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| Titel |
Responses of vertical soil moisture to rainfall pulses and land uses in a typical loess hilly area, China |
| VerfasserIn |
Y. Yu, W. Wei, L. D. Chen, F. Y. Jia, L. Yang, H. D. Zhang, T. J. Feng |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 6, no. 2 ; Nr. 6, no. 2 (2015-05-28), S.595-608 |
| Datensatznummer |
250115453
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| Publikation (Nr.) |
 copernicus.org/se-6-595-2015.pdf |
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| Zusammenfassung |
| Soil moisture plays a key role in vegetation restoration and ecosystem
stability in arid and semiarid regions. The response of soil moisture to
rainfall pulses is an important hydrological process, which is strongly
influenced by land use during the implementation of vegetation restoration.
In this study, vertical soil moisture variations of woodland
(Pinus tabulaeformis), native
grassland (Stipa bungeana), shrubland (Hippophea rhamnoides), cropland (Triticum aestivum) and artificial grassland
(Onobrychis viciaefolia) in five soil profiles were monitored in a typical loess hilly area during
the 2010 growing season. The results demonstrated that rainfall pulses
directly affected soil moisture variation. A multi-peak pattern of soil
moisture appeared during the growing season, notably in the surface soil
layer. Meanwhile, the response of each vegetation type to rainfall was
inconsistent, and a time-lag effect before reaching the peak value was
detected, following each heavy rainfall event. The response duration of soil
moisture, however, varied markedly with the size of rainfall events.
Furthermore, higher soil water content was detected in grassland and
shrubland. Woodland was characterized by relatively lower soil moisture
values throughout the investigation period. Our research suggests that
vegetation restoration efforts should give priority to grassland and
shrubland at the research site. We suggest that more studies should be
focused on the characteristics of community structure and spatial vegetation
distribution on soil moisture dynamics, particularly within the grass and
shrub ecosystems. |
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