globalchange  > 气候减缓与适应
DOI: 10.1016/j.scitotenv.2018.08.211
WOS记录号: WOS:000447805500089
论文题名:
Relationship between soil water content and soil particle size on typical slopes of the Loess Plateau during a drought year
作者: Zhang, Xiao1,2,3; Zhao, Wenwu1,2; Wang, Lixin3; Liu, Yuanxin1,4; Liu, Yue1,2; Feng, Qiang1,5
通讯作者: Zhao, Wenwu
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
ISSN: 0048-9697
EISSN: 1879-1026
出版年: 2019
卷: 648, 页码:943-954
语种: 英语
英文关键词: Particle-size distribution ; Soil-water characteristic curve ; Fractal dimension ; Drought year ; Loess plateau
WOS关键词: DIFFERENT VEGETATION TYPES ; ORGANIC-CARBON ; LAND-USE ; BULK-DENSITY ; HYDRAULIC CONDUCTIVITY ; NATURAL SUCCESSION ; MOISTURE ; DISTRIBUTIONS ; OASIS ; RESTORATION
WOS学科分类: Environmental Sciences
WOS研究方向: Environmental Sciences & Ecology
英文摘要:

In the context of global climate change aswell as local climatewarming and drying on the Loess Plateau of China, understanding the relationship between soil particle size and soilwater distribution during years of atypical precipitation is important. In this study, fractal geometry theory is used to describe themechanical composition and texture of soils to improve our understanding of hydropedology and ecohydrology in the critical zone on the Loess Plateau. One grassland slope and two shrubland slopes were selected in the hilly and gully region of the Loess Plateau, and soilswere sampled along hillslope transects at depths of 0-500 cm. Fractal theory and redundancy analysis (RDA) were used to identify relationships between the fractal dimension of soil particle-size distributions and the corresponding van Genuchten parameters for the soil-water-characteristic curves. The ovendrying method was used to measure soil water content, and the high-speed centrifugation method was used to generate soil-water-characteristic curves. The results show that (1) the soil water that can be used by Caragana korshinskii during a drought year is distributed below 2 m from the surface, whereas the soil water that can be used by grass is below 1.2 m; (2) Caragana korshinskii promotes the conservation of fine soil particles more than does natural restored grass, and the soil particle-size distribution fractal dimension changes with depth and position; and (3) soil hydraulic properties correlate strongly with soil pedological properties such as bulk density and the soil particle-size distribution fractal dimension. These results provide a case study of the relationships among soil distributions, hydrologic and geomorphic processes for vegetation restoration in drylands with a thick vadose zone. More studies on soil property changes are needed to provide case studies and empirical support for ecological restoration in the Loess Plateau of China. (C) 2018 Elsevier B.V. All rights reserved.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/127929
Appears in Collections:气候减缓与适应

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作者单位: 1.Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China
2.Beijing Normal Univ, Fac Geog Sci, Inst Land Surface Syst & Sustainable Dev, Beijing 100875, Peoples R China
3.IUPUI, Dept Earth Sci, Indianapolis, IN 46202 USA
4.Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
5.Shanxi Agr Univ, Coll Forestry, Taigu 030801, Shanxi, Peoples R China

Recommended Citation:
Zhang, Xiao,Zhao, Wenwu,Wang, Lixin,et al. Relationship between soil water content and soil particle size on typical slopes of the Loess Plateau during a drought year[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019-01-01,648:943-954
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