Conference proceeding
Effects of Thinning on Transpiration by Riparian Buffer Trees in Response to Advection and Solar Radiation
VIII International Symposium on Sap Flow, Vol.951(951), pp.225-231
Acta Horticulturae
06/01/2012
DOI: 10.17660/actahortic.2012.951.27
Abstract
Upwind advective energy occurring in edge environments may increase tree water use. In humid agricultural landscapes, advection-enhanced transpiration in riparian buffers may provide hydrologic regulation. The objectives of this study were to determine how water use by trees growing in a riparian buffer in central Iowa is influenced by 1) advective energy, 2) tree position, and 3) thinning (40% LAI reduction). We measured meteorological variables and sap flux density from July to September in 13 trees (2009) and 12 trees (2010) in one thinned plot (TP, treated in Aug 2010) and one untreated (control) plot (UP). The difference in Q(s) between edge and interior trees (39% higher in 2009) was attributed to the advective energy at the buffer edge. After thinning, maximum Q(s) increased was greater in TP compared to UP, explained primarily by solar radiation (R-2=0.7, p<0.05), since meteorological conditions were not optimal for advection. However, the LAI reduction counteracted the increase in whole tree Q(s), such that post-treatment plot transpiration per LAI measured from TP (0.4 mm day(-1)) was less than for UP (0.5 mm day(-1)).
Details
- Title: Subtitle
- Effects of Thinning on Transpiration by Riparian Buffer Trees in Response to Advection and Solar Radiation
- Creators
- V. Hernandez-Santana - Iowa State UniversityH. Asbjornsen - Iowa State UniversityT. Sauer - National Laboratory for Agriculture and the EnvironmentT. Isenhart - Iowa State UniversityR. Schultz - Iowa State UniversityK. Schilling - Iowa Geol Survey, Iowa Dept Nat Resources, Iowa City, IA USA
- Contributors
- L Sebastiani (Editor)R Tognetti (Editor)A Motisi (Editor)
- Resource Type
- Conference proceeding
- Publication Details
- VIII International Symposium on Sap Flow, Vol.951(951), pp.225-231
- Publisher
- Int Soc Horticultural Science
- Series
- Acta Horticulturae
- DOI
- 10.17660/actahortic.2012.951.27
- ISSN
- 0567-7572
- eISSN
- 2406-6168
- Number of pages
- 7
- Language
- English
- Date published
- 06/01/2012
- Academic Unit
- Earth and Environmental Sciences; IIHR--Hydroscience and Engineering
- Record Identifier
- 9984383884102771
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