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Precipitation and soil impacts on partitioning of subsurface moisture in Avena barbata

Rohit Salve and Margaret Torn
Precipitation and soil impacts on partitioning of subsurface moisture in Avena barbata
Vadose Zone Journal (February 2011) 10 (1): 437-449

Abstract

The primary objective of this study was to assess the impact of two grassland soils and precipitation regimes on soil-moisture dynamics. We set up an experiment in a greenhouse and monitored the soil moisture dynamics in mesocosms planted with Avena barbata, an annual species found in California grasslands. By repeating the precipitation input at regular intervals, we were able to observe plant manipulation of soil moisture during well-defined periods during the growing season. We found that the amount of water partitioned to evapotranspiration, seepage, and soil storage varied among different growth stages. Furthermore, both soil type and precipitation regime had a significant impact on redistributing soil moisture. Whereas in the low-precipitation treatments most water was released to the atmosphere as evapotranspiration, major losses from the high-precipitation treatment occurred as gravity drainage. Observations from this study emphasize the importance of understanding intraseasonal relationships between vegetation, soil, and water.


ISSN: 1539-1663
Serial Title: Vadose Zone Journal
Serial Volume: 10
Serial Issue: 1
Title: Precipitation and soil impacts on partitioning of subsurface moisture in Avena barbata
Affiliation: Lawrence Berkeley National Laboratory, Berkeley, CA, United States
Pages: 437-449
Published: 201102
Text Language: English
Publisher: Soil Science Society of America, Madison, WI, United States
References: 39
Accession Number: 2011-031260
Categories: Environmental geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
N34°36'52" - N34°36'52", W120°04'48" - W120°04'48"
N38°45'00" - N40°00'00", W124°00'00" - W122°46'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201118
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