Spatial and temporal variation in soil bulk density and saturated hydraulic conductivity and its influencing factors along a 500 km transect

doi:10.1016/j.catena.2021.105592

IEECAS OpenIR > 生态环境研究室

	Spatial and temporal variation in soil bulk density and saturated hydraulic conductivity and its influencing factors along a 500 km transect
	Zhao, Yali 1,2,4,5; Wang, Yunqiang 2,3,4,5; Zhang, Xingchang 1,5
通讯作者	Wang, Yunqiang(wangyunq04@163.com) ; Zhang, Xingchang(zhangxc@ms.iswc.ac.cn)
	2021-12-01
发表期刊	CATENA
ISSN	0341-8162
卷号	207 页码:10
摘要	Soil bulk density (BD) and saturated hydraulic conductivity (Ks) are two critical soil physical parameters that affect soil water holding capacity, infiltration, carbon stocks, and many land and surface processes. Although variations in spatial and temporal BD and Ks are widely recognized and known to differ at different scales, little large-scale data is available. This study explores changes in spatial and temporal BD and Ks along a 500 km transect on the Chinese Loess Plateau (CLP). On seven different occasions, we took BD and Ks measurements in undisturbed soil samples within the surface (0-10 cm) and subsurface (10-20 cm) soil layers from August 2015 to October 2018 along this long transect. This transect covers two climate zones (subhumid and semiarid) and mainly includes five land-use types. BD and log10-transformed Ks (LogKs) exhibited weak and moderate spatial variations during different sampling periods along the long transect, respectively. The highest LogKs values of the two soil layers were observed in summer. Only BD (LogKs) in the surface soil layer of semiarid zone was significantly higher (lower). Grassland had slightly lower BD and higher Ks compared to the other land-use types. Climate had no significant effect on BD and Ks variability. Land-use type and season separately had a significant impact on BD and Ks variability, while sampling time significantly influenced both BD and Ks variability. Ks was negatively correlated with soil water content in spring, summer and autumn. In this long transect, spatial and temporal variations in BD and Ks are determined by land-use types, seasonal changes, sampling time and soil water condition. Understanding temporal BD and Ks variations and their dominant factors will help in the selection of soil physical parameters to optimize hydrological models more accurately at a regional scale.
关键词	Hydraulic conductivity Loessial soil Long transect Soil bulk density Temporal variation Loess Plateau
DOI	10.1016/j.catena.2021.105592
关键词[WOS]	SEASONAL-CHANGES ; LAND USES ; SURFACE ; VARIABILITY ; COVER
收录类别	SCI ; SCI
语种	英语
资助项目	National Key Research and Development Program of China[2019YFA0607303] ; National Natural Science Foundation of China[41971045] ; National Natural Science Foundation of China[41722106] ; National Natural Science Foundation of China[41530854] ; innovation cross team project of West Light Foundation -key laboratory of Chinese Academy of Sciences
WOS研究方向	Geology ; Agriculture ; Water Resources
项目资助者	National Key Research and Development Program of China ; National Natural Science Foundation of China ; innovation cross team project of West Light Foundation -key laboratory of Chinese Academy of Sciences
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS记录号	WOS:000703268900017
出版者	ELSEVIER
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/17083
专题	生态环境研究室第四纪科学与全球变化卓越创新中心
通讯作者	Wang, Yunqiang; Zhang, Xingchang
作者单位	1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China 3.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 4.Natl Observat & Res Stn Earth Crit Zone & Terr Su, Xian 710061, Shaanxi, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Yali,Wang, Yunqiang,Zhang, Xingchang. Spatial and temporal variation in soil bulk density and saturated hydraulic conductivity and its influencing factors along a 500 km transect[J]. CATENA,2021,207:10.
APA	Zhao, Yali,Wang, Yunqiang,&Zhang, Xingchang.(2021).Spatial and temporal variation in soil bulk density and saturated hydraulic conductivity and its influencing factors along a 500 km transect.CATENA,207,10.
MLA	Zhao, Yali,et al."Spatial and temporal variation in soil bulk density and saturated hydraulic conductivity and its influencing factors along a 500 km transect".CATENA 207(2021):10.