干旱区生态环境知识资源中心(Arid): Impacts of abandoned sloping farmland on soil aggregates and aggregate-associated organic carbon in karst rocky desertification areas

Arid

DOI	10.1007/s10661-023-12024-9
	Impacts of abandoned sloping farmland on soil aggregates and aggregate-associated organic carbon in karst rocky desertification areas
	Lu, Yonghuan; Dai, Quanhou; Yi, Xingsong; Li, Huamei; Peng, Huidan; Tan, Juan
通讯作者	Dai, QH
来源期刊	ENVIRONMENTAL MONITORING AND ASSESSMENT
ISSN	0167-6369
EISSN	1573-2959
出版年	2023
卷号	195 期号:12
英文摘要	Vegetation restoration after the abandonment of sloping farmland can effectively promote the sequestration of soil organic carbon (SOC), with soil aggregates playing a pivotal role. However, in abandoned farmlands in karst regions with varying degrees of rocky desertification, the relationship between soil aggregates, aggregate-associated organic carbon (AAOC), and total SOC content remains unclear. Taking abandoned sloping farmlands (5 years, 10 years, and 15 years) with different levels of rocky desertification (no rocky desertification, potential rocky desertification, slight rocky desertification, and moderate rocky desertification) in a typical karst area as research objects, this study investigated the dynamic characteristics of the particle size distribution of soil aggregates, total SOC, and AAOC. The results indicated that total SOC content in the 0-20 cm soil layer increased after abandonment in all levels of rocky desertification, peaking after 15 years. The abandoned sloping farmland with moderate desertification showed the best recovery effect. Post-abandonment vegetation restoration increased the content of 5-10 mm soil aggregates, but decreased those of 1-2 mm and < 0.25 mm aggregates. Particularly for 5-10 mm aggregates, the contribution of AAOC to total SOC significantly increased over time. Moreover, a strong correlation was observed between >1 mm aggregates and total SOC (p < 0.05). The increase in total SOC was primarily driven by the growth of AAOC in 5-10 mm aggregates. In general, vegetation restoration is an effective approach for enhancing total SOC content in abandoned sloping farmland with varying degrees of rocky desertification.
英文关键词	Aggregate-associated organic carbon Karst Abandonment Rocky desertification
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:001098035600004
WOS关键词	NO-TILLAGE ; C SEQUESTRATION ; STABILIZATION ; STABILITY ; DYNAMICS ; NITROGEN ; MATTER ; MECHANISMS ; EROSION
WOS类目	Environmental Sciences
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/2XILL650/396194
推荐引用方式 GB/T 7714	Lu, Yonghuan,Dai, Quanhou,Yi, Xingsong,et al. Impacts of abandoned sloping farmland on soil aggregates and aggregate-associated organic carbon in karst rocky desertification areas[J],2023,195(12).
APA	Lu, Yonghuan,Dai, Quanhou,Yi, Xingsong,Li, Huamei,Peng, Huidan,&Tan, Juan.(2023).Impacts of abandoned sloping farmland on soil aggregates and aggregate-associated organic carbon in karst rocky desertification areas.ENVIRONMENTAL MONITORING AND ASSESSMENT,195(12).
MLA	Lu, Yonghuan,et al."Impacts of abandoned sloping farmland on soil aggregates and aggregate-associated organic carbon in karst rocky desertification areas".ENVIRONMENTAL MONITORING AND ASSESSMENT 195.12(2023).