Full TGIF Record # 52577
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Web URL(s):https://www.crops.org/publications/cs/pdfs/38/3/CS0380030788
    Last checked: 08/05/2010
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Publication Type:
i
Refereed
Author(s):Ervin, Erik H.; Koski, Anthony J.
Author Affiliation:Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, CO 80523
Title:Drought avoidance aspects and crop coefficients of Kentucky bluegrass and tall fescue turfs in the semiarid West
Section:Turfgrass science
Other records with the "Turfgrass science" Section
Source:Crop Science. Vol. 38, No. 3, May/June 1998, p. 788-795.
Publishing Information:Madison, WI: Crop Science Society of America
# of Pages:8
Keywords:TIC Keywords: Water conservation; Poa pratensis; Festuca arundinacea; Drought resistance; Comparisons; Crop coefficient; Penman equations; Irrigation rates; Root weight; Soil moisture; Soil depth
Geographic Terms:Colorado
Abstract/Contents:"Increasing demand for the scarce water resources of the semiarid western USA, coupled with the highly visible practice of landscape irrigation, has fostered concern regarding turfgrass water conservation. Our objectives were (i) to assess some of the physiological responses and morphological factors which contribute to the drought avoidance capabilities of Kentucky bluegrass (KBG, Poa pratensis L.) and tall fescue (Festuca arundinacea Schreber) turfs subjected to increasing levels of drought through the use of a line-source irrigation system (LSIS), and (ii) to develop water-conserving crop coefficients (K^D[c) to be used with Penman equation estimates of alfalfa (Medicago sativa L.) reference evapotranspiration (ET^D[r), while maintaining these turfs at an acceptable level of quality. The effects of turfgrass species and irrigation level on root dry weight, leaf firing, canopy temperatures, gravimetric soil moisture content, and quality were investigated at Fort Collins, CO on a Nunn clay loam (fine, montmorillonitic, mesic Aridic Argiustoll). Irrigation treatments were delivered with a LSIS. In 1993, turf-type tall fescue (TF) had 65% more root dry weight from 31 to 90 cm than KGB. In 1994, tall fescue had 45% more total dry root weight from 31 to 90 cm than KBG. Consequently, tall fescue gravimetric soil moisture contents at the two deeper sample depths (31-60 and 61-90 cm) were generally lower than those of KGB [KBG]. Tall fescue's capacity to exploit deep soil moisture when surface inputs became limiting were reflected in significantly higher quality ratings, lower leaf-firing ratings, and lower canopy temperatures relative to KBG. Our conclusion is that, in Colorado, water can be conserved while maintaining acceptable turfgrass quality by irrigating these two turfs every 3 d by adjusting ET^D[r with a KBG coefficient of 0.70 and a TF coefficient of 0.60, provided that soil conditions are such that tall fescue can produce a deep root system."
Language:English
References:25
See Also:Other items relating to: Disasters - Drought
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Ervin, E. H., and A. J. Koski. 1998. Drought avoidance aspects and crop coefficients of Kentucky bluegrass and tall fescue turfs in the semiarid West. Crop Sci. 38(3):p. 788-795.
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https://www.crops.org/publications/cs/pdfs/38/3/CS0380030788
    Last checked: 08/05/2010
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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