气候变化领域集成服务门户(CCPortal): Effects of Textural Layering on Water Regimes in Sandy Soils in a Desert-Oasis Ecotone, Northwestern China

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DOI	10.3389/feart.2021.627500
	Effects of Textural Layering on Water Regimes in Sandy Soils in a Desert-Oasis Ecotone, Northwestern China
	Sun, Chengpeng; Zhao, Wenzhi; Liu, Hu; Zhang, Yongyong; Zhou, Hong
通讯作者	Zhao, WZ (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol & River Basin Sci, Lanzhou, Peoples R China. ; Zhao, WZ (通讯作者)，Chinese Ecosyst Res Network, Linze Inland River Basin Res Stn, Lanzhou, Peoples R China.
发表日期	2021
EISSN	2296-6463
卷号	9
英文摘要	Textural layering of soil plays an important role in distributing and regulating resources for plants in many semiarid and arid landscapes. However, the spatial patterns of textural layering and the potential effects on soil hydrology and water regimes are poorly understood, especially in arid sandy soil environments like the desert-oasis ecotones in northwestern China. This work aims to determine the distribution of textural layered soils, analyze the effects of different soil-textural configurations on water regimes, and evaluate which factors affect soil water infiltration and retention characteristics in such a desert-oasis ecotone. We measured soil water content and mineral composition in 87 soil profiles distributed along three transects in the study area. Constant-head infiltration experiments were conducted at 9 of the soil profiles with different texture configurations. The results showed that textural layered soils were patchily but extensively distributed throughout the study area (with a combined surface area percentage of about 84%). Soil water content in the profiles ranged from 0.002 to 0.27 g/cm(3) during the investigation period, and significantly and positively correlated with the thickness of a medium-textured (silt or silt loam) layer (p < 0.001). The occurrence of a medium-textured layer increased field capacity and wilting point and decreased available water-holding capacity in soil profiles. Burial depth of the medium-textured layer had no clear effects on water retention properties, but the layer thickness tended to. In textural layered soils, smaller water infiltration rate and cumulative infiltration, and shallower depths of wetting fronts were detected, compared with homogeneous sand profiles. The thickness and burial depth of medium-textured layers had obvious effects on infiltration, but the magnitude of the effects depended on soil texture configuration. The revealed patterns of soil textural layering and the potential effects on water regimes may provide new insight into the sustainable management of rainfed vegetation in the desert-oasis ecotones of arid northwestern China and other regions with similar environments around the world.
英文关键词	Textural layering; Soil hydrology; Water retention; Water infiltration; Water regimes
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000618642000001
来源期刊	FRONTIERS IN EARTH SCIENCE
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254206
作者单位	[Sun, Chengpeng; Zhao, Wenzhi; Liu, Hu; Zhang, Yongyong] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol & River Basin Sci, Lanzhou, Peoples R China; [Sun, Chengpeng; Zhao, Wenzhi; Liu, Hu; Zhang, Yongyong] Chinese Ecosyst Res Network, Linze Inland River Basin Res Stn, Lanzhou, Peoples R China; [Sun, Chengpeng] Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China; [Zhou, Hong] Northwest Normal Univ, Tourism Coll, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Sun, Chengpeng,Zhao, Wenzhi,Liu, Hu,et al. Effects of Textural Layering on Water Regimes in Sandy Soils in a Desert-Oasis Ecotone, Northwestern China[J]. 中国科学院西北生态环境资源研究院,2021,9.
APA	Sun, Chengpeng,Zhao, Wenzhi,Liu, Hu,Zhang, Yongyong,&Zhou, Hong.(2021).Effects of Textural Layering on Water Regimes in Sandy Soils in a Desert-Oasis Ecotone, Northwestern China.FRONTIERS IN EARTH SCIENCE,9.
MLA	Sun, Chengpeng,et al."Effects of Textural Layering on Water Regimes in Sandy Soils in a Desert-Oasis Ecotone, Northwestern China".FRONTIERS IN EARTH SCIENCE 9(2021).