Full TGIF Record # 66371
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DOI:10.21273/HORTSCI.35.3.412E
Web URL(s):https://journals.ashs.org/hortsci/view/journals/hortsci/35/3/article-p412E.xml?rskey=C69Ibn
    Last checked: 11/14/2019
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Kjelgren, Roger; Cole, Janet
Author Affiliation:Kjelgren: Plants and Soils Department, Utah State University, Logan, UT; Cole: Department of Horticulture and Landscape Architecture, Oklahoma State University, Stillwater, OK
Title:Energy balance and water loss of two shade tree species over asphalt and turf in contrasting climate
Section:Poster session 4: Crop physiology
Other records with the "Poster session 4: Crop physiology" Section
Meeting Info.:97th International Conference of the American Society for Horticultural Science, 23-26 July, 2000, Lake Buena Vista, FL
Source:HortScience. Vol. 35, No. 3, June 2000, p. 412-413.
Publishing Information:Alexandria, VA: American Society for Horticultural Science
# of Pages:2
Keywords:TIC Keywords: Energy balance; Transpiration; Trees; Shade; Shading; Asphalt; Comparisons; Microclimate; Stomatal conductance; Temperatures; Vapor pressure; Humidity; Radiation; Environmental factors; Climatic factors
Abstract/Contents:"We investigated water loss of shade trees over turf and asphalt in an arid and humid climate for Russian olive and silver maple. Total daily tree water loss, and dawn-to-dusk stomatal conductance (g^D[s) and leaf temperature (T^D[l), as well as air temperature, surface temperature, and vapor pressure deficit, were measured in Logan, Utah and Stillwater, Okla., in early and mid-summer. Midday air temperatures in mid-summer were similar at both locations, 30 to 35 °C. Comparable vapor pressure deficits (VPD, kPa) were much higher in Logan, 3.5-5.0, than Stillwater, 2-2.5. Differences in humidity and air temperature between asphalt and turf were negligible at both Stillwater and Logan. Midday surface temperatures for asphalt and turf averaged 34 and 50 °C, respectively, in Logan, but were 10 °C higher for both surfaces in Oklahoma. The effect of higher longwave radiation from hotter surfaces on stomatal conductance and water loss of trees over asphalt in Stillwater was not consistently different for either species from those over turf. However, at Logan, T^D[l of trees over asphalt were consistently 2 to 4 °C higher and g^D[s was 10% to 20% lower than those over turf. Stomatal closure for trees over asphalt resulted in water loss that was the same or slightly lower as trees over turf. The effect of paved surfaces on tree water loss appears to be more pronounced in an arid than a humid climate. The combined effect of higher VPD in an arid region and greater longwave radiation from hotter paved surfaces induces stomatal closure that limits water loss, and likely photosynthesis. By contrast, in humid regions, increased tree radiation interception over ashpalt does not appear to trigger stomatal closure due to lower VPD."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kjelgren, R., and J. Cole. 2000. Energy balance and water loss of two shade tree species over asphalt and turf in contrasting climate. HortScience. 35(3):p. 412-413.
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DOI: 10.21273/HORTSCI.35.3.412E
Web URL(s):
https://journals.ashs.org/hortsci/view/journals/hortsci/35/3/article-p412E.xml?rskey=C69Ibn
    Last checked: 11/14/2019
    Requires: PDF Reader
    Notes: Item is within a single large file
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MSU catalog number: SB 1 .H64
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