Arid
DOI10.1016/j.geoderma.2012.08.008
Self-organized vegetation patterning effects on surface soil hydraulic conductivity: A case study in the Qilian Mountains, China
Liu, Hu1,2,3; Zhao, Wenzhi1,2; He, Zhibin1,2
通讯作者Liu, Hu
来源期刊GEODERMA
ISSN0016-7061
出版年2013
卷号192页码:362-367
英文摘要

tension infiltrometer technique was used to determine the effects of vegetation patterning on the hydraulic properties of surface soils in an alpine catchment unit previously used as rain-fed agricultural land but now exhibiting a significantly self-organized vegetation pattern, with a shrub-covered surface on the north-facing slope and a grass-covered surface on the south-facing slope. We hypothesized that the surface soils in the catchment unit had a random pattern with relatively uniform variance before the fencing program began in 2000, because of long-term tillage and crop production, and we found a slightly organized and apparently heterogeneous pattern of K-s after the recovery period. While a relatively higher average K-s was observed on the north-facing slope than on the south-facing slope, the difference was not statistically significant. The surface soil hydraulic pattern in the catchment unit was controlled mainly by terrain-related processes such as runoff sealing and compaction, and vegetation patterning did not contribute as much as we expected to its development. Although the positive feedbacks between vegetation and soil we postulated in this work were not observed, such a positive feedback may exist in the root-zone soil profile, as indicated by the significant differences in physical and chemical parameters of soil profiles on different slope positions, e.g. bulk density, field capacity, total C, N and available P. etc. Assertion of the statement, however, is still subject to debate because of the limited data, and deserves much more detailed research and investigation in the future. (C) 2012 Elsevier B.V. All rights reserved.


英文关键词Hydraulic conductivity Self-organization Catchment unit Vegetation patterning Tension infiltrometer
类型Article
语种英语
国家Peoples R China ; USA
收录类别SCI-E
WOS记录号WOS:000313154900039
WOS关键词SEMIARID ECOSYSTEMS ; SPATIAL VARIABILITY ; ARID ECOSYSTEMS ; INFILTRATION ; WATER ; TILLAGE ; GRADIENT ; TENSION ; DYNAMICS ; CLIMATE
WOS类目Soil Science
WOS研究方向Agriculture
来源机构中国科学院西北生态环境资源研究院
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/177320
作者单位1.Chinese Ecosyst Res Network, Linze Inland River Basin Res Stn, Lanzhou 730000, Peoples R China;
2.Chinese Acad Sci, Key Lab Ecohydrol & River Basin Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China;
3.Penn State Univ, Dept Crop & Soil Sci, University Pk, PA 16802 USA
推荐引用方式
GB/T 7714
Liu, Hu,Zhao, Wenzhi,He, Zhibin. Self-organized vegetation patterning effects on surface soil hydraulic conductivity: A case study in the Qilian Mountains, China[J]. 中国科学院西北生态环境资源研究院,2013,192:362-367.
APA Liu, Hu,Zhao, Wenzhi,&He, Zhibin.(2013).Self-organized vegetation patterning effects on surface soil hydraulic conductivity: A case study in the Qilian Mountains, China.GEODERMA,192,362-367.
MLA Liu, Hu,et al."Self-organized vegetation patterning effects on surface soil hydraulic conductivity: A case study in the Qilian Mountains, China".GEODERMA 192(2013):362-367.
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