Bedrock erosion due to hoeing as tillage technique in a hilly agricultural landscape, southwest China

doi:10.1002/esp.4813

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Bedrock erosion due to hoeing as tillage technique in a hilly agricultural landscape, southwest China
	Xu, Haichao 1,2; Zhang, Jianhui 2; Wei, Yuhang 1,2; Dai, Jiadong 1,2; Wang, Yong 1,2
刊名	EARTH SURFACE PROCESSES AND LANDFORMS
	2020-02-21
页码	DOI: 10.1002/esp.4813
关键词	bedrock fragmentation tillage erosion slope gradient hoeing depth soil-covered thickness tracing method
ISSN号	0197-9337
DOI	10.1002/esp.4813
通讯作者	Zhang, Jianhui(zjh@imde.ac.cn)
产权排序	1
文献子类	Article; Early Access
英文摘要	Tillage on hillslopes may not only induce severe soil erosion, but may also cause bedrock erosion under certain conditions. Yet, little is known about bedrock erosion by tillage in a hilly agricultural landscape, southwest China. The aim of this study is to quantify the translocation of rock fragments derived from bedrock fragmentation by hoeing under different conditions, including slope gradient, hoeing depth and soil-covered thickness using a gravel tracing method. The reliability of the gravel tracing method was confirmed by the bedrock dyeing tracing method. Hoeing depth is a significant factor affecting the translocation rate of rock fragments (Q(r)). Meanwhile, under the condition of overlying soil layers (0.06-0.10 m thick), the values of Q(r) were significantly smaller with a reduction of 20.7-25.6%, compared with rock fragmentation by hoeing for bare bedrock. However, slope gradient was found to have insignificant effects on Q(r). Fractured bedrock moved as individual small fragments, which was mainly controlled by the hitting force of the hoe, while soil moved in the shape of lumps, which was dominated by both drag force of the hoe and gravity. This study suggests that hoeing into soil-covered bedrock can diminish bedrock erosion while providing soil matrix for shallow soil layers. Our work presents a quantitative assessment of bedrock erosion by hoeing and an underlying insight into characteristics of bedrock erosion by tillage operations in hilly agricultural regions with mudstone and shale, southwest China. (c) 2020 John Wiley & Sons, Ltd.
电子版国际标准刊号	1096-9837
资助项目	National Natural Science Foundation of China[41571267] ; National Natural Science Foundation of China[41877069] ; 135 Strategic Program of the Institute of Mountain Hazards and Environment, CAS[SDS-135-1702]
WOS关键词	ROCK FRAGMENT COVER ; SOIL-EROSION ; CULTIVATED SOILS ; FARMING SYSTEMS ; WATER EROSION ; SICHUAN BASIN ; STEEP SLOPES ; TRANSLOCATION ; LAND ; MOVEMENT
WOS研究方向	Physical Geography ; Geology
语种	英语
出版者	WILEY
WOS记录号	WOS:000514634200001
资助机构	National Natural Science Foundation of China ; 135 Strategic Program of the Institute of Mountain Hazards and Environment, CAS
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/34051]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Zhang, Jianhui
作者单位	1.Univ Chinese Acad Sci, Beijing, Peoples R China; 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China; 3.Sichuan Agr Univ, Coll Water Conservancy & Hydropower Engn, Yaan, Peoples R China
推荐引用方式 GB/T 7714	Xu, Haichao,Zhang, Jianhui,Wei, Yuhang,et al. Bedrock erosion due to hoeing as tillage technique in a hilly agricultural landscape, southwest China[J]. EARTH SURFACE PROCESSES AND LANDFORMS,2020:DOI: 10.1002/esp.4813.
APA	Xu, Haichao,Zhang, Jianhui,Wei, Yuhang,Dai, Jiadong,&Wang, Yong.(2020).Bedrock erosion due to hoeing as tillage technique in a hilly agricultural landscape, southwest China.EARTH SURFACE PROCESSES AND LANDFORMS,DOI: 10.1002/esp.4813.
MLA	Xu, Haichao,et al."Bedrock erosion due to hoeing as tillage technique in a hilly agricultural landscape, southwest China".EARTH SURFACE PROCESSES AND LANDFORMS (2020):DOI: 10.1002/esp.4813.