Full TGIF Record # 278306
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Web URL(s):https://scisoc.confex.com/scisoc/2016am/webprogram/Paper101103.html
    Last checked: 11/28/2016
Publication Type:
Content Type:Abstract or Summary only
Author(s):Rosas-Anderson, Pablo; Taggart, Matthew J.; Rufty, Thomas W.; Blount, William; Heitman, Joshua
Author Affiliation:Rosas-Anderson: North Carolina State University, Raleigh, NC; Taggart and Rufty: Crop Science, North Carolina State University, Raleigh, NC; Blount: NCSU, Raleigh, NC; Heitman: Crop and Soil Sciences, North Carolina State University, Raleigh, NC
Title:Substantial nighttime evapotranspiration and soil evaporation in Agrostis stolonifera
Section:C05 turfgrass science
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Turfgrass science poster
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Meeting Info.:Phoenix, Arizona: November 6-9, 2016
Source:ASA, CSSA and SSSA International Annual Meetings. 2016, p. 101103.
Publishing Information:[Milwaukee, Wisconsin]: [American Society of Agronomy and the Entomological Society of America]
# of Pages:1
Keywords:TIC Keywords: Agrostis stolonifera; Deficit irrigation; Evaporation; Evapotranspiration; Transpiration; Vapor pressure; Water management; Water requirements
Abstract/Contents:"Turf water requirements are often estimated by using the Penman-Monteith model. However, the Penman-Monteith assumes no nighttime transpiration (T). Nighttime T has been shown to represent a significant amount of water loss from various plant canopies. If nighttime T ocurs in turfgrass systems it is likely that under some conditions they are under deficit irrigation. In this study, evapotranspiration (ET) during the light and dark in response to vapor pressure deficit (VPD) was investigated in growth chambers. Evapotranspiration from potted Agrostis stolonifera taken from field cores was measured continuously using automated balances. All plants were subjected to various VPD treatments during the light and dark periods. To partition the sources of ET, a set of pots was treated with an herbicide so that transpirational water loss would be excluded while retaining a physical barrier of resistance. To calculate T, soil evaporation from herbicide-treated cores was subtracted from ET of living grass. Nighttime ET ranged from about 0.05 mm h-1 at VPDs below 0.5 kPa to 0.35 mm h-1 at VPDs above 3.5 kPa and represented about 37-38% of daily ET across VPD values. Nighttime T represented about 30% of daily T. Soil evaporation was a larger component of ET than T in both the day and the night ranging from about 50-72% of ET. However, there is likely an overestimation of E in our system. Nevetheless, these results indicate that proper water management of soils may have a significant impact for reducing ET. This applies particularly to locations where VPD may be high during the night. Additionally, substantial nighttime T indicates that on some days during the season turfgrasses may be subjected to deficit irrigation."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Rosas-Anderson, P., M. J. Taggart, T. W. Rufty, W. Blount, and J. Heitman. 2016. Substantial nighttime evapotranspiration and soil evaporation in Agrostis stolonifera. Agron. Abr. p. 101103.
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    Last checked: 11/28/2016
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