干旱区生态环境知识资源中心(Arid): Variation in shear strength of soil-root system under five typical land use types on the Loess Plateau of China

Arid

DOI	10.1016/j.catena.2022.106883
	Variation in shear strength of soil-root system under five typical land use types on the Loess Plateau of China
	Xing, Shukun; Zhang, Guanghui; Zhu, Pingzong; Wang, Lili; Wang, Ziguan; Wang, Chengshu
通讯作者	Zhang, GH
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2023
卷号	222
英文摘要	Shear strength of soil-root system (SRSS) is one of the most useful dynamic properties for evaluating soil erodibility and structural stability. The adjustment of land use may strongly affect SRSS by altering soil prop-erties and plant root system. Few studies have been conducted to investigate the effect of land use on SRSS in semi-arid region. This study was performed to quantify the variation in SRSS with five typical land use types (cropland, orchard, grassland, shrub land and woodland) and identify the related dominant contributing factors on the Loess Plateau where land use has changed greatly in the past several decades. In-situ shear tests with large shear box (25 x 25 x 10 cm) were conducted to measure shear stress-displacement curves. The strain energy calibrated to 15 % soil water content (SEc), peak shear stress (PSS) and the displacement of peak shear stress (DPS) calculated from the curves were used to reflect SRSS. The results showed that woodland had the maximum SEc (124.4 J m-2) and PSS (1048.6 kPa), whereas cropland had the minimum SEc (65.6 J m-2) and DPS (7.2 mm). Woodland, especially coniferous species and its mixed forest, might be the most suitable land use type for vegetation restoration on the Loess Plateau to enhance soil erodibility or structural stability. The variation in SRSS with land use was closely related to the changes in soil properties and root traits. PSS increased with penetration resistance, while it decreased with soil water content. DPS was positive correlated to root biomass and morphological traits. SEc was mainly affected by the direct and indirect effects of root surface area density, penetration resistance, soil organic matter content and aggregate stability. The results are helpful for under-standing the mechanical mechanism of vegetation restored soils to mitigate erosion and optimizing land use type in semi-arid region.
英文关键词	Soil-root system In-situ shear test Vegetation restoration Soil properties Root traits
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000954313500001
WOS关键词	AGGREGATE STABILITY ; TREE ROOTS ; REINFORCEMENT ; ERODIBILITY ; DETACHMENT ; RESISTANCE ; VEGETATION ; BEHAVIOR
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/2XILL650/395667
推荐引用方式 GB/T 7714	Xing, Shukun,Zhang, Guanghui,Zhu, Pingzong,et al. Variation in shear strength of soil-root system under five typical land use types on the Loess Plateau of China[J],2023,222.
APA	Xing, Shukun,Zhang, Guanghui,Zhu, Pingzong,Wang, Lili,Wang, Ziguan,&Wang, Chengshu.(2023).Variation in shear strength of soil-root system under five typical land use types on the Loess Plateau of China.CATENA,222.
MLA	Xing, Shukun,et al."Variation in shear strength of soil-root system under five typical land use types on the Loess Plateau of China".CATENA 222(2023).