of 70%, the total nitrogen and light fraction carbon declined dramatically with increasing soil sand content. Finally, soil heavy fraction carbon, inorganic carbon, and total carbon were drastically reduced when the soil sand content exceeded 80%. The three soil fertility thresholds along the gradient of the soil sand content indicated a sequence of dryland degradation phases. Our findings provide an approach for detecting the severity of dryland degradation and suggest vulnerable areas of degradation on the Tibetan Plateau.
英文关键词	dryland degradation soil fertility soil function soil sand content vegetation greenness
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000954745700001
WOS关键词	ORGANIC-CARBON ; VEGETATION COVERAGE ; FRACTIONS ; ECOSYSTEM ; MULTIFUNCTIONALITY ; DESERTIFICATION ; RESTORATION ; GRASSLAND ; TILLAGE ; EROSION
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/2XILL650/397746
推荐引用方式 GB/T 7714	Cai, Qin-Yue,Wang, Xiang-Sheng,Ma, Tao,et al. Soil fertility thresholds driven by sand content indicate drylands degradation phases on the Tibetan Plateau[J],2023,34(11):3272-3280.
APA	Cai, Qin-Yue,Wang, Xiang-Sheng,Ma, Tao,&Ye, Jian-Sheng.(2023).Soil fertility thresholds driven by sand content indicate drylands degradation phases on the Tibetan Plateau.LAND DEGRADATION & DEVELOPMENT,34(11),3272-3280.
MLA	Cai, Qin-Yue,et al."Soil fertility thresholds driven by sand content indicate drylands degradation phases on the Tibetan Plateau".LAND DEGRADATION & DEVELOPMENT 34.11(2023):3272-3280.