Full TGIF Record # 95061
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DOI:10.21273/HORTSCI.39.2.388
Web URL(s):https://journals.ashs.org/hortsci/view/journals/hortsci/39/2/article-p388.xml?rskey=givOLF
    Last checked: 11/19/2019
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Publication Type:
i
Refereed
Author(s):Brown, C. A.; Devitt, D. A.; Morris, R. L.
Author Affiliation:Brown: Department of Water Resource Management, University of Nevada Las Vegas, Las Vegas, Nevada; Devitt: Department of Environmental and Resource Sciences and Cooperative Extension, University of Nevada Reno, Las Vegas, Nevada; Morris: Cooperative Extension, University of Nevada Reno, Las Vegas, Nevada
Title:Water use and physiological response of tall fescue turf to water deficit irrigation in an arid environment
Section:Turf management
Other records with the "Turf management" Section
Source:HortScience. Vol. 39, No. 2, April 2004, p. 388-393.
Publishing Information:Alexandria, VA: American Society for Horticultural Science
# of Pages:6
Keywords:TIC Keywords: Water use; Irrigation scheduling; Water conservation; Nitrogen; Festuca arundinacea; Water deficit; Irrigation; Evapotranspiration; Color
Abstract/Contents:"Research was conducted to assess the response of tall fescue (Festuca arundinacea Schreb.) to water deficit conditions. Different leaching fractions (LF = drainage volume/irrigation volume) and irrigation frequencies (IF) were imposed over a 119-day summer period in Las Vegas, Nevada, followed by a 71-day recovery period. Plots of tall fescue contained 120 cm deep × 51 cm diameter draining lysimeters. Irrigations were based on an evapotranspiration (ET) feedback system to establish LFs of +0.15, 0.00, -0.15, -0.25, and -0.40. Plots were irrigated on a daily or twice per week schedule. N was applied to subplots at a rate of 0, 12.2, or 24.4 kg·ha-1 per month. As LF decreased, relative soil water in storage declined in a linear fashion (r2 = 0.97, P = 0.001). Storage depletions for the four lowest LFs at the end of 119 days of imposed water deficits were about 15%, 40%, 60%, and 70% compared to the +0.15 LF treatment. Canopy temperature, soil matric potential (Ψm), leaf xylem water potential (ΨLX), leaf stomatal conductance (gs), clipping yield, color and cover ratings all statistically separated (P < 0.05) based on LF but not on IF. However, irrigation amount (I), ET, tissue moisture content and total Kjeldahl N (TKN) separated based on LF and IF with a significant LF by IF interaction for I (P < 0.05) and TKN (P < 0.001). An irrigation savings of 60.4 cm was realized during the 119-day water deficit period at the -0.40 LF. However, at the lower LFs, plant stress increased (all parameters) with color ratings declining below an acceptable value of 8.0. An Irrigation/Potential ET (I/ETo) threshold of 0.80 was determined for both color and cover. After a 71-day recovery period both color and cover returned to pre experimental values at the two higher N rates. Results of this experiment indicate that implementing a twice weekly irrigation strategy at a -0.15 LF on tall fescue during summer months in an arid environment would lead to savings of 37.5 cm of water while still maintaining acceptable color and cover ratings."
Language:English
References:22
Note:Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Brown, C. A., D. A. Devitt, and R. L. Morris. 2004. Water use and physiological response of tall fescue turf to water deficit irrigation in an arid environment. HortScience. 39(2):p. 388-393.
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DOI: 10.21273/HORTSCI.39.2.388
Web URL(s):
https://journals.ashs.org/hortsci/view/journals/hortsci/39/2/article-p388.xml?rskey=givOLF
    Last checked: 11/19/2019
    Requires: PDF Reader
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